Merge tag 'mm-nonmm-stable-2022-12-12' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull non-MM updates from Andrew Morton:

 - A ptrace API cleanup series from Sergey Shtylyov

 - Fixes and cleanups for kexec from ye xingchen

 - nilfs2 updates from Ryusuke Konishi

 - squashfs feature work from Xiaoming Ni: permit configuration of the
   filesystem's compression concurrency from the mount command line

 - A series from Akinobu Mita which addresses bound checking errors when
   writing to debugfs files

 - A series from Yang Yingliang to address rapidio memory leaks

 - A series from Zheng Yejian to address possible overflow errors in
   encode_comp_t()

 - And a whole shower of singleton patches all over the place

* tag 'mm-nonmm-stable-2022-12-12' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (79 commits)
  ipc: fix memory leak in init_mqueue_fs()
  hfsplus: fix bug causing custom uid and gid being unable to be assigned with mount
  rapidio: devices: fix missing put_device in mport_cdev_open
  kcov: fix spelling typos in comments
  hfs: Fix OOB Write in hfs_asc2mac
  hfs: fix OOB Read in __hfs_brec_find
  relay: fix type mismatch when allocating memory in relay_create_buf()
  ocfs2: always read both high and low parts of dinode link count
  io-mapping: move some code within the include guarded section
  kernel: kcsan: kcsan_test: build without structleak plugin
  mailmap: update email for Iskren Chernev
  eventfd: change int to __u64 in eventfd_signal() ifndef CONFIG_EVENTFD
  rapidio: fix possible UAF when kfifo_alloc() fails
  relay: use strscpy() is more robust and safer
  cpumask: limit visibility of FORCE_NR_CPUS
  acct: fix potential integer overflow in encode_comp_t()
  acct: fix accuracy loss for input value of encode_comp_t()
  linux/init.h: include <linux/build_bug.h> and <linux/stringify.h>
  rapidio: rio: fix possible name leak in rio_register_mport()
  rapidio: fix possible name leaks when rio_add_device() fails
  ...

100 files changed, 750 insertions, 302 deletions

diff --git a/.mailmap b/.mailmap
index 2301c29ccf6d..ccba4cf0d893 100644
--- a/.mailmap
+++ b/.mailmap
@@ -228,6 +228,7 @@ Juha Yrjola <at solidboot.com>
 Juha Yrjola <juha.yrjola@nokia.com>
 Juha Yrjola <juha.yrjola@solidboot.com>
 Julien Thierry <julien.thierry.kdev@gmail.com> <julien.thierry@arm.com>
+Iskren Chernev <me@iskren.info> <iskren.chernev@gmail.com>
 Kalle Valo <kvalo@kernel.org> <kvalo@codeaurora.org>
 Kalyan Thota <quic_kalyant@quicinc.com> <kalyan_t@codeaurora.org>
 Kay Sievers <kay.sievers@vrfy.org>
diff --git a/Documentation/admin-guide/sysctl/kernel.rst b/Documentation/admin-guide/sysctl/kernel.rst
index 05e57c1cf937..39e7a2d46e1e 100644
--- a/Documentation/admin-guide/sysctl/kernel.rst
+++ b/Documentation/admin-guide/sysctl/kernel.rst
@@ -176,6 +176,7 @@ core_pattern
 	%f      	executable filename
 	%E		executable path
 	%c		maximum size of core file by resource limit RLIMIT_CORE
+	%C		CPU the task ran on
 	%<OTHER>	both are dropped
 	========	==========================================
 
diff --git a/Documentation/fault-injection/fault-injection.rst b/Documentation/fault-injection/fault-injection.rst
index 17779a2772e5..5f6454b9dbd4 100644
--- a/Documentation/fault-injection/fault-injection.rst
+++ b/Documentation/fault-injection/fault-injection.rst
@@ -83,9 +83,7 @@ configuration of fault-injection capabilities.
 - /sys/kernel/debug/fail*/times:
 
 	specifies how many times failures may happen at most. A value of -1
-	means "no limit". Note, though, that this file only accepts unsigned
-	values. So, if you want to specify -1, you better use 'printf' instead
-	of 'echo', e.g.: $ printf %#x -1 > times
+	means "no limit".
 
 - /sys/kernel/debug/fail*/space:
 
@@ -284,7 +282,7 @@ Application Examples
     echo Y > /sys/kernel/debug/$FAILTYPE/task-filter
     echo 10 > /sys/kernel/debug/$FAILTYPE/probability
     echo 100 > /sys/kernel/debug/$FAILTYPE/interval
-    printf %#x -1 > /sys/kernel/debug/$FAILTYPE/times
+    echo -1 > /sys/kernel/debug/$FAILTYPE/times
     echo 0 > /sys/kernel/debug/$FAILTYPE/space
     echo 2 > /sys/kernel/debug/$FAILTYPE/verbose
     echo Y > /sys/kernel/debug/$FAILTYPE/ignore-gfp-wait
@@ -338,7 +336,7 @@ Application Examples
     echo N > /sys/kernel/debug/$FAILTYPE/task-filter
     echo 10 > /sys/kernel/debug/$FAILTYPE/probability
     echo 100 > /sys/kernel/debug/$FAILTYPE/interval
-    printf %#x -1 > /sys/kernel/debug/$FAILTYPE/times
+    echo -1 > /sys/kernel/debug/$FAILTYPE/times
     echo 0 > /sys/kernel/debug/$FAILTYPE/space
     echo 2 > /sys/kernel/debug/$FAILTYPE/verbose
     echo Y > /sys/kernel/debug/$FAILTYPE/ignore-gfp-wait
@@ -369,7 +367,7 @@ Application Examples
     echo N > /sys/kernel/debug/$FAILTYPE/task-filter
     echo 100 > /sys/kernel/debug/$FAILTYPE/probability
     echo 0 > /sys/kernel/debug/$FAILTYPE/interval
-    printf %#x -1 > /sys/kernel/debug/$FAILTYPE/times
+    echo -1 > /sys/kernel/debug/$FAILTYPE/times
     echo 0 > /sys/kernel/debug/$FAILTYPE/space
     echo 1 > /sys/kernel/debug/$FAILTYPE/verbose
 
diff --git a/Documentation/filesystems/proc.rst b/Documentation/filesystems/proc.rst
index e98e0277f05e..f4ee84d7b351 100644
--- a/Documentation/filesystems/proc.rst
+++ b/Documentation/filesystems/proc.rst
@@ -47,6 +47,7 @@ fixes/update part 1.1  Stefani Seibold <stefani@seibold.net>    June 9 2009
   3.10  /proc/<pid>/timerslack_ns - Task timerslack value
   3.11	/proc/<pid>/patch_state - Livepatch patch operation state
   3.12	/proc/<pid>/arch_status - Task architecture specific information
+  3.13  /proc/<pid>/fd - List of symlinks to open files
 
   4	Configuring procfs
   4.1	Mount options
@@ -2150,6 +2151,22 @@ AVX512_elapsed_ms
   the task is unlikely an AVX512 user, but depends on the workload and the
   scheduling scenario, it also could be a false negative mentioned above.
 
+3.13 /proc/<pid>/fd - List of symlinks to open files
+-------------------------------------------------------
+This directory contains symbolic links which represent open files
+the process is maintaining.  Example output::
+
+  lr-x------ 1 root root 64 Sep 20 17:53 0 -> /dev/null
+  l-wx------ 1 root root 64 Sep 20 17:53 1 -> /dev/null
+  lrwx------ 1 root root 64 Sep 20 17:53 10 -> 'socket:[12539]'
+  lrwx------ 1 root root 64 Sep 20 17:53 11 -> 'socket:[12540]'
+  lrwx------ 1 root root 64 Sep 20 17:53 12 -> 'socket:[12542]'
+
+The number of open files for the process is stored in 'size' member
+of stat() output for /proc/<pid>/fd for fast access.
+-------------------------------------------------------
+
+
 Chapter 4: Configuring procfs
 =============================
 
diff --git a/MAINTAINERS b/MAINTAINERS
index 390bb1a5d86d..8f8c192e539e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -12126,7 +12126,7 @@ M:	Alexey Kodanev <alexey.kodanev@oracle.com>
 L:	ltp@lists.linux.it (subscribers-only)
 S:	Maintained
 W:	http://linux-test-project.github.io/
-T:	git git://github.com/linux-test-project/ltp.git
+T:	git https://github.com/linux-test-project/ltp.git
 
 LYNX 28G SERDES PHY DRIVER
 M:	Ioana Ciornei <ioana.ciornei@nxp.com>
diff --git a/arch/arc/kernel/ptrace.c b/arch/arc/kernel/ptrace.c
index da7542cea0d8..2abdcd9b09e8 100644
--- a/arch/arc/kernel/ptrace.c
+++ b/arch/arc/kernel/ptrace.c
@@ -185,7 +185,7 @@ static int genregs_set(struct task_struct *target,
 
 #define REG_IGNORE_ONE(LOC)		\
 	if (!ret)			\
-		ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, \
+		user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, \
 			offsetof(struct user_regs_struct, LOC), \
 			offsetof(struct user_regs_struct, LOC) + 4);
 
diff --git a/arch/arm/kernel/machine_kexec.c b/arch/arm/kernel/machine_kexec.c
index f567032a09c0..a2e9ac763a9f 100644
--- a/arch/arm/kernel/machine_kexec.c
+++ b/arch/arm/kernel/machine_kexec.c
@@ -73,7 +73,7 @@ void machine_kexec_cleanup(struct kimage *image)
 {
 }
 
-void machine_crash_nonpanic_core(void *unused)
+static void machine_crash_nonpanic_core(void *unused)
 {
 	struct pt_regs regs;
 
diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c
index bfe88c6e60d5..2d8e2516906b 100644
--- a/arch/arm/kernel/ptrace.c
+++ b/arch/arm/kernel/ptrace.c
@@ -651,11 +651,9 @@ static int vfp_set(struct task_struct *target,
 	if (ret)
 		return ret;
 
-	ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-				user_fpregs_offset + sizeof(new_vfp.fpregs),
-				user_fpscr_offset);
-	if (ret)
-		return ret;
+	user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+				  user_fpregs_offset + sizeof(new_vfp.fpregs),
+				  user_fpscr_offset);
 
 	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
 				 &new_vfp.fpscr,
diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c
index 979dbdc36d52..2686ab157601 100644
--- a/arch/arm64/kernel/ptrace.c
+++ b/arch/arm64/kernel/ptrace.c
@@ -514,9 +514,7 @@ static int hw_break_set(struct task_struct *target,
 
 	/* Resource info and pad */
 	offset = offsetof(struct user_hwdebug_state, dbg_regs);
-	ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, 0, offset);
-	if (ret)
-		return ret;
+	user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, 0, offset);
 
 	/* (address, ctrl) registers */
 	limit = regset->n * regset->size;
@@ -543,11 +541,8 @@ static int hw_break_set(struct task_struct *target,
 			return ret;
 		offset += PTRACE_HBP_CTRL_SZ;
 
-		ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-						offset,
-						offset + PTRACE_HBP_PAD_SZ);
-		if (ret)
-			return ret;
+		user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+					  offset, offset + PTRACE_HBP_PAD_SZ);
 		offset += PTRACE_HBP_PAD_SZ;
 		idx++;
 	}
@@ -955,10 +950,7 @@ static int sve_set_common(struct task_struct *target,
 
 	start = end;
 	end = SVE_PT_SVE_FPSR_OFFSET(vq);
-	ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-					start, end);
-	if (ret)
-		goto out;
+	user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, start, end);
 
 	/*
 	 * Copy fpsr, and fpcr which must follow contiguously in
diff --git a/arch/hexagon/kernel/ptrace.c b/arch/hexagon/kernel/ptrace.c
index 8975f9b4cedf..125f19995b76 100644
--- a/arch/hexagon/kernel/ptrace.c
+++ b/arch/hexagon/kernel/ptrace.c
@@ -115,10 +115,9 @@ static int genregs_set(struct task_struct *target,
 
 	/* Ignore the rest, if needed */
 	if (!ret)
-		ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-					offsetof(struct user_regs_struct, pad1), -1);
-
-	if (ret)
+		user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+			offsetof(struct user_regs_struct, pad1), -1);
+	else
 		return ret;
 
 	/*
diff --git a/arch/ia64/include/asm/io.h b/arch/ia64/include/asm/io.h
index ce66dfc0e719..83a492c8d298 100644
--- a/arch/ia64/include/asm/io.h
+++ b/arch/ia64/include/asm/io.h
@@ -23,10 +23,6 @@
 #include <asm/unaligned.h>
 #include <asm/early_ioremap.h>
 
-/* We don't use IO slowdowns on the ia64, but.. */
-#define __SLOW_DOWN_IO	do { } while (0)
-#define SLOW_DOWN_IO	do { } while (0)
-
 #define __IA64_UNCACHED_OFFSET	RGN_BASE(RGN_UNCACHED)
 
 /*
diff --git a/arch/ia64/include/asm/kprobes.h b/arch/ia64/include/asm/kprobes.h
index c5cf5e4fb338..9e956768946c 100644
--- a/arch/ia64/include/asm/kprobes.h
+++ b/arch/ia64/include/asm/kprobes.h
@@ -110,8 +110,6 @@ extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
 extern int kprobe_exceptions_notify(struct notifier_block *self,
 				    unsigned long val, void *data);
 
-extern void invalidate_stacked_regs(void);
-extern void flush_register_stack(void);
 extern void arch_remove_kprobe(struct kprobe *p);
 
 #endif /* CONFIG_KPROBES */
diff --git a/arch/ia64/kernel/ptrace.c b/arch/ia64/kernel/ptrace.c
index ab8aeb34d1d9..4c41912c550f 100644
--- a/arch/ia64/kernel/ptrace.c
+++ b/arch/ia64/kernel/ptrace.c
@@ -1481,12 +1481,10 @@ static void do_gpregs_set(struct unw_frame_info *info, void *arg)
 		return;
 	/* Skip r0 */
 	if (dst->pos < ELF_GR_OFFSET(1)) {
-		dst->ret = user_regset_copyin_ignore(&dst->pos, &dst->count,
-						       &dst->u.set.kbuf,
-						       &dst->u.set.ubuf,
-						       0, ELF_GR_OFFSET(1));
-		if (dst->ret)
-			return;
+		user_regset_copyin_ignore(&dst->pos, &dst->count,
+					  &dst->u.set.kbuf, &dst->u.set.ubuf,
+					  0, ELF_GR_OFFSET(1));
+		dst->ret = 0;
 	}
 
 	while (dst->count && dst->pos < ELF_AR_END_OFFSET) {
@@ -1560,11 +1558,11 @@ static void do_fpregs_set(struct unw_frame_info *info, void *arg)
 
 	/* Skip pos 0 and 1 */
 	if (dst->count > 0 && dst->pos < ELF_FP_OFFSET(2)) {
-		dst->ret = user_regset_copyin_ignore(&dst->pos, &dst->count,
-						       &dst->u.set.kbuf,
-						       &dst->u.set.ubuf,
-						       0, ELF_FP_OFFSET(2));
-		if (dst->count == 0 || dst->ret)
+		user_regset_copyin_ignore(&dst->pos, &dst->count,
+					  &dst->u.set.kbuf, &dst->u.set.ubuf,
+					  0, ELF_FP_OFFSET(2));
+		dst->ret = 0;
+		if (dst->count == 0)
 			return;
 	}
 
diff --git a/arch/ia64/kernel/sys_ia64.c b/arch/ia64/kernel/sys_ia64.c
index 215bf3f8cb20..f6a502e8f02c 100644
--- a/arch/ia64/kernel/sys_ia64.c
+++ b/arch/ia64/kernel/sys_ia64.c
@@ -140,7 +140,7 @@ asmlinkage unsigned long
 sys_mmap2 (unsigned long addr, unsigned long len, int prot, int flags, int fd, long pgoff)
 {
 	addr = ksys_mmap_pgoff(addr, len, prot, flags, fd, pgoff);
-	if (!IS_ERR((void *) addr))
+	if (!IS_ERR_VALUE(addr))
 		force_successful_syscall_return();
 	return addr;
 }
@@ -152,7 +152,7 @@ sys_mmap (unsigned long addr, unsigned long len, int prot, int flags, int fd, lo
 		return -EINVAL;
 
 	addr = ksys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
-	if (!IS_ERR((void *) addr))
+	if (!IS_ERR_VALUE(addr))
 		force_successful_syscall_return();
 	return addr;
 }
@@ -162,7 +162,7 @@ ia64_mremap (unsigned long addr, unsigned long old_len, unsigned long new_len, u
 	     unsigned long new_addr)
 {
 	addr = sys_mremap(addr, old_len, new_len, flags, new_addr);
-	if (!IS_ERR((void *) addr))
+	if (!IS_ERR_VALUE(addr))
 		force_successful_syscall_return();
 	return addr;
 }
diff --git a/arch/mips/kernel/ptrace.c b/arch/mips/kernel/ptrace.c
index 567aec4abac0..d9df543f7e2c 100644
--- a/arch/mips/kernel/ptrace.c
+++ b/arch/mips/kernel/ptrace.c
@@ -531,10 +531,11 @@ static int fpr_set(struct task_struct *target,
 		ptrace_setfcr31(target, fcr31);
 	}
 
-	if (count > 0)
-		err = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-						fir_pos,
-						fir_pos + sizeof(u32));
+	if (count > 0) {
+		user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+					  fir_pos, fir_pos + sizeof(u32));
+		return 0;
+	}
 
 	return err;
 }
diff --git a/arch/nios2/kernel/ptrace.c b/arch/nios2/kernel/ptrace.c
index cd62f310778b..9221c15972e6 100644
--- a/arch/nios2/kernel/ptrace.c
+++ b/arch/nios2/kernel/ptrace.c
@@ -54,7 +54,7 @@ static int genregs_set(struct task_struct *target,
 
 #define REG_IGNORE_RANGE(START, END)		\
 	if (!ret)					\
-		ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, \
+		user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, \
 			START * 4, (END * 4) + 4);
 
 #define REG_IN_ONE(PTR, LOC)	\
@@ -80,8 +80,8 @@ static int genregs_set(struct task_struct *target,
 	REG_IN_ONE(&regs->ra, PTR_RA);
 	REG_IN_ONE(&regs->ea, PTR_PC); /* use ea for PC */
 	if (!ret)
-		ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-					 PTR_STATUS * 4, -1);
+		user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+					  PTR_STATUS * 4, -1);
 
 	return ret;
 }
diff --git a/arch/openrisc/kernel/ptrace.c b/arch/openrisc/kernel/ptrace.c
index b971740fc2aa..85ace93fc251 100644
--- a/arch/openrisc/kernel/ptrace.c
+++ b/arch/openrisc/kernel/ptrace.c
@@ -66,10 +66,9 @@ static int genregs_set(struct task_struct *target,
 	int ret;
 
 	/* ignore r0 */
-	ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, 0, 4);
+	user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, 0, 4);
 	/* r1 - r31 */
-	if (!ret)
-		ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
 					 regs->gpr+1, 4, 4*32);
 	/* PC */
 	if (!ret)
@@ -80,8 +79,7 @@ static int genregs_set(struct task_struct *target,
 	 * the Supervision register
 	 */
 	if (!ret)
-		ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-						4*33, -1);
+		user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, 4*33, -1);
 
 	return ret;
 }
diff --git a/arch/parisc/kernel/ptrace.c b/arch/parisc/kernel/ptrace.c
index 96ef6a6b66e5..69c62933e952 100644
--- a/arch/parisc/kernel/ptrace.c
+++ b/arch/parisc/kernel/ptrace.c
@@ -424,8 +424,9 @@ static int fpr_set(struct task_struct *target,
 	ubuf = u;
 	pos *= sizeof(reg);
 	count *= sizeof(reg);
-	return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-					 ELF_NFPREG * sizeof(reg), -1);
+	user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+				  ELF_NFPREG * sizeof(reg), -1);
+	return 0;
 }
 
 #define RI(reg) (offsetof(struct user_regs_struct,reg) / sizeof(long))
@@ -543,8 +544,9 @@ static int gpr_set(struct task_struct *target,
 	ubuf = u;
 	pos *= sizeof(reg);
 	count *= sizeof(reg);
-	return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-					 ELF_NGREG * sizeof(reg), -1);
+	user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+				  ELF_NGREG * sizeof(reg), -1);
+	return 0;
 }
 
 static const struct user_regset native_regsets[] = {
@@ -606,8 +608,9 @@ static int gpr32_set(struct task_struct *target,
 	ubuf = u;
 	pos *= sizeof(reg);
 	count *= sizeof(reg);
-	return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-					 ELF_NGREG * sizeof(reg), -1);
+	user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+				  ELF_NGREG * sizeof(reg), -1);
+	return 0;
 }
 
 /*
diff --git a/arch/powerpc/kernel/ptrace/ptrace-tm.c b/arch/powerpc/kernel/ptrace/ptrace-tm.c
index 44045363a903..210ea834e603 100644
--- a/arch/powerpc/kernel/ptrace/ptrace-tm.c
+++ b/arch/powerpc/kernel/ptrace/ptrace-tm.c
@@ -170,9 +170,9 @@ int tm_cgpr_set(struct task_struct *target, const struct user_regset *regset,
 					 (PT_MAX_PUT_REG + 1) * sizeof(reg));
 
 	if (PT_MAX_PUT_REG + 1 < PT_TRAP && !ret)
-		ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-						(PT_MAX_PUT_REG + 1) * sizeof(reg),
-						PT_TRAP * sizeof(reg));
+		user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+					  (PT_MAX_PUT_REG + 1) * sizeof(reg),
+					  PT_TRAP * sizeof(reg));
 
 	if (!ret && count > 0) {
 		ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &reg,
@@ -183,8 +183,8 @@ int tm_cgpr_set(struct task_struct *target, const struct user_regset *regset,
 	}
 
 	if (!ret)
-		ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-						(PT_TRAP + 1) * sizeof(reg), -1);
+		user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+					  (PT_TRAP + 1) * sizeof(reg), -1);
 
 	return ret;
 }
diff --git a/arch/powerpc/kernel/ptrace/ptrace-view.c b/arch/powerpc/kernel/ptrace/ptrace-view.c
index 076d867412c7..2087a785f05f 100644
--- a/arch/powerpc/kernel/ptrace/ptrace-view.c
+++ b/arch/powerpc/kernel/ptrace/ptrace-view.c
@@ -267,9 +267,9 @@ static int gpr_set(struct task_struct *target, const struct user_regset *regset,
 					 (PT_MAX_PUT_REG + 1) * sizeof(reg));
 
 	if (PT_MAX_PUT_REG + 1 < PT_TRAP && !ret)
-		ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-						(PT_MAX_PUT_REG + 1) * sizeof(reg),
-						PT_TRAP * sizeof(reg));
+		user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+					  (PT_MAX_PUT_REG + 1) * sizeof(reg),
+					  PT_TRAP * sizeof(reg));
 
 	if (!ret && count > 0) {
 		ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &reg,
@@ -280,8 +280,8 @@ static int gpr_set(struct task_struct *target, const struct user_regset *regset,
 	}
 
 	if (!ret)
-		ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-						(PT_TRAP + 1) * sizeof(reg), -1);
+		user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+					  (PT_TRAP + 1) * sizeof(reg), -1);
 
 	return ret;
 }
@@ -706,8 +706,9 @@ int gpr32_set_common(struct task_struct *target,
 	ubuf = u;
 	pos *= sizeof(reg);
 	count *= sizeof(reg);
-	return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-					 (PT_TRAP + 1) * sizeof(reg), -1);
+	user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+				  (PT_TRAP + 1) * sizeof(reg), -1);
+	return 0;
 
 Efault:
 	user_read_access_end();
diff --git a/arch/powerpc/kexec/file_load_64.c b/arch/powerpc/kexec/file_load_64.c
index 349a781cea0b..60e12b716d3c 100644
--- a/arch/powerpc/kexec/file_load_64.c
+++ b/arch/powerpc/kexec/file_load_64.c
@@ -35,7 +35,7 @@ struct umem_info {
 
 	/* usable memory ranges to look up */
 	unsigned int nr_ranges;
-	const struct crash_mem_range *ranges;
+	const struct range *ranges;
 };
 
 const struct kexec_file_ops * const kexec_file_loaders[] = {
diff --git a/arch/powerpc/kexec/ranges.c b/arch/powerpc/kexec/ranges.c
index 563e9989a5bf..5fc53a5fcfdf 100644
--- a/arch/powerpc/kexec/ranges.c
+++ b/arch/powerpc/kexec/ranges.c
@@ -33,7 +33,7 @@
 static inline unsigned int get_max_nr_ranges(size_t size)
 {
 	return ((size - sizeof(struct crash_mem)) /
-		sizeof(struct crash_mem_range));
+		sizeof(struct range));
 }
 
 /**
@@ -51,7 +51,7 @@ static inline size_t get_mem_rngs_size(struct crash_mem *mem_rngs)
 		return 0;
 
 	size = (sizeof(struct crash_mem) +
-		(mem_rngs->max_nr_ranges * sizeof(struct crash_mem_range)));
+		(mem_rngs->max_nr_ranges * sizeof(struct range)));
 
 	/*
 	 * Memory is allocated in size multiple of MEM_RANGE_CHUNK_SZ.
@@ -98,7 +98,7 @@ static int __add_mem_range(struct crash_mem **mem_ranges, u64 base, u64 size)
  */
 static void __merge_memory_ranges(struct crash_mem *mem_rngs)
 {
-	struct crash_mem_range *ranges;
+	struct range *ranges;
 	int i, idx;
 
 	if (!mem_rngs)
@@ -123,7 +123,7 @@ static void __merge_memory_ranges(struct crash_mem *mem_rngs)
 /* cmp_func_t callback to sort ranges with sort() */
 static int rngcmp(const void *_x, const void *_y)
 {
-	const struct crash_mem_range *x = _x, *y = _y;
+	const struct range *x = _x, *y = _y;
 
 	if (x->start > y->start)
 		return 1;
diff --git a/arch/sh/kernel/ptrace_32.c b/arch/sh/kernel/ptrace_32.c
index d417988d9770..36f50ad81e83 100644
--- a/arch/sh/kernel/ptrace_32.c
+++ b/arch/sh/kernel/ptrace_32.c
@@ -157,8 +157,8 @@ static int genregs_set(struct task_struct *target,
 					 offsetof(struct pt_regs, pc),
 					 sizeof(struct pt_regs));
 	if (!ret)
-		ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-						sizeof(struct pt_regs), -1);
+		user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+					  sizeof(struct pt_regs), -1);
 
 	return ret;
 }
@@ -229,8 +229,8 @@ static int dspregs_set(struct task_struct *target,
 	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, regs,
 				 0, sizeof(struct pt_dspregs));
 	if (!ret)
-		ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-						sizeof(struct pt_dspregs), -1);
+		user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+					  sizeof(struct pt_dspregs), -1);
 
 	return ret;
 }
diff --git a/arch/sparc/kernel/ptrace_32.c b/arch/sparc/kernel/ptrace_32.c
index e7db48acb838..c273ccebea46 100644
--- a/arch/sparc/kernel/ptrace_32.c
+++ b/arch/sparc/kernel/ptrace_32.c
@@ -158,8 +158,9 @@ static int genregs32_set(struct task_struct *target,
 				 35 * sizeof(u32), 36 * sizeof(u32));
 	if (ret || !count)
 		return ret;
-	return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-					 36 * sizeof(u32), 38 * sizeof(u32));
+	user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, 36 * sizeof(u32),
+				  38 * sizeof(u32));
+	return 0;
 }
 
 static int fpregs32_get(struct task_struct *target,
@@ -203,8 +204,8 @@ static int fpregs32_set(struct task_struct *target,
 					 33 * sizeof(u32),
 					 34 * sizeof(u32));
 	if (!ret)
-		ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-						34 * sizeof(u32), -1);
+		user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+					  34 * sizeof(u32), -1);
 	return ret;
 }
 
diff --git a/arch/sparc/kernel/ptrace_64.c b/arch/sparc/kernel/ptrace_64.c
index 86a7eb5c27ba..4deba5b6eddb 100644
--- a/arch/sparc/kernel/ptrace_64.c
+++ b/arch/sparc/kernel/ptrace_64.c
@@ -332,8 +332,8 @@ static int genregs64_set(struct task_struct *target,
 	}
 
 	if (!ret)
-		ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-						36 * sizeof(u64), -1);
+		user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+					  36 * sizeof(u64), -1);
 
 	return ret;
 }
@@ -406,8 +406,8 @@ static int fpregs64_set(struct task_struct *target,
 	task_thread_info(target)->fpsaved[0] = fprs;
 
 	if (!ret)
-		ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-						35 * sizeof(u64), -1);
+		user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+					  35 * sizeof(u64), -1);
 	return ret;
 }
 
@@ -473,10 +473,8 @@ static int setregs64_set(struct task_struct *target,
 				 15 * sizeof(u64));
 	if (ret)
 		return ret;
-	ret =user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-				 15 * sizeof(u64), 16 * sizeof(u64));
-	if (ret)
-		return ret;
+	user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+				  15 * sizeof(u64), 16 * sizeof(u64));
 	/* TSTATE */
 	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
 				 &tstate,
@@ -670,8 +668,9 @@ finish:
 	pos *= sizeof(reg);
 	count *= sizeof(reg);
 
-	return user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-					 38 * sizeof(reg), -1);
+	user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+				  38 * sizeof(reg), -1);
+	return 0;
 }
 
 static int fpregs32_get(struct task_struct *target,
@@ -737,8 +736,8 @@ static int fpregs32_set(struct task_struct *target,
 	task_thread_info(target)->fpsaved[0] = fprs;
 
 	if (!ret)
-		ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
-						34 * sizeof(u32), -1);
+		user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf,
+					  34 * sizeof(u32), -1);
 	return ret;
 }
 
diff --git a/drivers/rapidio/devices/rio_mport_cdev.c b/drivers/rapidio/devices/rio_mport_cdev.c
index 2cdc054e53a5..43db495f1986 100644
--- a/drivers/rapidio/devices/rio_mport_cdev.c
+++ b/drivers/rapidio/devices/rio_mport_cdev.c
@@ -1804,8 +1804,11 @@ static int rio_mport_add_riodev(struct mport_cdev_priv *priv,
 		rio_init_dbell_res(&rdev->riores[RIO_DOORBELL_RESOURCE],
 				   0, 0xffff);
 	err = rio_add_device(rdev);
-	if (err)
-		goto cleanup;
+	if (err) {
+		put_device(&rdev->dev);
+		return err;
+	}
+
 	rio_dev_get(rdev);
 
 	return 0;
@@ -1901,10 +1904,6 @@ static int mport_cdev_open(struct inode *inode, struct file *filp)
 
 	priv->md = chdev;
 
-	mutex_lock(&chdev->file_mutex);
-	list_add_tail(&priv->list, &chdev->file_list);
-	mutex_unlock(&chdev->file_mutex);
-
 	INIT_LIST_HEAD(&priv->db_filters);
 	INIT_LIST_HEAD(&priv->pw_filters);
 	spin_lock_init(&priv->fifo_lock);
@@ -1913,6 +1912,7 @@ static int mport_cdev_open(struct inode *inode, struct file *filp)
 			  sizeof(struct rio_event) * MPORT_EVENT_DEPTH,
 			  GFP_KERNEL);
 	if (ret < 0) {
+		put_device(&chdev->dev);
 		dev_err(&chdev->dev, DRV_NAME ": kfifo_alloc failed\n");
 		ret = -ENOMEM;
 		goto err_fifo;
@@ -1923,6 +1923,9 @@ static int mport_cdev_open(struct inode *inode, struct file *filp)
 	spin_lock_init(&priv->req_lock);
 	mutex_init(&priv->dma_lock);
 #endif
+	mutex_lock(&chdev->file_mutex);
+	list_add_tail(&priv->list, &chdev->file_list);
+	mutex_unlock(&chdev->file_mutex);
 
 	filp->private_data = priv;
 	goto out;
diff --git a/drivers/rapidio/devices/tsi721.c b/drivers/rapidio/devices/tsi721.c
index b3134744fb55..0a42d6a2af24 100644
--- a/drivers/rapidio/devices/tsi721.c
+++ b/drivers/rapidio/devices/tsi721.c
@@ -2941,7 +2941,8 @@ static void tsi721_remove(struct pci_dev *pdev)
 
 	tsi721_disable_ints(priv);
 	tsi721_free_irq(priv);
-	flush_scheduled_work();
+	flush_work(&priv->idb_work);
+	flush_work(&priv->pw_work);
 	rio_unregister_mport(&priv->mport);
 
 	tsi721_unregister_dma(priv);
diff --git a/drivers/rapidio/rio-scan.c b/drivers/rapidio/rio-scan.c
index 19b0c33f4a62..fdcf742b2adb 100644
--- a/drivers/rapidio/rio-scan.c
+++ b/drivers/rapidio/rio-scan.c
@@ -454,8 +454,12 @@ static struct rio_dev *rio_setup_device(struct rio_net *net,
 				   0, 0xffff);
 
 	ret = rio_add_device(rdev);
-	if (ret)
-		goto cleanup;
+	if (ret) {
+		if (rswitch)
+			kfree(rswitch->route_table);
+		put_device(&rdev->dev);
+		return NULL;
+	}
 
 	rio_dev_get(rdev);
 
diff --git a/drivers/rapidio/rio.c b/drivers/rapidio/rio.c
index e74cf09eeff0..9544b8ee0c96 100644
--- a/drivers/rapidio/rio.c
+++ b/drivers/rapidio/rio.c
@@ -2186,11 +2186,16 @@ int rio_register_mport(struct rio_mport *port)
 	atomic_set(&port->state, RIO_DEVICE_RUNNING);
 
 	res = device_register(&port->dev);
-	if (res)
+	if (res) {
 		dev_err(&port->dev, "RIO: mport%d registration failed ERR=%d\n",
 			port->id, res);
-	else
+		mutex_lock(&rio_mport_list_lock);
+		list_del(&port->node);
+		mutex_unlock(&rio_mport_list_lock);
+		put_device(&port->dev);
+	} else {
 		dev_dbg(&port->dev, "RIO: registered mport%d\n", port->id);
+	}
 
 	return res;
 }
diff --git a/fs/coredump.c b/fs/coredump.c
index 7bad7785e8e6..3e8630c8d627 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -325,6 +325,10 @@ static int format_corename(struct core_name *cn, struct coredump_params *cprm,
 				err = cn_printf(cn, "%lu",
 					      rlimit(RLIMIT_CORE));
 				break;
+			/* CPU the task ran on */
+			case 'C':
+				err = cn_printf(cn, "%d", cprm->cpu);
+				break;
 			default:
 				break;
 			}
@@ -534,6 +538,7 @@ void do_coredump(const kernel_siginfo_t *siginfo)
 		 */
 		.mm_flags = mm->flags,
 		.vma_meta = NULL,
+		.cpu = raw_smp_processor_id(),
 	};
 
 	audit_core_dumps(siginfo->si_signo);
diff --git a/fs/debugfs/file.c b/fs/debugfs/file.c
index ddb3fc258df9..b54f470e0d03 100644
--- a/fs/debugfs/file.c
+++ b/fs/debugfs/file.c
@@ -378,8 +378,8 @@ ssize_t debugfs_attr_read(struct file *file, char __user *buf,
 }
 EXPORT_SYMBOL_GPL(debugfs_attr_read);
 
-ssize_t debugfs_attr_write(struct file *file, const char __user *buf,
-			 size_t len, loff_t *ppos)
+static ssize_t debugfs_attr_write_xsigned(struct file *file, const char __user *buf,
+			 size_t len, loff_t *ppos, bool is_signed)
 {
 	struct dentry *dentry = F_DENTRY(file);
 	ssize_t ret;
@@ -387,12 +387,28 @@ ssize_t debugfs_attr_write(struct file *file, const char __user *buf,
 	ret = debugfs_file_get(dentry);
 	if (unlikely(ret))
 		return ret;
-	ret = simple_attr_write(file, buf, len, ppos);
+	if (is_signed)
+		ret = simple_attr_write_signed(file, buf, len, ppos);
+	else
+		ret = simple_attr_write(file, buf, len, ppos);
 	debugfs_file_put(dentry);
 	return ret;
 }
+
+ssize_t debugfs_attr_write(struct file *file, const char __user *buf,
+			 size_t len, loff_t *ppos)
+{
+	return debugfs_attr_write_xsigned(file, buf, len, ppos, false);
+}
 EXPORT_SYMBOL_GPL(debugfs_attr_write);
 
+ssize_t debugfs_attr_write_signed(struct file *file, const char __user *buf,
+			 size_t len, loff_t *ppos)
+{
+	return debugfs_attr_write_xsigned(file, buf, len, ppos, true);
+}
+EXPORT_SYMBOL_GPL(debugfs_attr_write_signed);
+
 static struct dentry *debugfs_create_mode_unsafe(const char *name, umode_t mode,
 					struct dentry *parent, void *value,
 					const struct file_operations *fops,
@@ -738,11 +754,11 @@ static int debugfs_atomic_t_get(void *data, u64 *val)
 	*val = atomic_read((atomic_t *)data);
 	return 0;
 }
-DEFINE_DEBUGFS_ATTRIBUTE(fops_atomic_t, debugfs_atomic_t_get,
+DEFINE_DEBUGFS_ATTRIBUTE_SIGNED(fops_atomic_t, debugfs_atomic_t_get,
 			debugfs_atomic_t_set, "%lld\n");
-DEFINE_DEBUGFS_ATTRIBUTE(fops_atomic_t_ro, debugfs_atomic_t_get, NULL,
+DEFINE_DEBUGFS_ATTRIBUTE_SIGNED(fops_atomic_t_ro, debugfs_atomic_t_get, NULL,
 			"%lld\n");
-DEFINE_DEBUGFS_ATTRIBUTE(fops_atomic_t_wo, NULL, debugfs_atomic_t_set,
+DEFINE_DEBUGFS_ATTRIBUTE_SIGNED(fops_atomic_t_wo, NULL, debugfs_atomic_t_set,
 			"%lld\n");
 
 /**
diff --git a/fs/fat/nfs.c b/fs/fat/nfs.c
index af191371c352..3626eb585a98 100644
--- a/fs/fat/nfs.c
+++ b/fs/fat/nfs.c
@@ -17,7 +17,7 @@ struct fat_fid {
 #define FAT_FID_SIZE_WITHOUT_PARENT 3
 #define FAT_FID_SIZE_WITH_PARENT (sizeof(struct fat_fid)/sizeof(u32))
 
-/**
+/*
  * Look up a directory inode given its starting cluster.
  */
 static struct inode *fat_dget(struct super_block *sb, int i_logstart)
@@ -135,7 +135,7 @@ fat_encode_fh_nostale(struct inode *inode, __u32 *fh, int *lenp,
 	return type;
 }
 
-/**
+/*
  * Map a NFS file handle to a corresponding dentry.
  * The dentry may or may not be connected to the filesystem root.
  */
diff --git a/fs/hfs/inode.c b/fs/hfs/inode.c
index c4526f16355d..a0746be3c1de 100644
--- a/fs/hfs/inode.c
+++ b/fs/hfs/inode.c
@@ -458,6 +458,8 @@ int hfs_write_inode(struct inode *inode, struct writeback_control *wbc)
 		/* panic? */
 		return -EIO;
 
+	if (HFS_I(main_inode)->cat_key.CName.len > HFS_NAMELEN)
+		return -EIO;
 	fd.search_key->cat = HFS_I(main_inode)->cat_key;
 	if (hfs_brec_find(&fd))
 		/* panic? */
diff --git a/fs/hfs/trans.c b/fs/hfs/trans.c
index 39f5e343bf4d..fdb0edb8a607 100644
--- a/fs/hfs/trans.c
+++ b/fs/hfs/trans.c
@@ -109,7 +109,7 @@ void hfs_asc2mac(struct super_block *sb, struct hfs_name *out, const struct qstr
 	if (nls_io) {
 		wchar_t ch;
 
-		while (srclen > 0) {
+		while (srclen > 0 && dstlen > 0) {
 			size = nls_io->char2uni(src, srclen, &ch);
 			if (size < 0) {
 				ch = '?';
diff --git a/fs/hfsplus/hfsplus_fs.h b/fs/hfsplus/hfsplus_fs.h
index a5db2e3b2980..6aa919e59483 100644
--- a/fs/hfsplus/hfsplus_fs.h
+++ b/fs/hfsplus/hfsplus_fs.h
@@ -198,6 +198,8 @@ struct hfsplus_sb_info {
 #define HFSPLUS_SB_HFSX		3
 #define HFSPLUS_SB_CASEFOLD	4
 #define HFSPLUS_SB_NOBARRIER	5
+#define HFSPLUS_SB_UID		6
+#define HFSPLUS_SB_GID		7
 
 static inline struct hfsplus_sb_info *HFSPLUS_SB(struct super_block *sb)
 {
diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index aeab83ed1c9c..b675581aa9d0 100644
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -192,11 +192,11 @@ static void hfsplus_get_perms(struct inode *inode,
 	mode = be16_to_cpu(perms->mode);
 
 	i_uid_write(inode, be32_to_cpu(perms->owner));
-	if (!i_uid_read(inode) && !mode)
+	if ((test_bit(HFSPLUS_SB_UID, &sbi->flags)) || (!i_uid_read(inode) && !mode))
 		inode->i_uid = sbi->uid;
 
 	i_gid_write(inode, be32_to_cpu(perms->group));
-	if (!i_gid_read(inode) && !mode)
+	if ((test_bit(HFSPLUS_SB_GID, &sbi->flags)) || (!i_gid_read(inode) && !mode))
 		inode->i_gid = sbi->gid;
 
 	if (dir) {
diff --git a/fs/hfsplus/options.c b/fs/hfsplus/options.c
index 047e05c57560..c94a58762ad6 100644
--- a/fs/hfsplus/options.c
+++ b/fs/hfsplus/options.c
@@ -140,6 +140,8 @@ int hfsplus_parse_options(char *input, struct hfsplus_sb_info *sbi)
 			if (!uid_valid(sbi->uid)) {
 				pr_err("invalid uid specified\n");
 				return 0;
+			} else {
+				set_bit(HFSPLUS_SB_UID, &sbi->flags);
 			}
 			break;
 		case opt_gid:
@@ -151,6 +153,8 @@ int hfsplus_parse_options(char *input, struct hfsplus_sb_info *sbi)
 			if (!gid_valid(sbi->gid)) {
 				pr_err("invalid gid specified\n");
 				return 0;
+			} else {
+				set_bit(HFSPLUS_SB_GID, &sbi->flags);
 			}
 			break;
 		case opt_part:
diff --git a/fs/libfs.c b/fs/libfs.c
index 682d56345a1c..aada4e7c8713 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -995,8 +995,8 @@ out:
 EXPORT_SYMBOL_GPL(simple_attr_read);
 
 /* interpret the buffer as a number to call the set function with */
-ssize_t simple_attr_write(struct file *file, const char __user *buf,
-			  size_t len, loff_t *ppos)
+static ssize_t simple_attr_write_xsigned(struct file *file, const char __user *buf,
+			  size_t len, loff_t *ppos, bool is_signed)
 {
 	struct simple_attr *attr;
 	unsigned long long val;
@@ -1017,7 +1017,10 @@ ssize_t simple_attr_write(struct file *file, const char __user *buf,
 		goto out;
 
 	attr->set_buf[size] = '\0';
-	ret = kstrtoull(attr->set_buf, 0, &val);
+	if (is_signed)
+		ret = kstrtoll(attr->set_buf, 0, &val);
+	else
+		ret = kstrtoull(attr->set_buf, 0, &val);
 	if (ret)
 		goto out;
 	ret = attr->set(attr->data, val);
@@ -1027,8 +1030,21 @@ out:
 	mutex_unlock(&attr->mutex);
 	return ret;
 }
+
+ssize_t simple_attr_write(struct file *file, const char __user *buf,
+			  size_t len, loff_t *ppos)
+{
+	return simple_attr_write_xsigned(file, buf, len, ppos, false);
+}
 EXPORT_SYMBOL_GPL(simple_attr_write);
 
+ssize_t simple_attr_write_signed(struct file *file, const char __user *buf,
+			  size_t len, loff_t *ppos)
+{
+	return simple_attr_write_xsigned(file, buf, len, ppos, true);
+}
+EXPORT_SYMBOL_GPL(simple_attr_write_signed);
+
 /**
  * generic_fh_to_dentry - generic helper for the fh_to_dentry export operation
  * @sb:		filesystem to do the file handle conversion on
diff --git a/fs/nilfs2/the_nilfs.c b/fs/nilfs2/the_nilfs.c
index c8b89b4f94e0..2064e6473d30 100644
--- a/fs/nilfs2/the_nilfs.c
+++ b/fs/nilfs2/the_nilfs.c
@@ -13,6 +13,7 @@
 #include <linux/blkdev.h>
 #include <linux/backing-dev.h>
 #include <linux/random.h>
+#include <linux/log2.h>
 #include <linux/crc32.h>
 #include "nilfs.h"
 #include "segment.h"
@@ -193,6 +194,34 @@ static int nilfs_store_log_cursor(struct the_nilfs *nilfs,
 }
 
 /**
+ * nilfs_get_blocksize - get block size from raw superblock data
+ * @sb: super block instance
+ * @sbp: superblock raw data buffer
+ * @blocksize: place to store block size
+ *
+ * nilfs_get_blocksize() calculates the block size from the block size
+ * exponent information written in @sbp and stores it in @blocksize,
+ * or aborts with an error message if it's too large.
+ *
+ * Return Value: On success, 0 is returned. If the block size is too
+ * large, -EINVAL is returned.
+ */
+static int nilfs_get_blocksize(struct super_block *sb,
+			       struct nilfs_super_block *sbp, int *blocksize)
+{
+	unsigned int shift_bits = le32_to_cpu(sbp->s_log_block_size);
+
+	if (unlikely(shift_bits >
+		     ilog2(NILFS_MAX_BLOCK_SIZE) - BLOCK_SIZE_BITS)) {
+		nilfs_err(sb, "too large filesystem blocksize: 2 ^ %u KiB",
+			  shift_bits);
+		return -EINVAL;
+	}
+	*blocksize = BLOCK_SIZE << shift_bits;
+	return 0;
+}
+
+/**
  * load_nilfs - load and recover the nilfs
  * @nilfs: the_nilfs structure to be released
  * @sb: super block instance used to recover past segment
@@ -245,11 +274,15 @@ int load_nilfs(struct the_nilfs *nilfs, struct super_block *sb)
 		nilfs->ns_sbwtime = le64_to_cpu(sbp[0]->s_wtime);
 
 		/* verify consistency between two super blocks */
-		blocksize = BLOCK_SIZE << le32_to_cpu(sbp[0]->s_log_block_size);
+		err = nilfs_get_blocksize(sb, sbp[0], &blocksize);
+		if (err)
+			goto scan_error;
+
 		if (blocksize != nilfs->ns_blocksize) {
 			nilfs_warn(sb,
 				   "blocksize differs between two super blocks (%d != %d)",
 				   blocksize, nilfs->ns_blocksize);
+			err = -EINVAL;
 			goto scan_error;
 		}
 
@@ -443,11 +476,33 @@ static int nilfs_valid_sb(struct nilfs_super_block *sbp)
 	return crc == le32_to_cpu(sbp->s_sum);
 }
 
-static int nilfs_sb2_bad_offset(struct nilfs_super_block *sbp, u64 offset)
+/**
+ * nilfs_sb2_bad_offset - check the location of the second superblock
+ * @sbp: superblock raw data buffer
+ * @offset: byte offset of second superblock calculated from device size
+ *
+ * nilfs_sb2_bad_offset() checks if the position on the second
+ * superblock is valid or not based on the filesystem parameters
+ * stored in @sbp.  If @offset points to a location within the segment
+ * area, or if the parameters themselves are not normal, it is
+ * determined to be invalid.
+ *
+ * Return Value: true if invalid, false if valid.
+ */
+static bool nilfs_sb2_bad_offset(struct nilfs_super_block *sbp, u64 offset)
 {
-	return offset < ((le64_to_cpu(sbp->s_nsegments) *
-			  le32_to_cpu(sbp->s_blocks_per_segment)) <<
-			 (le32_to_cpu(sbp->s_log_block_size) + 10));
+	unsigned int shift_bits = le32_to_cpu(sbp->s_log_block_size);
+	u32 blocks_per_segment = le32_to_cpu(sbp->s_blocks_per_segment);
+	u64 nsegments = le64_to_cpu(sbp->s_nsegments);
+	u64 index;
+
+	if (blocks_per_segment < NILFS_SEG_MIN_BLOCKS ||
+	    shift_bits > ilog2(NILFS_MAX_BLOCK_SIZE) - BLOCK_SIZE_BITS)
+		return true;
+
+	index = offset >> (shift_bits + BLOCK_SIZE_BITS);
+	do_div(index, blocks_per_segment);
+	return index < nsegments;
 }
 
 static void nilfs_release_super_block(struct the_nilfs *nilfs)
@@ -586,9 +641,11 @@ int init_nilfs(struct the_nilfs *nilfs, struct super_block *sb, char *data)
 	if (err)
 		goto failed_sbh;
 
-	blocksize = BLOCK_SIZE << le32_to_cpu(sbp->s_log_block_size);
-	if (blocksize < NILFS_MIN_BLOCK_SIZE ||
-	    blocksize > NILFS_MAX_BLOCK_SIZE) {
+	err = nilfs_get_blocksize(sb, sbp, &blocksize);
+	if (err)
+		goto failed_sbh;
+
+	if (blocksize < NILFS_MIN_BLOCK_SIZE) {
 		nilfs_err(sb,
 			  "couldn't mount because of unsupported filesystem blocksize %d",
 			  blocksize);
diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c
index b13d344d40b6..60b97c92e2b2 100644
--- a/fs/ocfs2/cluster/heartbeat.c
+++ b/fs/ocfs2/cluster/heartbeat.c
@@ -335,7 +335,7 @@ static void o2hb_arm_timeout(struct o2hb_region *reg)
 	/* negotiate timeout must be less than write timeout. */
 	schedule_delayed_work(&reg->hr_nego_timeout_work,
 			      msecs_to_jiffies(O2HB_NEGO_TIMEOUT_MS));
-	memset(reg->hr_nego_node_bitmap, 0, sizeof(reg->hr_nego_node_bitmap));
+	bitmap_zero(reg->hr_nego_node_bitmap, O2NM_MAX_NODES);
 }
 
 static void o2hb_disarm_timeout(struct o2hb_region *reg)
@@ -375,7 +375,7 @@ static void o2hb_nego_timeout(struct work_struct *work)
 	if (reg->hr_last_hb_status)
 		return;
 
-	o2hb_fill_node_map(live_node_bitmap, sizeof(live_node_bitmap));
+	o2hb_fill_node_map(live_node_bitmap, O2NM_MAX_NODES);
 	/* lowest node as master node to make negotiate decision. */
 	master_node = find_first_bit(live_node_bitmap, O2NM_MAX_NODES);
 
@@ -386,8 +386,8 @@ static void o2hb_nego_timeout(struct work_struct *work)
 				config_item_name(&reg->hr_item), reg->hr_bdev);
 			set_bit(master_node, reg->hr_nego_node_bitmap);
 		}
-		if (memcmp(reg->hr_nego_node_bitmap, live_node_bitmap,
-				sizeof(reg->hr_nego_node_bitmap))) {
+		if (!bitmap_equal(reg->hr_nego_node_bitmap, live_node_bitmap,
+				  O2NM_MAX_NODES)) {
 			/* check negotiate bitmap every second to do timeout
 			 * approve decision.
 			 */
@@ -856,8 +856,8 @@ static void o2hb_set_quorum_device(struct o2hb_region *reg)
 	 * live nodes heartbeat on it. In other words, the region has been
 	 * added to all nodes.
 	 */
-	if (memcmp(reg->hr_live_node_bitmap, o2hb_live_node_bitmap,
-		   sizeof(o2hb_live_node_bitmap)))
+	if (!bitmap_equal(reg->hr_live_node_bitmap, o2hb_live_node_bitmap,
+			  O2NM_MAX_NODES))
 		goto unlock;
 
 	printk(KERN_NOTICE "o2hb: Region %s (%pg) is now a quorum device\n",
@@ -1087,7 +1087,7 @@ static int o2hb_do_disk_heartbeat(struct o2hb_region *reg)
 	 * If a node is not configured but is in the livemap, we still need
 	 * to read the slot so as to be able to remove it from the livemap.
 	 */
-	o2hb_fill_node_map(live_node_bitmap, sizeof(live_node_bitmap));
+	o2hb_fill_node_map(live_node_bitmap, O2NM_MAX_NODES);
 	i = -1;
 	while ((i = find_next_bit(live_node_bitmap,
 				  O2NM_MAX_NODES, i + 1)) < O2NM_MAX_NODES) {
@@ -1437,11 +1437,11 @@ void o2hb_init(void)
 	for (i = 0; i < ARRAY_SIZE(o2hb_live_slots); i++)
 		INIT_LIST_HEAD(&o2hb_live_slots[i]);
 
-	memset(o2hb_live_node_bitmap, 0, sizeof(o2hb_live_node_bitmap));
-	memset(o2hb_region_bitmap, 0, sizeof(o2hb_region_bitmap));
-	memset(o2hb_live_region_bitmap, 0, sizeof(o2hb_live_region_bitmap));
-	memset(o2hb_quorum_region_bitmap, 0, sizeof(o2hb_quorum_region_bitmap));
-	memset(o2hb_failed_region_bitmap, 0, sizeof(o2hb_failed_region_bitmap));
+	bitmap_zero(o2hb_live_node_bitmap, O2NM_MAX_NODES);
+	bitmap_zero(o2hb_region_bitmap, O2NM_MAX_REGIONS);
+	bitmap_zero(o2hb_live_region_bitmap, O2NM_MAX_REGIONS);
+	bitmap_zero(o2hb_quorum_region_bitmap, O2NM_MAX_REGIONS);
+	bitmap_zero(o2hb_failed_region_bitmap, O2NM_MAX_REGIONS);
 
 	o2hb_dependent_users = 0;
 
@@ -1450,23 +1450,21 @@ void o2hb_init(void)
 
 /* if we're already in a callback then we're already serialized by the sem */
 static void o2hb_fill_node_map_from_callback(unsigned long *map,
-					     unsigned bytes)
+					     unsigned int bits)
 {
-	BUG_ON(bytes < (BITS_TO_LONGS(O2NM_MAX_NODES) * sizeof(unsigned long)));
-
-	memcpy(map, &o2hb_live_node_bitmap, bytes);
+	bitmap_copy(map, o2hb_live_node_bitmap, bits);
 }
 
 /*
  * get a map of all nodes that are heartbeating in any regions
  */
-void o2hb_fill_node_map(unsigned long *map, unsigned bytes)
+void o2hb_fill_node_map(unsigned long *map, unsigned int bits)
 {
 	/* callers want to serialize this map and callbacks so that they
 	 * can trust that they don't miss nodes coming to the party */
 	down_read(&o2hb_callback_sem);
 	spin_lock(&o2hb_live_lock);
-	o2hb_fill_node_map_from_callback(map, bytes);
+	o2hb_fill_node_map_from_callback(map, bits);
 	spin_unlock(&o2hb_live_lock);
 	up_read(&o2hb_callback_sem);
 }
@@ -2460,7 +2458,7 @@ int o2hb_check_node_heartbeating_no_sem(u8 node_num)
 	unsigned long testing_map[BITS_TO_LONGS(O2NM_MAX_NODES)];
 
 	spin_lock(&o2hb_live_lock);
-	o2hb_fill_node_map_from_callback(testing_map, sizeof(testing_map));
+	o2hb_fill_node_map_from_callback(testing_map, O2NM_MAX_NODES);
 	spin_unlock(&o2hb_live_lock);
 	if (!test_bit(node_num, testing_map)) {
 		mlog(ML_HEARTBEAT,
@@ -2477,7 +2475,7 @@ int o2hb_check_node_heartbeating_from_callback(u8 node_num)
 {
 	unsigned long testing_map[BITS_TO_LONGS(O2NM_MAX_NODES)];
 
-	o2hb_fill_node_map_from_callback(testing_map, sizeof(testing_map));
+	o2hb_fill_node_map_from_callback(testing_map, O2NM_MAX_NODES);
 	if (!test_bit(node_num, testing_map)) {
 		mlog(ML_HEARTBEAT,
 		     "node (%u) does not have heartbeating enabled.\n",
diff --git a/fs/ocfs2/cluster/heartbeat.h b/fs/ocfs2/cluster/heartbeat.h
index 1d4100abf6f8..8ef8c1b9eeb7 100644
--- a/fs/ocfs2/cluster/heartbeat.h
+++ b/fs/ocfs2/cluster/heartbeat.h
@@ -59,7 +59,7 @@ int o2hb_register_callback(const char *region_uuid,
 void o2hb_unregister_callback(const char *region_uuid,
 			      struct o2hb_callback_func *hc);
 void o2hb_fill_node_map(unsigned long *map,
-			unsigned bytes);
+			unsigned int bits);
 void o2hb_exit(void);
 void o2hb_init(void);
 int o2hb_check_node_heartbeating_no_sem(u8 node_num);
diff --git a/fs/ocfs2/cluster/netdebug.c b/fs/ocfs2/cluster/netdebug.c
index 7524994e3199..35c05c18de59 100644
--- a/fs/ocfs2/cluster/netdebug.c
+++ b/fs/ocfs2/cluster/netdebug.c
@@ -438,7 +438,7 @@ static int o2net_fill_bitmap(char *buf, int len)
 	unsigned long map[BITS_TO_LONGS(O2NM_MAX_NODES)];
 	int i = -1, out = 0;
 
-	o2net_fill_node_map(map, sizeof(map));
+	o2net_fill_node_map(map, O2NM_MAX_NODES);
 
 	while ((i = find_next_bit(map, O2NM_MAX_NODES, i + 1)) < O2NM_MAX_NODES)
 		out += scnprintf(buf + out, PAGE_SIZE - out, "%d ", i);
diff --git a/fs/ocfs2/cluster/nodemanager.c b/fs/ocfs2/cluster/nodemanager.c
index 27fee68f860a..2f61d39e4e50 100644
--- a/fs/ocfs2/cluster/nodemanager.c
+++ b/fs/ocfs2/cluster/nodemanager.c
@@ -54,7 +54,7 @@ int o2nm_configured_node_map(unsigned long *map, unsigned bytes)
 		return -EINVAL;
 
 	read_lock(&cluster->cl_nodes_lock);
-	memcpy(map, cluster->cl_nodes_bitmap, sizeof(cluster->cl_nodes_bitmap));
+	bitmap_copy(map, cluster->cl_nodes_bitmap, O2NM_MAX_NODES);
 	read_unlock(&cluster->cl_nodes_lock);
 
 	return 0;
diff --git a/fs/ocfs2/cluster/tcp.c b/fs/ocfs2/cluster/tcp.c
index f660c0dbdb63..6f5a3fb97c7f 100644
--- a/fs/ocfs2/cluster/tcp.c
+++ b/fs/ocfs2/cluster/tcp.c
@@ -990,14 +990,12 @@ static int o2net_tx_can_proceed(struct o2net_node *nn,
 }
 
 /* Get a map of all nodes to which this node is currently connected to */
-void o2net_fill_node_map(unsigned long *map, unsigned bytes)
+void o2net_fill_node_map(unsigned long *map, unsigned int bits)
 {
 	struct o2net_sock_container *sc;
 	int node, ret;
 
-	BUG_ON(bytes < (BITS_TO_LONGS(O2NM_MAX_NODES) * sizeof(unsigned long)));
-
-	memset(map, 0, bytes);
+	bitmap_zero(map, bits);
 	for (node = 0; node < O2NM_MAX_NODES; ++node) {
 		if (!o2net_tx_can_proceed(o2net_nn_from_num(node), &sc, &ret))
 			continue;
diff --git a/fs/ocfs2/dlm/dlmcommon.h b/fs/ocfs2/dlm/dlmcommon.h
index fd2022712167..20f790a47484 100644
--- a/fs/ocfs2/dlm/dlmcommon.h
+++ b/fs/ocfs2/dlm/dlmcommon.h
@@ -1094,7 +1094,7 @@ static inline enum dlm_status dlm_err_to_dlm_status(int err)
 static inline void dlm_node_iter_init(unsigned long *map,
 				      struct dlm_node_iter *iter)
 {
-	memcpy(iter->node_map, map, sizeof(iter->node_map));
+	bitmap_copy(iter->node_map, map, O2NM_MAX_NODES);
 	iter->curnode = -1;
 }
 
diff --git a/fs/ocfs2/dlm/dlmdomain.c b/fs/ocfs2/dlm/dlmdomain.c
index c4eccd499db8..5c04dde99981 100644
--- a/fs/ocfs2/dlm/dlmdomain.c
+++ b/fs/ocfs2/dlm/dlmdomain.c
@@ -1576,8 +1576,8 @@ static int dlm_should_restart_join(struct dlm_ctxt *dlm,
 	spin_lock(&dlm->spinlock);
 	/* For now, we restart the process if the node maps have
 	 * changed at all */
-	ret = memcmp(ctxt->live_map, dlm->live_nodes_map,
-		     sizeof(dlm->live_nodes_map));
+	ret = !bitmap_equal(ctxt->live_map, dlm->live_nodes_map,
+			    O2NM_MAX_NODES);
 	spin_unlock(&dlm->spinlock);
 
 	if (ret)
@@ -1604,13 +1604,11 @@ static int dlm_try_to_join_domain(struct dlm_ctxt *dlm)
 	/* group sem locking should work for us here -- we're already
 	 * registered for heartbeat events so filling this should be
 	 * atomic wrt getting those handlers called. */
-	o2hb_fill_node_map(dlm->live_nodes_map, sizeof(dlm->live_nodes_map));
+	o2hb_fill_node_map(dlm->live_nodes_map, O2NM_MAX_NODES);
 
 	spin_lock(&dlm->spinlock);
-	memcpy(ctxt->live_map, dlm->live_nodes_map, sizeof(ctxt->live_map));
-
+	bitmap_copy(ctxt->live_map, dlm->live_nodes_map, O2NM_MAX_NODES);
 	__dlm_set_joining_node(dlm, dlm->node_num);
-
 	spin_unlock(&dlm->spinlock);
 
 	node = -1;
@@ -1643,8 +1641,7 @@ static int dlm_try_to_join_domain(struct dlm_ctxt *dlm)
 	 * yes_resp_map. Copy that into our domain map and send a join
 	 * assert message to clean up everyone elses state. */
 	spin_lock(&dlm->spinlock);
-	memcpy(dlm->domain_map, ctxt->yes_resp_map,
-	       sizeof(ctxt->yes_resp_map));
+	bitmap_copy(dlm->domain_map, ctxt->yes_resp_map, O2NM_MAX_NODES);
 	set_bit(dlm->node_num, dlm->domain_map);
 	spin_unlock(&dlm->spinlock);
 
@@ -2009,9 +2006,9 @@ static struct dlm_ctxt *dlm_alloc_ctxt(const char *domain,
 	mlog(0, "dlm->recovery_map=%p, &(dlm->recovery_map[0])=%p\n",
 		  dlm->recovery_map, &(dlm->recovery_map[0]));
 
-	memset(dlm->recovery_map, 0, sizeof(dlm->recovery_map));
-	memset(dlm->live_nodes_map, 0, sizeof(dlm->live_nodes_map));
-	memset(dlm->domain_map, 0, sizeof(dlm->domain_map));
+	bitmap_zero(dlm->recovery_map, O2NM_MAX_NODES);
+	bitmap_zero(dlm->live_nodes_map, O2NM_MAX_NODES);
+	bitmap_zero(dlm->domain_map, O2NM_MAX_NODES);
 
 	dlm->dlm_thread_task = NULL;
 	dlm->dlm_reco_thread_task = NULL;
diff --git a/fs/ocfs2/dlm/dlmmaster.c b/fs/ocfs2/dlm/dlmmaster.c
index 227da5b1b6ab..d610da8e2f24 100644
--- a/fs/ocfs2/dlm/dlmmaster.c
+++ b/fs/ocfs2/dlm/dlmmaster.c
@@ -258,12 +258,12 @@ static void dlm_init_mle(struct dlm_master_list_entry *mle,
 	mle->type = type;
 	INIT_HLIST_NODE(&mle->master_hash_node);
 	INIT_LIST_HEAD(&mle->hb_events);
-	memset(mle->maybe_map, 0, sizeof(mle->maybe_map));
+	bitmap_zero(mle->maybe_map, O2NM_MAX_NODES);
 	spin_lock_init(&mle->spinlock);
 	init_waitqueue_head(&mle->wq);
 	atomic_set(&mle->woken, 0);
 	kref_init(&mle->mle_refs);
-	memset(mle->response_map, 0, sizeof(mle->response_map));
+	bitmap_zero(mle->response_map, O2NM_MAX_NODES);
 	mle->master = O2NM_MAX_NODES;
 	mle->new_master = O2NM_MAX_NODES;
 	mle->inuse = 0;
@@ -290,8 +290,8 @@ static void dlm_init_mle(struct dlm_master_list_entry *mle,
 	atomic_inc(&dlm->mle_cur_count[mle->type]);
 
 	/* copy off the node_map and register hb callbacks on our copy */
-	memcpy(mle->node_map, dlm->domain_map, sizeof(mle->node_map));
-	memcpy(mle->vote_map, dlm->domain_map, sizeof(mle->vote_map));
+	bitmap_copy(mle->node_map, dlm->domain_map, O2NM_MAX_NODES);
+	bitmap_copy(mle->vote_map, dlm->domain_map, O2NM_MAX_NODES);
 	clear_bit(dlm->node_num, mle->vote_map);
 	clear_bit(dlm->node_num, mle->node_map);
 
@@ -572,7 +572,7 @@ static void dlm_init_lockres(struct dlm_ctxt *dlm,
 	spin_unlock(&dlm->track_lock);
 
 	memset(res->lvb, 0, DLM_LVB_LEN);
-	memset(res->refmap, 0, sizeof(res->refmap));
+	bitmap_zero(res->refmap, O2NM_MAX_NODES);
 }
 
 struct dlm_lock_resource *dlm_new_lockres(struct dlm_ctxt *dlm,
@@ -1036,10 +1036,10 @@ recheck:
 
 	spin_lock(&mle->spinlock);
 	m = mle->master;
-	map_changed = (memcmp(mle->vote_map, mle->node_map,
-			      sizeof(mle->vote_map)) != 0);
-	voting_done = (memcmp(mle->vote_map, mle->response_map,
-			     sizeof(mle->vote_map)) == 0);
+	map_changed = !bitmap_equal(mle->vote_map, mle->node_map,
+				    O2NM_MAX_NODES);
+	voting_done = bitmap_equal(mle->vote_map, mle->response_map,
+				   O2NM_MAX_NODES);
 
 	/* restart if we hit any errors */
 	if (map_changed) {
@@ -1277,11 +1277,11 @@ static int dlm_restart_lock_mastery(struct dlm_ctxt *dlm,
 
 			/* now blank out everything, as if we had never
 			 * contacted anyone */
-			memset(mle->maybe_map, 0, sizeof(mle->maybe_map));
-			memset(mle->response_map, 0, sizeof(mle->response_map));
+			bitmap_zero(mle->maybe_map, O2NM_MAX_NODES);
+			bitmap_zero(mle->response_map, O2NM_MAX_NODES);
 			/* reset the vote_map to the current node_map */
-			memcpy(mle->vote_map, mle->node_map,
-			       sizeof(mle->node_map));
+			bitmap_copy(mle->vote_map, mle->node_map,
+				    O2NM_MAX_NODES);
 			/* put myself into the maybe map */
 			if (mle->type != DLM_MLE_BLOCK)
 				set_bit(dlm->node_num, mle->maybe_map);
@@ -2094,7 +2094,7 @@ static void dlm_assert_master_worker(struct dlm_work_item *item, void *data)
 	flags = item->u.am.flags;
 
 	spin_lock(&dlm->spinlock);
-	memcpy(nodemap, dlm->domain_map, sizeof(nodemap));
+	bitmap_copy(nodemap, dlm->domain_map, O2NM_MAX_NODES);
 	spin_unlock(&dlm->spinlock);
 
 	clear_bit(dlm->node_num, nodemap);
@@ -3447,7 +3447,7 @@ int dlm_finish_migration(struct dlm_ctxt *dlm, struct dlm_lock_resource *res,
 		ret = 0;
 	}
 
-	memset(iter.node_map, 0, sizeof(iter.node_map));
+	bitmap_zero(iter.node_map, O2NM_MAX_NODES);
 	set_bit(old_master, iter.node_map);
 	mlog(0, "doing assert master of %.*s back to %u\n",
 	     res->lockname.len, res->lockname.name, old_master);
diff --git a/fs/ocfs2/dlm/dlmrecovery.c b/fs/ocfs2/dlm/dlmrecovery.c
index 52ad342fec3e..50da8af988c1 100644
--- a/fs/ocfs2/dlm/dlmrecovery.c
+++ b/fs/ocfs2/dlm/dlmrecovery.c
@@ -733,7 +733,7 @@ static int dlm_init_recovery_area(struct dlm_ctxt *dlm, u8 dead_node)
 	struct dlm_reco_node_data *ndata;
 
 	spin_lock(&dlm->spinlock);
-	memcpy(dlm->reco.node_map, dlm->domain_map, sizeof(dlm->domain_map));
+	bitmap_copy(dlm->reco.node_map, dlm->domain_map, O2NM_MAX_NODES);
 	/* nodes can only be removed (by dying) after dropping
 	 * this lock, and death will be trapped later, so this should do */
 	spin_unlock(&dlm->spinlock);
diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c
index 126671e6caed..3fb98b4569a2 100644
--- a/fs/ocfs2/journal.c
+++ b/fs/ocfs2/journal.c
@@ -157,7 +157,7 @@ static void ocfs2_queue_replay_slots(struct ocfs2_super *osb,
 	replay_map->rm_state = REPLAY_DONE;
 }
 
-static void ocfs2_free_replay_slots(struct ocfs2_super *osb)
+void ocfs2_free_replay_slots(struct ocfs2_super *osb)
 {
 	struct ocfs2_replay_map *replay_map = osb->replay_map;
 
diff --git a/fs/ocfs2/journal.h b/fs/ocfs2/journal.h
index 969d0aa28718..41c382f68529 100644
--- a/fs/ocfs2/journal.h
+++ b/fs/ocfs2/journal.h
@@ -150,6 +150,7 @@ int ocfs2_recovery_init(struct ocfs2_super *osb);
 void ocfs2_recovery_exit(struct ocfs2_super *osb);
 
 int ocfs2_compute_replay_slots(struct ocfs2_super *osb);
+void ocfs2_free_replay_slots(struct ocfs2_super *osb);
 /*
  *  Journal Control:
  *  Initialize, Load, Shutdown, Wipe a journal.
diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h
index 740b64238312..a503c553bab2 100644
--- a/fs/ocfs2/ocfs2.h
+++ b/fs/ocfs2/ocfs2.h
@@ -560,8 +560,7 @@ static inline unsigned int ocfs2_read_links_count(struct ocfs2_dinode *di)
 	u32 nlink = le16_to_cpu(di->i_links_count);
 	u32 hi = le16_to_cpu(di->i_links_count_hi);
 
-	if (di->i_dyn_features & cpu_to_le16(OCFS2_INDEXED_DIR_FL))
-		nlink |= (hi << OCFS2_LINKS_HI_SHIFT);
+	nlink |= (hi << OCFS2_LINKS_HI_SHIFT);
 
 	return nlink;
 }
diff --git a/fs/ocfs2/stack_o2cb.c b/fs/ocfs2/stack_o2cb.c
index 88f75f7f02d7..c973c03f6fd8 100644
--- a/fs/ocfs2/stack_o2cb.c
+++ b/fs/ocfs2/stack_o2cb.c
@@ -273,17 +273,17 @@ static int o2cb_cluster_check(void)
 	 */
 #define	O2CB_MAP_STABILIZE_COUNT	60
 	for (i = 0; i < O2CB_MAP_STABILIZE_COUNT; ++i) {
-		o2hb_fill_node_map(hbmap, sizeof(hbmap));
+		o2hb_fill_node_map(hbmap, O2NM_MAX_NODES);
 		if (!test_bit(node_num, hbmap)) {
 			printk(KERN_ERR "o2cb: %s heartbeat has not been "
 			       "started.\n", (o2hb_global_heartbeat_active() ?
 					      "Global" : "Local"));
 			return -EINVAL;
 		}
-		o2net_fill_node_map(netmap, sizeof(netmap));
+		o2net_fill_node_map(netmap, O2NM_MAX_NODES);
 		/* Force set the current node to allow easy compare */
 		set_bit(node_num, netmap);
-		if (!memcmp(hbmap, netmap, sizeof(hbmap)))
+		if (bitmap_equal(hbmap, netmap, O2NM_MAX_NODES))
 			return 0;
 		if (i < O2CB_MAP_STABILIZE_COUNT - 1)
 			msleep(1000);
diff --git a/fs/ocfs2/stackglue.c b/fs/ocfs2/stackglue.c
index 317126261523..a8d5ca98fa57 100644
--- a/fs/ocfs2/stackglue.c
+++ b/fs/ocfs2/stackglue.c
@@ -669,6 +669,8 @@ static struct ctl_table_header *ocfs2_table_header;
 
 static int __init ocfs2_stack_glue_init(void)
 {
+	int ret;
+
 	strcpy(cluster_stack_name, OCFS2_STACK_PLUGIN_O2CB);
 
 	ocfs2_table_header = register_sysctl("fs/ocfs2/nm", ocfs2_nm_table);
@@ -678,7 +680,11 @@ static int __init ocfs2_stack_glue_init(void)
 		return -ENOMEM; /* or something. */
 	}
 
-	return ocfs2_sysfs_init();
+	ret = ocfs2_sysfs_init();
+	if (ret)
+		unregister_sysctl_table(ocfs2_table_header);
+
+	return ret;
 }
 
 static void __exit ocfs2_stack_glue_exit(void)
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index 42c993e53924..0b0e6a132101 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -1159,6 +1159,7 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
 out_dismount:
 	atomic_set(&osb->vol_state, VOLUME_DISABLED);
 	wake_up(&osb->osb_mount_event);
+	ocfs2_free_replay_slots(osb);
 	ocfs2_dismount_volume(sb, 1);
 	goto out;
 
@@ -1822,12 +1823,14 @@ static int ocfs2_mount_volume(struct super_block *sb)
 	status = ocfs2_truncate_log_init(osb);
 	if (status < 0) {
 		mlog_errno(status);
-		goto out_system_inodes;
+		goto out_check_volume;
 	}
 
 	ocfs2_super_unlock(osb, 1);
 	return 0;
 
+out_check_volume:
+	ocfs2_free_replay_slots(osb);
 out_system_inodes:
 	if (osb->local_alloc_state == OCFS2_LA_ENABLED)
 		ocfs2_shutdown_local_alloc(osb);
diff --git a/fs/proc/cmdline.c b/fs/proc/cmdline.c
index fa762c5fbcb2..91fe1597af7b 100644
--- a/fs/proc/cmdline.c
+++ b/fs/proc/cmdline.c
@@ -3,6 +3,7 @@
 #include <linux/init.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
+#include "internal.h"
 
 static int cmdline_proc_show(struct seq_file *m, void *v)
 {
@@ -13,7 +14,10 @@ static int cmdline_proc_show(struct seq_file *m, void *v)
 
 static int __init proc_cmdline_init(void)
 {
-	proc_create_single("cmdline", 0, NULL, cmdline_proc_show);
+	struct proc_dir_entry *pde;
+
+	pde = proc_create_single("cmdline", 0, NULL, cmdline_proc_show);
+	pde->size = saved_command_line_len + 1;
 	return 0;
 }
 fs_initcall(proc_cmdline_init);
diff --git a/fs/proc/fd.c b/fs/proc/fd.c
index 913bef0d2a36..fc46d6fe080c 100644
--- a/fs/proc/fd.c
+++ b/fs/proc/fd.c
@@ -7,6 +7,7 @@
 #include <linux/namei.h>
 #include <linux/pid.h>
 #include <linux/ptrace.h>
+#include <linux/bitmap.h>
 #include <linux/security.h>
 #include <linux/file.h>
 #include <linux/seq_file.h>
@@ -279,6 +280,30 @@ out:
 	return 0;
 }
 
+static int proc_readfd_count(struct inode *inode, loff_t *count)
+{
+	struct task_struct *p = get_proc_task(inode);
+	struct fdtable *fdt;
+
+	if (!p)
+		return -ENOENT;
+
+	task_lock(p);
+	if (p->files) {
+		rcu_read_lock();
+
+		fdt = files_fdtable(p->files);
+		*count = bitmap_weight(fdt->open_fds, fdt->max_fds);
+
+		rcu_read_unlock();
+	}
+	task_unlock(p);
+
+	put_task_struct(p);
+
+	return 0;
+}
+
 static int proc_readfd(struct file *file, struct dir_context *ctx)
 {
 	return proc_readfd_common(file, ctx, proc_fd_instantiate);
@@ -319,9 +344,29 @@ int proc_fd_permission(struct user_namespace *mnt_userns,
 	return rv;
 }
 
+static int proc_fd_getattr(struct user_namespace *mnt_userns,
+			const struct path *path, struct kstat *stat,
+			u32 request_mask, unsigned int query_flags)
+{
+	struct inode *inode = d_inode(path->dentry);
+	int rv = 0;
+
+	generic_fillattr(&init_user_ns, inode, stat);
+
+	/* If it's a directory, put the number of open fds there */
+	if (S_ISDIR(inode->i_mode)) {
+		rv = proc_readfd_count(inode, &stat->size);
+		if (rv < 0)
+			return rv;
+	}
+
+	return rv;
+}
+
 const struct inode_operations proc_fd_inode_operations = {
 	.lookup		= proc_lookupfd,
 	.permission	= proc_fd_permission,
+	.getattr	= proc_fd_getattr,
 	.setattr	= proc_setattr,
 };
 
diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c
index f2aa86c421f2..74747571d58e 100644
--- a/fs/proc/vmcore.c
+++ b/fs/proc/vmcore.c
@@ -1567,6 +1567,7 @@ static int __init vmcore_init(void)
 		return rc;
 	rc = parse_crash_elf_headers();
 	if (rc) {
+		elfcorehdr_free(elfcorehdr_addr);
 		pr_warn("Kdump: vmcore not initialized\n");
 		return rc;
 	}
diff --git a/fs/squashfs/Kconfig b/fs/squashfs/Kconfig
index 916e78fabcaa..60fc98bdf421 100644
--- a/fs/squashfs/Kconfig
+++ b/fs/squashfs/Kconfig
@@ -54,9 +54,35 @@ config SQUASHFS_FILE_DIRECT
 
 endchoice
 
+config SQUASHFS_DECOMP_SINGLE
+	depends on SQUASHFS
+	def_bool n
+
+config SQUASHFS_DECOMP_MULTI
+	depends on SQUASHFS
+	def_bool n
+
+config SQUASHFS_DECOMP_MULTI_PERCPU
+	depends on SQUASHFS
+	def_bool n
+
+config SQUASHFS_CHOICE_DECOMP_BY_MOUNT
+	bool "Select the parallel decompression mode during mount"
+	depends on SQUASHFS
+	default n
+	select SQUASHFS_DECOMP_SINGLE
+	select SQUASHFS_DECOMP_MULTI
+	select SQUASHFS_DECOMP_MULTI_PERCPU
+	select SQUASHFS_MOUNT_DECOMP_THREADS
+	help
+	  Compile all parallel decompression modes and specify the
+	  decompression mode by setting "threads=" during mount.
+	  default Decompressor parallelisation is SQUASHFS_DECOMP_SINGLE
+
 choice
-	prompt "Decompressor parallelisation options"
+	prompt "Select decompression parallel mode at compile time"
 	depends on SQUASHFS
+	depends on !SQUASHFS_CHOICE_DECOMP_BY_MOUNT
 	help
 	  Squashfs now supports three parallelisation options for
 	  decompression.  Each one exhibits various trade-offs between
@@ -64,15 +90,17 @@ choice
 
 	  If in doubt, select "Single threaded compression"
 
-config SQUASHFS_DECOMP_SINGLE
+config SQUASHFS_COMPILE_DECOMP_SINGLE
 	bool "Single threaded compression"
+	select SQUASHFS_DECOMP_SINGLE
 	help
 	  Traditionally Squashfs has used single-threaded decompression.
 	  Only one block (data or metadata) can be decompressed at any
 	  one time.  This limits CPU and memory usage to a minimum.
 
-config SQUASHFS_DECOMP_MULTI
+config SQUASHFS_COMPILE_DECOMP_MULTI
 	bool "Use multiple decompressors for parallel I/O"
+	select SQUASHFS_DECOMP_MULTI
 	help
 	  By default Squashfs uses a single decompressor but it gives
 	  poor performance on parallel I/O workloads when using multiple CPU
@@ -85,8 +113,9 @@ config SQUASHFS_DECOMP_MULTI
 	  decompressors per core.  It dynamically allocates decompressors
 	  on a demand basis.
 
-config SQUASHFS_DECOMP_MULTI_PERCPU
+config SQUASHFS_COMPILE_DECOMP_MULTI_PERCPU
 	bool "Use percpu multiple decompressors for parallel I/O"
+	select SQUASHFS_DECOMP_MULTI_PERCPU
 	help
 	  By default Squashfs uses a single decompressor but it gives
 	  poor performance on parallel I/O workloads when using multiple CPU
@@ -95,9 +124,21 @@ config SQUASHFS_DECOMP_MULTI_PERCPU
 	  This decompressor implementation uses a maximum of one
 	  decompressor per core.  It uses percpu variables to ensure
 	  decompression is load-balanced across the cores.
-
 endchoice
 
+config SQUASHFS_MOUNT_DECOMP_THREADS
+	bool "Add the mount parameter 'threads=' for squashfs"
+	depends on SQUASHFS
+	depends on SQUASHFS_DECOMP_MULTI
+	default n
+	help
+	  Use threads= to set the decompression parallel mode and the number of threads.
+	  If SQUASHFS_CHOICE_DECOMP_BY_MOUNT=y
+	      threads=<single|multi|percpu|1|2|3|...>
+	  else
+	      threads=<2|3|...>
+	  The upper limit is num_online_cpus() * 2.
+
 config SQUASHFS_XATTR
 	bool "Squashfs XATTR support"
 	depends on SQUASHFS
diff --git a/fs/squashfs/block.c b/fs/squashfs/block.c
index 833aca92301f..bed3bb8b27fa 100644
--- a/fs/squashfs/block.c
+++ b/fs/squashfs/block.c
@@ -216,7 +216,7 @@ int squashfs_read_data(struct super_block *sb, u64 index, int length,
 			res = -EIO;
 			goto out_free_bio;
 		}
-		res = squashfs_decompress(msblk, bio, offset, length, output);
+		res = msblk->thread_ops->decompress(msblk, bio, offset, length, output);
 	} else {
 		res = copy_bio_to_actor(bio, output, offset, length);
 	}
diff --git a/fs/squashfs/decompressor.c b/fs/squashfs/decompressor.c
index d57bef91ab08..8893cb9b4198 100644
--- a/fs/squashfs/decompressor.c
+++ b/fs/squashfs/decompressor.c
@@ -134,7 +134,7 @@ void *squashfs_decompressor_setup(struct super_block *sb, unsigned short flags)
 	if (IS_ERR(comp_opts))
 		return comp_opts;
 
-	stream = squashfs_decompressor_create(msblk, comp_opts);
+	stream = msblk->thread_ops->create(msblk, comp_opts);
 	if (IS_ERR(stream))
 		kfree(comp_opts);
 
diff --git a/fs/squashfs/decompressor_multi.c b/fs/squashfs/decompressor_multi.c
index db9f12a3ea05..416c53eedbd1 100644
--- a/fs/squashfs/decompressor_multi.c
+++ b/fs/squashfs/decompressor_multi.c
@@ -29,12 +29,11 @@
 #define MAX_DECOMPRESSOR	(num_online_cpus() * 2)
 
 
-int squashfs_max_decompressors(void)
+static int squashfs_max_decompressors(void)
 {
 	return MAX_DECOMPRESSOR;
 }
 
-
 struct squashfs_stream {
 	void			*comp_opts;
 	struct list_head	strm_list;
@@ -59,7 +58,7 @@ static void put_decomp_stream(struct decomp_stream *decomp_strm,
 	wake_up(&stream->wait);
 }
 
-void *squashfs_decompressor_create(struct squashfs_sb_info *msblk,
+static void *squashfs_decompressor_create(struct squashfs_sb_info *msblk,
 				void *comp_opts)
 {
 	struct squashfs_stream *stream;
@@ -103,7 +102,7 @@ out:
 }
 
 
-void squashfs_decompressor_destroy(struct squashfs_sb_info *msblk)
+static void squashfs_decompressor_destroy(struct squashfs_sb_info *msblk)
 {
 	struct squashfs_stream *stream = msblk->stream;
 	if (stream) {
@@ -145,7 +144,7 @@ static struct decomp_stream *get_decomp_stream(struct squashfs_sb_info *msblk,
 		 * If there is no available decomp and already full,
 		 * let's wait for releasing decomp from other users.
 		 */
-		if (stream->avail_decomp >= MAX_DECOMPRESSOR)
+		if (stream->avail_decomp >= msblk->max_thread_num)
 			goto wait;
 
 		/* Let's allocate new decomp */
@@ -161,7 +160,7 @@ static struct decomp_stream *get_decomp_stream(struct squashfs_sb_info *msblk,
 		}
 
 		stream->avail_decomp++;
-		WARN_ON(stream->avail_decomp > MAX_DECOMPRESSOR);
+		WARN_ON(stream->avail_decomp > msblk->max_thread_num);
 
 		mutex_unlock(&stream->mutex);
 		break;
@@ -180,7 +179,7 @@ wait:
 }
 
 
-int squashfs_decompress(struct squashfs_sb_info *msblk, struct bio *bio,
+static int squashfs_decompress(struct squashfs_sb_info *msblk, struct bio *bio,
 			int offset, int length,
 			struct squashfs_page_actor *output)
 {
@@ -195,3 +194,10 @@ int squashfs_decompress(struct squashfs_sb_info *msblk, struct bio *bio,
 			msblk->decompressor->name);
 	return res;
 }
+
+const struct squashfs_decompressor_thread_ops squashfs_decompressor_multi = {
+	.create = squashfs_decompressor_create,
+	.destroy = squashfs_decompressor_destroy,
+	.decompress = squashfs_decompress,
+	.max_decompressors = squashfs_max_decompressors,
+};
diff --git a/fs/squashfs/decompressor_multi_percpu.c b/fs/squashfs/decompressor_multi_percpu.c
index b881b9283b7f..1dfadf76ed9a 100644
--- a/fs/squashfs/decompressor_multi_percpu.c
+++ b/fs/squashfs/decompressor_multi_percpu.c
@@ -25,7 +25,7 @@ struct squashfs_stream {
 	local_lock_t	lock;
 };
 
-void *squashfs_decompressor_create(struct squashfs_sb_info *msblk,
+static void *squashfs_decompressor_create(struct squashfs_sb_info *msblk,
 						void *comp_opts)
 {
 	struct squashfs_stream *stream;
@@ -59,7 +59,7 @@ out:
 	return ERR_PTR(err);
 }
 
-void squashfs_decompressor_destroy(struct squashfs_sb_info *msblk)
+static void squashfs_decompressor_destroy(struct squashfs_sb_info *msblk)
 {
 	struct squashfs_stream __percpu *percpu =
 			(struct squashfs_stream __percpu *) msblk->stream;
@@ -75,19 +75,21 @@ void squashfs_decompressor_destroy(struct squashfs_sb_info *msblk)
 	}
 }
 
-int squashfs_decompress(struct squashfs_sb_info *msblk, struct bio *bio,
+static int squashfs_decompress(struct squashfs_sb_info *msblk, struct bio *bio,
 	int offset, int length, struct squashfs_page_actor *output)
 {
 	struct squashfs_stream *stream;
+	struct squashfs_stream __percpu *percpu =
+			(struct squashfs_stream __percpu *) msblk->stream;
 	int res;
 
-	local_lock(&msblk->stream->lock);
-	stream = this_cpu_ptr(msblk->stream);
+	local_lock(&percpu->lock);
+	stream = this_cpu_ptr(percpu);
 
 	res = msblk->decompressor->decompress(msblk, stream->stream, bio,
 					      offset, length, output);
 
-	local_unlock(&msblk->stream->lock);
+	local_unlock(&percpu->lock);
 
 	if (res < 0)
 		ERROR("%s decompression failed, data probably corrupt\n",
@@ -96,7 +98,14 @@ int squashfs_decompress(struct squashfs_sb_info *msblk, struct bio *bio,
 	return res;
 }
 
-int squashfs_max_decompressors(void)
+static int squashfs_max_decompressors(void)
 {
 	return num_possible_cpus();
 }
+
+const struct squashfs_decompressor_thread_ops squashfs_decompressor_percpu = {
+	.create = squashfs_decompressor_create,
+	.destroy = squashfs_decompressor_destroy,
+	.decompress = squashfs_decompress,
+	.max_decompressors = squashfs_max_decompressors,
+};
diff --git a/fs/squashfs/decompressor_single.c b/fs/squashfs/decompressor_single.c
index 4eb3d083d45e..6f161887710b 100644
--- a/fs/squashfs/decompressor_single.c
+++ b/fs/squashfs/decompressor_single.c
@@ -24,7 +24,7 @@ struct squashfs_stream {
 	struct mutex	mutex;
 };
 
-void *squashfs_decompressor_create(struct squashfs_sb_info *msblk,
+static void *squashfs_decompressor_create(struct squashfs_sb_info *msblk,
 						void *comp_opts)
 {
 	struct squashfs_stream *stream;
@@ -49,7 +49,7 @@ out:
 	return ERR_PTR(err);
 }
 
-void squashfs_decompressor_destroy(struct squashfs_sb_info *msblk)
+static void squashfs_decompressor_destroy(struct squashfs_sb_info *msblk)
 {
 	struct squashfs_stream *stream = msblk->stream;
 
@@ -59,7 +59,7 @@ void squashfs_decompressor_destroy(struct squashfs_sb_info *msblk)
 	}
 }
 
-int squashfs_decompress(struct squashfs_sb_info *msblk, struct bio *bio,
+static int squashfs_decompress(struct squashfs_sb_info *msblk, struct bio *bio,
 			int offset, int length,
 			struct squashfs_page_actor *output)
 {
@@ -78,7 +78,14 @@ int squashfs_decompress(struct squashfs_sb_info *msblk, struct bio *bio,
 	return res;
 }
 
-int squashfs_max_decompressors(void)
+static int squashfs_max_decompressors(void)
 {
 	return 1;
 }
+
+const struct squashfs_decompressor_thread_ops squashfs_decompressor_single = {
+	.create = squashfs_decompressor_create,
+	.destroy = squashfs_decompressor_destroy,
+	.decompress = squashfs_decompress,
+	.max_decompressors = squashfs_max_decompressors,
+};
diff --git a/fs/squashfs/squashfs.h b/fs/squashfs/squashfs.h
index 9783e01c8100..a6164fdf9435 100644
--- a/fs/squashfs/squashfs.h
+++ b/fs/squashfs/squashfs.h
@@ -38,11 +38,24 @@ extern const struct squashfs_decompressor *squashfs_lookup_decompressor(int);
 extern void *squashfs_decompressor_setup(struct super_block *, unsigned short);
 
 /* decompressor_xxx.c */
-extern void *squashfs_decompressor_create(struct squashfs_sb_info *, void *);
-extern void squashfs_decompressor_destroy(struct squashfs_sb_info *);
-extern int squashfs_decompress(struct squashfs_sb_info *, struct bio *,
-				int, int, struct squashfs_page_actor *);
-extern int squashfs_max_decompressors(void);
+
+struct squashfs_decompressor_thread_ops {
+	void * (*create)(struct squashfs_sb_info *msblk, void *comp_opts);
+	void (*destroy)(struct squashfs_sb_info *msblk);
+	int (*decompress)(struct squashfs_sb_info *msblk, struct bio *bio,
+			  int offset, int length, struct squashfs_page_actor *output);
+	int (*max_decompressors)(void);
+};
+
+#ifdef CONFIG_SQUASHFS_DECOMP_SINGLE
+extern const struct squashfs_decompressor_thread_ops squashfs_decompressor_single;
+#endif
+#ifdef CONFIG_SQUASHFS_DECOMP_MULTI
+extern const struct squashfs_decompressor_thread_ops squashfs_decompressor_multi;
+#endif
+#ifdef CONFIG_SQUASHFS_DECOMP_MULTI_PERCPU
+extern const struct squashfs_decompressor_thread_ops squashfs_decompressor_percpu;
+#endif
 
 /* export.c */
 extern __le64 *squashfs_read_inode_lookup_table(struct super_block *, u64, u64,
diff --git a/fs/squashfs/squashfs_fs_sb.h b/fs/squashfs/squashfs_fs_sb.h
index 1e90c2575f9b..659082e9e51d 100644
--- a/fs/squashfs/squashfs_fs_sb.h
+++ b/fs/squashfs/squashfs_fs_sb.h
@@ -53,7 +53,7 @@ struct squashfs_sb_info {
 	__le64					*xattr_id_table;
 	struct mutex				meta_index_mutex;
 	struct meta_index			*meta_index;
-	struct squashfs_stream			*stream;
+	void					*stream;
 	__le64					*inode_lookup_table;
 	u64					inode_table;
 	u64					directory_table;
@@ -66,5 +66,7 @@ struct squashfs_sb_info {
 	int					xattr_ids;
 	unsigned int				ids;
 	bool					panic_on_errors;
+	const struct squashfs_decompressor_thread_ops *thread_ops;
+	int					max_thread_num;
 };
 #endif
diff --git a/fs/squashfs/super.c b/fs/squashfs/super.c
index 32565dafa7f3..7d5265a39d20 100644
--- a/fs/squashfs/super.c
+++ b/fs/squashfs/super.c
@@ -47,10 +47,13 @@ enum Opt_errors {
 
 enum squashfs_param {
 	Opt_errors,
+	Opt_threads,
 };
 
 struct squashfs_mount_opts {
 	enum Opt_errors errors;
+	const struct squashfs_decompressor_thread_ops *thread_ops;
+	int thread_num;
 };
 
 static const struct constant_table squashfs_param_errors[] = {
@@ -61,9 +64,66 @@ static const struct constant_table squashfs_param_errors[] = {
 
 static const struct fs_parameter_spec squashfs_fs_parameters[] = {
 	fsparam_enum("errors", Opt_errors, squashfs_param_errors),
+	fsparam_string("threads", Opt_threads),
 	{}
 };
 
+
+static int squashfs_parse_param_threads_str(const char *str, struct squashfs_mount_opts *opts)
+{
+#ifdef CONFIG_SQUASHFS_CHOICE_DECOMP_BY_MOUNT
+	if (strcmp(str, "single") == 0) {
+		opts->thread_ops = &squashfs_decompressor_single;
+		return 0;
+	}
+	if (strcmp(str, "multi") == 0) {
+		opts->thread_ops = &squashfs_decompressor_multi;
+		return 0;
+	}
+	if (strcmp(str, "percpu") == 0) {
+		opts->thread_ops = &squashfs_decompressor_percpu;
+		return 0;
+	}
+#endif
+	return -EINVAL;
+}
+
+static int squashfs_parse_param_threads_num(const char *str, struct squashfs_mount_opts *opts)
+{
+#ifdef CONFIG_SQUASHFS_MOUNT_DECOMP_THREADS
+	int ret;
+	unsigned long num;
+
+	ret = kstrtoul(str, 0, &num);
+	if (ret != 0)
+		return -EINVAL;
+	if (num > 1) {
+		opts->thread_ops = &squashfs_decompressor_multi;
+		if (num > opts->thread_ops->max_decompressors())
+			return -EINVAL;
+		opts->thread_num = (int)num;
+		return 0;
+	}
+#ifdef CONFIG_SQUASHFS_DECOMP_SINGLE
+	if (num == 1) {
+		opts->thread_ops = &squashfs_decompressor_single;
+		opts->thread_num = 1;
+		return 0;
+	}
+#endif
+#endif /* !CONFIG_SQUASHFS_MOUNT_DECOMP_THREADS */
+	return -EINVAL;
+}
+
+static int squashfs_parse_param_threads(const char *str, struct squashfs_mount_opts *opts)
+{
+	int ret = squashfs_parse_param_threads_str(str, opts);
+
+	if (ret == 0)
+		return ret;
+	return squashfs_parse_param_threads_num(str, opts);
+}
+
 static int squashfs_parse_param(struct fs_context *fc, struct fs_parameter *param)
 {
 	struct squashfs_mount_opts *opts = fc->fs_private;
@@ -78,6 +138,10 @@ static int squashfs_parse_param(struct fs_context *fc, struct fs_parameter *para
 	case Opt_errors:
 		opts->errors = result.uint_32;
 		break;
+	case Opt_threads:
+		if (squashfs_parse_param_threads(param->string, opts) != 0)
+			return -EINVAL;
+		break;
 	default:
 		return -EINVAL;
 	}
@@ -133,6 +197,7 @@ static int squashfs_fill_super(struct super_block *sb, struct fs_context *fc)
 		return -ENOMEM;
 	}
 	msblk = sb->s_fs_info;
+	msblk->thread_ops = opts->thread_ops;
 
 	msblk->panic_on_errors = (opts->errors == Opt_errors_panic);
 
@@ -168,6 +233,12 @@ static int squashfs_fill_super(struct super_block *sb, struct fs_context *fc)
 		goto failed_mount;
 	}
 
+	if (opts->thread_num == 0) {
+		msblk->max_thread_num = msblk->thread_ops->max_decompressors();
+	} else {
+		msblk->max_thread_num = opts->thread_num;
+	}
+
 	/* Check the MAJOR & MINOR versions and lookup compression type */
 	msblk->decompressor = supported_squashfs_filesystem(
 			fc,
@@ -252,7 +323,7 @@ static int squashfs_fill_super(struct super_block *sb, struct fs_context *fc)
 
 	/* Allocate read_page block */
 	msblk->read_page = squashfs_cache_init("data",
-		squashfs_max_decompressors(), msblk->block_size);
+		msblk->max_thread_num, msblk->block_size);
 	if (msblk->read_page == NULL) {
 		errorf(fc, "Failed to allocate read_page block");
 		goto failed_mount;
@@ -383,7 +454,7 @@ failed_mount:
 	squashfs_cache_delete(msblk->block_cache);
 	squashfs_cache_delete(msblk->fragment_cache);
 	squashfs_cache_delete(msblk->read_page);
-	squashfs_decompressor_destroy(msblk);
+	msblk->thread_ops->destroy(msblk);
 	kfree(msblk->inode_lookup_table);
 	kfree(msblk->fragment_index);
 	kfree(msblk->id_table);
@@ -435,6 +506,19 @@ static int squashfs_show_options(struct seq_file *s, struct dentry *root)
 	else
 		seq_puts(s, ",errors=continue");
 
+#ifdef CONFIG_SQUASHFS_CHOICE_DECOMP_BY_MOUNT
+	if (msblk->thread_ops == &squashfs_decompressor_single) {
+		seq_puts(s, ",threads=single");
+		return 0;
+	}
+	if (msblk->thread_ops == &squashfs_decompressor_percpu) {
+		seq_puts(s, ",threads=percpu");
+		return 0;
+	}
+#endif
+#ifdef CONFIG_SQUASHFS_MOUNT_DECOMP_THREADS
+	seq_printf(s, ",threads=%d", msblk->max_thread_num);
+#endif
 	return 0;
 }
 
@@ -446,6 +530,16 @@ static int squashfs_init_fs_context(struct fs_context *fc)
 	if (!opts)
 		return -ENOMEM;
 
+#ifdef CONFIG_SQUASHFS_DECOMP_SINGLE
+	opts->thread_ops = &squashfs_decompressor_single;
+#elif defined(CONFIG_SQUASHFS_DECOMP_MULTI)
+	opts->thread_ops = &squashfs_decompressor_multi;
+#elif defined(CONFIG_SQUASHFS_DECOMP_MULTI_PERCPU)
+	opts->thread_ops = &squashfs_decompressor_percpu;
+#else
+#error "fail: unknown squashfs decompression thread mode?"
+#endif
+	opts->thread_num = 0;
 	fc->fs_private = opts;
 	fc->ops = &squashfs_context_ops;
 	return 0;
@@ -478,7 +572,7 @@ static void squashfs_put_super(struct super_block *sb)
 		squashfs_cache_delete(sbi->block_cache);
 		squashfs_cache_delete(sbi->fragment_cache);
 		squashfs_cache_delete(sbi->read_page);
-		squashfs_decompressor_destroy(sbi);
+		sbi->thread_ops->destroy(sbi);
 		kfree(sbi->id_table);
 		kfree(sbi->fragment_index);
 		kfree(sbi->meta_index);
diff --git a/include/linux/coredump.h b/include/linux/coredump.h
index 08a1d3e7e46d..191dcf5af6cb 100644
--- a/include/linux/coredump.h
+++ b/include/linux/coredump.h
@@ -22,6 +22,7 @@ struct coredump_params {
 	struct file *file;
 	unsigned long limit;
 	unsigned long mm_flags;
+	int cpu;
 	loff_t written;
 	loff_t pos;
 	loff_t to_skip;
diff --git a/include/linux/debugfs.h b/include/linux/debugfs.h
index f60674692d36..ea2d919fd9c7 100644
--- a/include/linux/debugfs.h
+++ b/include/linux/debugfs.h
@@ -45,7 +45,7 @@ struct debugfs_u32_array {
 
 extern struct dentry *arch_debugfs_dir;
 
-#define DEFINE_DEBUGFS_ATTRIBUTE(__fops, __get, __set, __fmt)		\
+#define DEFINE_DEBUGFS_ATTRIBUTE_XSIGNED(__fops, __get, __set, __fmt, __is_signed)	\
 static int __fops ## _open(struct inode *inode, struct file *file)	\
 {									\
 	__simple_attr_check_format(__fmt, 0ull);			\
@@ -56,10 +56,16 @@ static const struct file_operations __fops = {				\
 	.open	 = __fops ## _open,					\
 	.release = simple_attr_release,					\
 	.read	 = debugfs_attr_read,					\
-	.write	 = debugfs_attr_write,					\
+	.write	 = (__is_signed) ? debugfs_attr_write_signed : debugfs_attr_write,	\
 	.llseek  = no_llseek,						\
 }
 
+#define DEFINE_DEBUGFS_ATTRIBUTE(__fops, __get, __set, __fmt)		\
+	DEFINE_DEBUGFS_ATTRIBUTE_XSIGNED(__fops, __get, __set, __fmt, false)
+
+#define DEFINE_DEBUGFS_ATTRIBUTE_SIGNED(__fops, __get, __set, __fmt)	\
+	DEFINE_DEBUGFS_ATTRIBUTE_XSIGNED(__fops, __get, __set, __fmt, true)
+
 typedef struct vfsmount *(*debugfs_automount_t)(struct dentry *, void *);
 
 #if defined(CONFIG_DEBUG_FS)
@@ -102,6 +108,8 @@ ssize_t debugfs_attr_read(struct file *file, char __user *buf,
 			size_t len, loff_t *ppos);
 ssize_t debugfs_attr_write(struct file *file, const char __user *buf,
 			size_t len, loff_t *ppos);
+ssize_t debugfs_attr_write_signed(struct file *file, const char __user *buf,
+			size_t len, loff_t *ppos);
 
 struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
                 struct dentry *new_dir, const char *new_name);
@@ -254,6 +262,13 @@ static inline ssize_t debugfs_attr_write(struct file *file,
 	return -ENODEV;
 }
 
+static inline ssize_t debugfs_attr_write_signed(struct file *file,
+					const char __user *buf,
+					size_t len, loff_t *ppos)
+{
+	return -ENODEV;
+}
+
 static inline struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
                 struct dentry *new_dir, char *new_name)
 {
diff --git a/include/linux/eventfd.h b/include/linux/eventfd.h
index 30eb30d6909b..3cd202d3eefb 100644
--- a/include/linux/eventfd.h
+++ b/include/linux/eventfd.h
@@ -61,7 +61,7 @@ static inline struct eventfd_ctx *eventfd_ctx_fdget(int fd)
 	return ERR_PTR(-ENOSYS);
 }
 
-static inline int eventfd_signal(struct eventfd_ctx *ctx, int n)
+static inline int eventfd_signal(struct eventfd_ctx *ctx, __u64 n)
 {
 	return -ENOSYS;
 }
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 71b5c24b55ce..6dd5f1d61fcf 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -3513,7 +3513,7 @@ void simple_transaction_set(struct file *file, size_t n);
  * All attributes contain a text representation of a numeric value
  * that are accessed with the get() and set() functions.
  */
-#define DEFINE_SIMPLE_ATTRIBUTE(__fops, __get, __set, __fmt)		\
+#define DEFINE_SIMPLE_ATTRIBUTE_XSIGNED(__fops, __get, __set, __fmt, __is_signed)	\
 static int __fops ## _open(struct inode *inode, struct file *file)	\
 {									\
 	__simple_attr_check_format(__fmt, 0ull);			\
@@ -3524,10 +3524,16 @@ static const struct file_operations __fops = {				\
 	.open	 = __fops ## _open,					\
 	.release = simple_attr_release,					\
 	.read	 = simple_attr_read,					\
-	.write	 = simple_attr_write,					\
+	.write	 = (__is_signed) ? simple_attr_write_signed : simple_attr_write,	\
 	.llseek	 = generic_file_llseek,					\
 }
 
+#define DEFINE_SIMPLE_ATTRIBUTE(__fops, __get, __set, __fmt)		\
+	DEFINE_SIMPLE_ATTRIBUTE_XSIGNED(__fops, __get, __set, __fmt, false)
+
+#define DEFINE_SIMPLE_ATTRIBUTE_SIGNED(__fops, __get, __set, __fmt)	\
+	DEFINE_SIMPLE_ATTRIBUTE_XSIGNED(__fops, __get, __set, __fmt, true)
+
 static inline __printf(1, 2)
 void __simple_attr_check_format(const char *fmt, ...)
 {
@@ -3542,6 +3548,8 @@ ssize_t simple_attr_read(struct file *file, char __user *buf,
 			 size_t len, loff_t *ppos);
 ssize_t simple_attr_write(struct file *file, const char __user *buf,
 			  size_t len, loff_t *ppos);
+ssize_t simple_attr_write_signed(struct file *file, const char __user *buf,
+				 size_t len, loff_t *ppos);
 
 struct ctl_table;
 int __init list_bdev_fs_names(char *buf, size_t size);
diff --git a/include/linux/init.h b/include/linux/init.h
index 077d7f93b402..c5fe6d26f5b1 100644
--- a/include/linux/init.h
+++ b/include/linux/init.h
@@ -2,7 +2,9 @@
 #ifndef _LINUX_INIT_H
 #define _LINUX_INIT_H
 
+#include <linux/build_bug.h>
 #include <linux/compiler.h>
+#include <linux/stringify.h>
 #include <linux/types.h>
 
 /* Built-in __init functions needn't be compiled with retpoline */
@@ -143,6 +145,7 @@ struct file_system_type;
 extern int do_one_initcall(initcall_t fn);
 extern char __initdata boot_command_line[];
 extern char *saved_command_line;
+extern unsigned int saved_command_line_len;
 extern unsigned int reset_devices;
 
 /* used by init/main.c */
diff --git a/include/linux/io-mapping.h b/include/linux/io-mapping.h
index 66a774d2710e..09d4f17c8d3b 100644
--- a/include/linux/io-mapping.h
+++ b/include/linux/io-mapping.h
@@ -213,7 +213,7 @@ io_mapping_free(struct io_mapping *iomap)
 	kfree(iomap);
 }
 
-#endif /* _LINUX_IO_MAPPING_H */
-
 int io_mapping_map_user(struct io_mapping *iomap, struct vm_area_struct *vma,
 		unsigned long addr, unsigned long pfn, unsigned long size);
+
+#endif /* _LINUX_IO_MAPPING_H */
diff --git a/include/linux/kcov.h b/include/linux/kcov.h
index 55dc338f6bcd..ee04256f28af 100644
--- a/include/linux/kcov.h
+++ b/include/linux/kcov.h
@@ -56,7 +56,7 @@ static inline void kcov_remote_start_usb(u64 id)
 /*
  * The softirq flavor of kcov_remote_*() functions is introduced as a temporary
  * work around for kcov's lack of nested remote coverage sections support in
- * task context. Adding suport for nested sections is tracked in:
+ * task context. Adding support for nested sections is tracked in:
  * https://bugzilla.kernel.org/show_bug.cgi?id=210337
  */
 
diff --git a/include/linux/kexec.h b/include/linux/kexec.h
index 41a686996aaa..5dd4343c1bbe 100644
--- a/include/linux/kexec.h
+++ b/include/linux/kexec.h
@@ -17,6 +17,7 @@
 
 #include <linux/crash_core.h>
 #include <asm/io.h>
+#include <linux/range.h>
 
 #include <uapi/linux/kexec.h>
 #include <linux/verification.h>
@@ -240,14 +241,10 @@ static inline int arch_kexec_locate_mem_hole(struct kexec_buf *kbuf)
 /* Alignment required for elf header segment */
 #define ELF_CORE_HEADER_ALIGN   4096
 
-struct crash_mem_range {
-	u64 start, end;
-};
-
 struct crash_mem {
 	unsigned int max_nr_ranges;
 	unsigned int nr_ranges;
-	struct crash_mem_range ranges[];
+	struct range ranges[];
 };
 
 extern int crash_exclude_mem_range(struct crash_mem *mem,
diff --git a/include/linux/minmax.h b/include/linux/minmax.h
index 5433c08fcc68..396df1121bff 100644
--- a/include/linux/minmax.h
+++ b/include/linux/minmax.h
@@ -37,6 +37,28 @@
 		__cmp(x, y, op), \
 		__cmp_once(x, y, __UNIQUE_ID(__x), __UNIQUE_ID(__y), op))
 
+#define __clamp(val, lo, hi)	\
+	((val) >= (hi) ? (hi) : ((val) <= (lo) ? (lo) : (val)))
+
+#define __clamp_once(val, lo, hi, unique_val, unique_lo, unique_hi) ({	\
+		typeof(val) unique_val = (val);				\
+		typeof(lo) unique_lo = (lo);				\
+		typeof(hi) unique_hi = (hi);				\
+		__clamp(unique_val, unique_lo, unique_hi); })
+
+#define __clamp_input_check(lo, hi)					\
+        (BUILD_BUG_ON_ZERO(__builtin_choose_expr(			\
+                __is_constexpr((lo) > (hi)), (lo) > (hi), false)))
+
+#define __careful_clamp(val, lo, hi) ({					\
+	__clamp_input_check(lo, hi) +					\
+	__builtin_choose_expr(__typecheck(val, lo) && __typecheck(val, hi) && \
+			      __typecheck(hi, lo) && __is_constexpr(val) && \
+			      __is_constexpr(lo) && __is_constexpr(hi),	\
+		__clamp(val, lo, hi),					\
+		__clamp_once(val, lo, hi, __UNIQUE_ID(__val),		\
+			     __UNIQUE_ID(__lo), __UNIQUE_ID(__hi))); })
+
 /**
  * min - return minimum of two values of the same or compatible types
  * @x: first value
@@ -86,7 +108,7 @@
  * This macro does strict typechecking of @lo/@hi to make sure they are of the
  * same type as @val.  See the unnecessary pointer comparisons.
  */
-#define clamp(val, lo, hi) min((typeof(val))max(val, lo), hi)
+#define clamp(val, lo, hi) __careful_clamp(val, lo, hi)
 
 /*
  * ..and if you can't take the strict
@@ -121,7 +143,7 @@
  * This macro does no typechecking and uses temporary variables of type
  * @type to make all the comparisons.
  */
-#define clamp_t(type, val, lo, hi) min_t(type, max_t(type, val, lo), hi)
+#define clamp_t(type, val, lo, hi) __careful_clamp((type)(val), (type)(lo), (type)(hi))
 
 /**
  * clamp_val - return a value clamped to a given range using val's type
diff --git a/include/linux/regset.h b/include/linux/regset.h
index a00765f0e8cf..9061266dd8de 100644
--- a/include/linux/regset.h
+++ b/include/linux/regset.h
@@ -275,15 +275,15 @@ static inline int user_regset_copyin(unsigned int *pos, unsigned int *count,
 	return 0;
 }
 
-static inline int user_regset_copyin_ignore(unsigned int *pos,
-					    unsigned int *count,
-					    const void **kbuf,
-					    const void __user **ubuf,
-					    const int start_pos,
-					    const int end_pos)
+static inline void user_regset_copyin_ignore(unsigned int *pos,
+					     unsigned int *count,
+					     const void **kbuf,
+					     const void __user **ubuf,
+					     const int start_pos,
+					     const int end_pos)
 {
 	if (*count == 0)
-		return 0;
+		return;
 	BUG_ON(*pos < start_pos);
 	if (end_pos < 0 || *pos < end_pos) {
 		unsigned int copy = (end_pos < 0 ? *count
@@ -295,7 +295,6 @@ static inline int user_regset_copyin_ignore(unsigned int *pos,
 		*pos += copy;
 		*count -= copy;
 	}
-	return 0;
 }
 
 extern int regset_get(struct task_struct *target,
diff --git a/init/initramfs.c b/init/initramfs.c
index 2f5bfb7d7652..62321883fe61 100644
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -461,7 +461,7 @@ static long __init write_buffer(char *buf, unsigned long len)
 
 static long __init flush_buffer(void *bufv, unsigned long len)
 {
-	char *buf = (char *) bufv;
+	char *buf = bufv;
 	long written;
 	long origLen = len;
 	if (message)
diff --git a/init/main.c b/init/main.c
index aa21add5f7c5..d213371cc067 100644
--- a/init/main.c
+++ b/init/main.c
@@ -145,7 +145,8 @@ void (*__initdata late_time_init)(void);
 /* Untouched command line saved by arch-specific code. */
 char __initdata boot_command_line[COMMAND_LINE_SIZE];
 /* Untouched saved command line (eg. for /proc) */
-char *saved_command_line;
+char *saved_command_line __ro_after_init;
+unsigned int saved_command_line_len __ro_after_init;
 /* Command line for parameter parsing */
 static char *static_command_line;
 /* Untouched extra command line */
@@ -667,6 +668,8 @@ static void __init setup_command_line(char *command_line)
 			strcpy(saved_command_line + len, extra_init_args);
 		}
 	}
+
+	saved_command_line_len = strlen(saved_command_line);
 }
 
 /*
@@ -1379,7 +1382,7 @@ static void __init do_initcall_level(int level, char *command_line)
 static void __init do_initcalls(void)
 {
 	int level;
-	size_t len = strlen(saved_command_line) + 1;
+	size_t len = saved_command_line_len + 1;
 	char *command_line;
 
 	command_line = kzalloc(len, GFP_KERNEL);
diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index 467a194b8a2e..d09aa1c1e3e6 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -1726,7 +1726,8 @@ static int __init init_mqueue_fs(void)
 
 	if (!setup_mq_sysctls(&init_ipc_ns)) {
 		pr_warn("sysctl registration failed\n");
-		return -ENOMEM;
+		error = -ENOMEM;
+		goto out_kmem;
 	}
 
 	error = register_filesystem(&mqueue_fs_type);
@@ -1744,8 +1745,9 @@ static int __init init_mqueue_fs(void)
 out_filesystem:
 	unregister_filesystem(&mqueue_fs_type);
 out_sysctl:
-	kmem_cache_destroy(mqueue_inode_cachep);
 	retire_mq_sysctls(&init_ipc_ns);
+out_kmem:
+	kmem_cache_destroy(mqueue_inode_cachep);
 	return error;
 }
 
diff --git a/kernel/acct.c b/kernel/acct.c
index 62200d799b9b..010667ce6080 100644
--- a/kernel/acct.c
+++ b/kernel/acct.c
@@ -320,7 +320,7 @@ void acct_exit_ns(struct pid_namespace *ns)
 }
 
 /*
- *  encode an unsigned long into a comp_t
+ *  encode an u64 into a comp_t
  *
  *  This routine has been adopted from the encode_comp_t() function in
  *  the kern_acct.c file of the FreeBSD operating system. The encoding
@@ -331,7 +331,7 @@ void acct_exit_ns(struct pid_namespace *ns)
 #define	EXPSIZE		3			/* Base 8 (3 bit) exponent. */
 #define	MAXFRACT	((1 << MANTSIZE) - 1)	/* Maximum fractional value. */
 
-static comp_t encode_comp_t(unsigned long value)
+static comp_t encode_comp_t(u64 value)
 {
 	int exp, rnd;
 
@@ -350,6 +350,8 @@ static comp_t encode_comp_t(unsigned long value)
 		exp++;
 	}
 
+	if (exp > (((comp_t) ~0U) >> MANTSIZE))
+		return (comp_t) ~0U;
 	/*
 	 * Clean it up and polish it off.
 	 */
diff --git a/kernel/crash_core.c b/kernel/crash_core.c
index a0eb4d5cf557..87ef6096823f 100644
--- a/kernel/crash_core.c
+++ b/kernel/crash_core.c
@@ -383,6 +383,9 @@ void vmcoreinfo_append_str(const char *fmt, ...)
 	memcpy(&vmcoreinfo_data[vmcoreinfo_size], buf, r);
 
 	vmcoreinfo_size += r;
+
+	WARN_ONCE(vmcoreinfo_size == VMCOREINFO_BYTES,
+		  "vmcoreinfo data exceeds allocated size, truncating");
 }
 
 /*
diff --git a/kernel/kcsan/Makefile b/kernel/kcsan/Makefile
index 4f35d1bced6a..8cf70f068d92 100644
--- a/kernel/kcsan/Makefile
+++ b/kernel/kcsan/Makefile
@@ -17,4 +17,5 @@ KCSAN_INSTRUMENT_BARRIERS_selftest.o := y
 obj-$(CONFIG_KCSAN_SELFTEST) += selftest.o
 
 CFLAGS_kcsan_test.o := $(CFLAGS_KCSAN) -g -fno-omit-frame-pointer
+CFLAGS_kcsan_test.o += $(DISABLE_STRUCTLEAK_PLUGIN)
 obj-$(CONFIG_KCSAN_KUNIT_TEST) += kcsan_test.o
diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c
index ca2743f9c634..969e8f52f7da 100644
--- a/kernel/kexec_core.c
+++ b/kernel/kexec_core.c
@@ -561,23 +561,17 @@ static int kimage_add_entry(struct kimage *image, kimage_entry_t entry)
 static int kimage_set_destination(struct kimage *image,
 				   unsigned long destination)
 {
-	int result;
-
 	destination &= PAGE_MASK;
-	result = kimage_add_entry(image, destination | IND_DESTINATION);
 
-	return result;
+	return kimage_add_entry(image, destination | IND_DESTINATION);
 }
 
 
 static int kimage_add_page(struct kimage *image, unsigned long page)
 {
-	int result;
-
 	page &= PAGE_MASK;
-	result = kimage_add_entry(image, page | IND_SOURCE);
 
-	return result;
+	return kimage_add_entry(image, page | IND_SOURCE);
 }
 
 
diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c
index 45637511e0de..dd5983010b7b 100644
--- a/kernel/kexec_file.c
+++ b/kernel/kexec_file.c
@@ -1141,7 +1141,7 @@ int crash_exclude_mem_range(struct crash_mem *mem,
 {
 	int i, j;
 	unsigned long long start, end, p_start, p_end;
-	struct crash_mem_range temp_range = {0, 0};
+	struct range temp_range = {0, 0};
 
 	for (i = 0; i < mem->nr_ranges; i++) {
 		start = mem->ranges[i].start;
diff --git a/kernel/panic.c b/kernel/panic.c
index da323209f583..75fe389e8814 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -25,6 +25,7 @@
 #include <linux/kexec.h>
 #include <linux/panic_notifier.h>
 #include <linux/sched.h>
+#include <linux/string_helpers.h>
 #include <linux/sysrq.h>
 #include <linux/init.h>
 #include <linux/nmi.h>
@@ -744,8 +745,8 @@ static int __init panic_on_taint_setup(char *s)
 	if (s && !strcmp(s, "nousertaint"))
 		panic_on_taint_nousertaint = true;
 
-	pr_info("panic_on_taint: bitmask=0x%lx nousertaint_mode=%sabled\n",
-		panic_on_taint, panic_on_taint_nousertaint ? "en" : "dis");
+	pr_info("panic_on_taint: bitmask=0x%lx nousertaint_mode=%s\n",
+		panic_on_taint, str_enabled_disabled(panic_on_taint_nousertaint));
 
 	return 0;
 }
diff --git a/kernel/relay.c b/kernel/relay.c
index d7edc934c56d..ef12532168d9 100644
--- a/kernel/relay.c
+++ b/kernel/relay.c
@@ -148,13 +148,13 @@ static struct rchan_buf *relay_create_buf(struct rchan *chan)
 {
 	struct rchan_buf *buf;
 
-	if (chan->n_subbufs > KMALLOC_MAX_SIZE / sizeof(size_t *))
+	if (chan->n_subbufs > KMALLOC_MAX_SIZE / sizeof(size_t))
 		return NULL;
 
 	buf = kzalloc(sizeof(struct rchan_buf), GFP_KERNEL);
 	if (!buf)
 		return NULL;
-	buf->padding = kmalloc_array(chan->n_subbufs, sizeof(size_t *),
+	buf->padding = kmalloc_array(chan->n_subbufs, sizeof(size_t),
 				     GFP_KERNEL);
 	if (!buf->padding)
 		goto free_buf;
@@ -507,7 +507,7 @@ struct rchan *relay_open(const char *base_filename,
 	chan->private_data = private_data;
 	if (base_filename) {
 		chan->has_base_filename = 1;
-		strlcpy(chan->base_filename, base_filename, NAME_MAX);
+		strscpy(chan->base_filename, base_filename, NAME_MAX);
 	}
 	chan->cb = cb;
 	kref_init(&chan->kref);
@@ -578,7 +578,7 @@ int relay_late_setup_files(struct rchan *chan,
 	if (!chan || !base_filename)
 		return -EINVAL;
 
-	strlcpy(chan->base_filename, base_filename, NAME_MAX);
+	strscpy(chan->base_filename, base_filename, NAME_MAX);
 
 	mutex_lock(&relay_channels_mutex);
 	/* Is chan already set up? */
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 4cc56c91e06e..0cd1d0f7c1bd 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -2964,7 +2964,7 @@ static void task_numa_work(struct callback_head *work)
 	}
 
 	next_scan = now + msecs_to_jiffies(p->numa_scan_period);
-	if (cmpxchg(&mm->numa_next_scan, migrate, next_scan) != migrate)
+	if (!try_cmpxchg(&mm->numa_next_scan, &migrate, next_scan))
 		return;
 
 	/*
diff --git a/lib/Kconfig b/lib/Kconfig
index 9eb514abcdec..e69c2d819c44 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -529,8 +529,8 @@ config CPUMASK_OFFSTACK
 	  stack overflow.
 
 config FORCE_NR_CPUS
-       bool "NR_CPUS is set to an actual number of CPUs"
-       depends on SMP
+       bool "Set number of CPUs at compile time"
+       depends on SMP && EXPERT && !COMPILE_TEST
        help
          Say Yes if you have NR_CPUS set to an actual number of possible
          CPUs in your system, not to a default value. This forces the core
diff --git a/lib/debugobjects.c b/lib/debugobjects.c
index 4c670d3b6965..df86e649d8be 100644
--- a/lib/debugobjects.c
+++ b/lib/debugobjects.c
@@ -437,6 +437,7 @@ static int object_cpu_offline(unsigned int cpu)
 	struct debug_percpu_free *percpu_pool;
 	struct hlist_node *tmp;
 	struct debug_obj *obj;
+	unsigned long flags;
 
 	/* Remote access is safe as the CPU is dead already */
 	percpu_pool = per_cpu_ptr(&percpu_obj_pool, cpu);
@@ -444,6 +445,12 @@ static int object_cpu_offline(unsigned int cpu)
 		hlist_del(&obj->node);
 		kmem_cache_free(obj_cache, obj);
 	}
+
+	raw_spin_lock_irqsave(&pool_lock, flags);
+	obj_pool_used -= percpu_pool->obj_free;
+	debug_objects_freed += percpu_pool->obj_free;
+	raw_spin_unlock_irqrestore(&pool_lock, flags);
+
 	percpu_pool->obj_free = 0;
 
 	return 0;
@@ -1318,6 +1325,8 @@ static int __init debug_objects_replace_static_objects(void)
 		hlist_add_head(&obj->node, &objects);
 	}
 
+	debug_objects_allocated += i;
+
 	/*
 	 * debug_objects_mem_init() is now called early that only one CPU is up
 	 * and interrupts have been disabled, so it is safe to replace the
@@ -1386,6 +1395,7 @@ void __init debug_objects_mem_init(void)
 		debug_objects_enabled = 0;
 		kmem_cache_destroy(obj_cache);
 		pr_warn("out of memory.\n");
+		return;
 	} else
 		debug_objects_selftest();
 
diff --git a/lib/fonts/fonts.c b/lib/fonts/fonts.c
index 5f4b07b56cd9..973866438608 100644
--- a/lib/fonts/fonts.c
+++ b/lib/fonts/fonts.c
@@ -135,8 +135,8 @@ const struct font_desc *get_default_font(int xres, int yres, u32 font_w,
 		if (res > 20)
 			c += 20 - res;
 
-		if ((font_w & (1 << (f->width - 1))) &&
-		    (font_h & (1 << (f->height - 1))))
+		if ((font_w & (1U << (f->width - 1))) &&
+		    (font_h & (1U << (f->height - 1))))
 			c += 1000;
 
 		if (c > cc) {
diff --git a/lib/llist.c b/lib/llist.c
index 7d78b736e8af..6e668fa5a2c6 100644
--- a/lib/llist.c
+++ b/lib/llist.c
@@ -26,10 +26,10 @@
 bool llist_add_batch(struct llist_node *new_first, struct llist_node *new_last,
 		     struct llist_head *head)
 {
-	struct llist_node *first;
+	struct llist_node *first = READ_ONCE(head->first);
 
 	do {
-		new_last->next = first = READ_ONCE(head->first);
+		new_last->next = first;
 	} while (!try_cmpxchg(&head->first, &first, new_first));
 
 	return !first;
diff --git a/lib/notifier-error-inject.c b/lib/notifier-error-inject.c
index 21016b32d313..2b24ea6c9497 100644
--- a/lib/notifier-error-inject.c
+++ b/lib/notifier-error-inject.c
@@ -15,7 +15,7 @@ static int debugfs_errno_get(void *data, u64 *val)
 	return 0;
 }
 
-DEFINE_SIMPLE_ATTRIBUTE(fops_errno, debugfs_errno_get, debugfs_errno_set,
+DEFINE_SIMPLE_ATTRIBUTE_SIGNED(fops_errno, debugfs_errno_get, debugfs_errno_set,
 			"%lld\n");
 
 static struct dentry *debugfs_create_errno(const char *name, umode_t mode,
diff --git a/lib/oid_registry.c b/lib/oid_registry.c
index e592d48b1974..fe6705cfd780 100644
--- a/lib/oid_registry.c
+++ b/lib/oid_registry.c
@@ -146,7 +146,6 @@ int sprint_oid(const void *data, size_t datasize, char *buffer, size_t bufsize)
 	bufsize -= count;
 
 	while (v < end) {
-		num = 0;
 		n = *v++;
 		if (!(n & 0x80)) {
 			num = n;
diff --git a/lib/radix-tree.c b/lib/radix-tree.c
index 3c78e1e8b2ad..049ba132f7ef 100644
--- a/lib/radix-tree.c
+++ b/lib/radix-tree.c
@@ -1029,7 +1029,7 @@ void *radix_tree_tag_clear(struct radix_tree_root *root,
 {
 	struct radix_tree_node *node, *parent;
 	unsigned long maxindex;
-	int offset;
+	int offset = 0;
 
 	radix_tree_load_root(root, &node, &maxindex);
 	if (index > maxindex)
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 1e5e66ae5a52..78cc595b98ce 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -702,6 +702,17 @@ sub find_standard_signature {
 	return "";
 }
 
+our $obsolete_archives = qr{(?xi:
+	\Qfreedesktop.org/archives/dri-devel\E |
+	\Qlists.infradead.org\E |
+	\Qlkml.org\E |
+	\Qmail-archive.com\E |
+	\Qmailman.alsa-project.org/pipermail\E |
+	\Qmarc.info\E |
+	\Qozlabs.org/pipermail\E |
+	\Qspinics.net\E
+)};
+
 our @typeListMisordered = (
 	qr{char\s+(?:un)?signed},
 	qr{int\s+(?:(?:un)?signed\s+)?short\s},
@@ -3324,6 +3335,12 @@ sub process {
 			$last_git_commit_id_linenr = $linenr if ($line =~ /\bcommit\s*$/i);
 		}
 
+# Check for mailing list archives other than lore.kernel.org
+		if ($rawline =~ m{http.*\b$obsolete_archives}) {
+			WARN("PREFER_LORE_ARCHIVE",
+			     "Use lore.kernel.org archive links when possible - see https://lore.kernel.org/lists.html\n" . $herecurr);
+		}
+
 # Check for added, moved or deleted files
 		if (!$reported_maintainer_file && !$in_commit_log &&
 		    ($line =~ /^(?:new|deleted) file mode\s*\d+\s*$/ ||
@@ -5901,6 +5918,7 @@ sub process {
 			    $dstat !~ /$exceptions/ &&
 			    $dstat !~ /^\.$Ident\s*=/ &&				# .foo =
 			    $dstat !~ /^(?:\#\s*$Ident|\#\s*$Constant)\s*$/ &&		# stringification #foo
+			    $dstat !~ /^case\b/ &&					# case ...
 			    $dstat !~ /^do\s*$Constant\s*while\s*$Constant;?$/ &&	# do {...} while (...); // do {...} while (...)
 			    $dstat !~ /^while\s*$Constant\s*$Constant\s*$/ &&		# while (...) {...}
 			    $dstat !~ /^for\s*$Constant$/ &&				# for (...)
@@ -7128,7 +7146,7 @@ sub process {
 		}
 
 # check for alloc argument mismatch
-		if ($line =~ /\b((?:devm_)?(?:kcalloc|kmalloc_array))\s*\(\s*sizeof\b/) {
+		if ($line =~ /\b((?:devm_)?((?:k|kv)?(calloc|malloc_array)(?:_node)?))\s*\(\s*sizeof\b/) {
 			WARN("ALLOC_ARRAY_ARGS",
 			     "$1 uses number as first arg, sizeof is generally wrong\n" . $herecurr);
 		}
diff --git a/scripts/spelling.txt b/scripts/spelling.txt
index 8435b99452b6..ded8bcfc0247 100644
--- a/scripts/spelling.txt
+++ b/scripts/spelling.txt
@@ -23,6 +23,7 @@ absoulte||absolute
 acccess||access
 acceess||access
 accelaration||acceleration
+accelearion||acceleration
 acceleratoin||acceleration
 accelleration||acceleration
 accesing||accessing
@@ -58,6 +59,7 @@ acording||according
 activete||activate
 actived||activated
 actualy||actually
+actvie||active
 acumulating||accumulating
 acumulative||accumulative
 acumulator||accumulator
@@ -253,6 +255,7 @@ brigde||bridge
 broadcase||broadcast
 broadcat||broadcast
 bufer||buffer
+bufferred||buffered
 bufufer||buffer
 cacluated||calculated
 caculate||calculate
@@ -273,6 +276,7 @@ cant||can't
 cant'||can't
 canot||cannot
 cann't||can't
+cannnot||cannot
 capabilites||capabilities
 capabilties||capabilities
 capabilty||capability
@@ -309,6 +313,7 @@ chiled||child
 chked||checked
 chnage||change
 chnages||changes
+chnange||change
 chnnel||channel
 choosen||chosen
 chouse||chose
@@ -439,6 +444,7 @@ defferred||deferred
 definate||definite
 definately||definitely
 definiation||definition
+definiton||definition
 defintion||definition
 defintions||definitions
 defualt||default
@@ -452,6 +458,7 @@ delare||declare
 delares||declares
 delaring||declaring
 delemiter||delimiter
+delibrately||deliberately
 delievered||delivered
 demodualtor||demodulator
 demension||dimension
@@ -481,6 +488,7 @@ destroied||destroyed
 detabase||database
 deteced||detected
 detectt||detect
+detroyed||destroyed
 develope||develop
 developement||development
 developped||developed
@@ -507,6 +515,7 @@ dimention||dimension
 dimesions||dimensions
 diconnected||disconnected
 disabed||disabled
+disasembler||disassembler
 disble||disable
 disgest||digest
 disired||desired
@@ -666,6 +675,7 @@ finanize||finalize
 findn||find
 finilizes||finalizes
 finsih||finish
+fliter||filter
 flusing||flushing
 folloing||following
 followign||following
@@ -725,6 +735,7 @@ hanled||handled
 happend||happened
 hardare||hardware
 harware||hardware
+hardward||hardware
 havind||having
 heirarchically||hierarchically
 heirarchy||hierarchy
@@ -740,6 +751,7 @@ howver||however
 hsould||should
 hypervior||hypervisor
 hypter||hyper
+idel||idle
 identidier||identifier
 iligal||illegal
 illigal||illegal
@@ -931,9 +943,11 @@ matchs||matches
 mathimatical||mathematical
 mathimatic||mathematic
 mathimatics||mathematics
+maxmium||maximum
 maximium||maximum
 maxium||maximum
 mechamism||mechanism
+mechanim||mechanism
 meetign||meeting
 memeory||memory
 memmber||member
@@ -942,6 +956,7 @@ memroy||memory
 ment||meant
 mergable||mergeable
 mesage||message
+mesages||messages
 messags||messages
 messgaes||messages
 messsage||message
@@ -983,8 +998,9 @@ monochromo||monochrome
 monocrome||monochrome
 mopdule||module
 mroe||more
-multipler||multiplier
 mulitplied||multiplied
+muliple||multiple
+multipler||multiplier
 multidimensionnal||multidimensional
 multipe||multiple
 multple||multiple
@@ -1109,6 +1125,7 @@ peroid||period
 persistance||persistence
 persistant||persistent
 phoneticly||phonetically
+plaform||platform
 plalform||platform
 platfoem||platform
 platfrom||platform
@@ -1236,6 +1253,7 @@ refering||referring
 refernces||references
 refernnce||reference
 refrence||reference
+regiser||register
 registed||registered
 registerd||registered
 registeration||registration
@@ -1276,6 +1294,7 @@ reseting||resetting
 reseved||reserved
 reseverd||reserved
 resizeable||resizable
+resotre||restore
 resouce||resource
 resouces||resources
 resoures||resources
@@ -1314,6 +1333,7 @@ runtine||runtime
 sacrifying||sacrificing
 safly||safely
 safty||safety
+satify||satisfy
 savable||saveable
 scaleing||scaling
 scaned||scanned
@@ -1365,10 +1385,12 @@ similiar||similar
 simlar||similar
 simliar||similar
 simpified||simplified
+simultaneusly||simultaneously
 simultanous||simultaneous
 singaled||signaled
 singal||signal
 singed||signed
+slect||select
 sleeped||slept
 sliped||slipped
 softwade||software
@@ -1438,6 +1460,7 @@ suported||supported
 suport||support
 supportet||supported
 suppored||supported
+supporing||supporting
 supportin||supporting
 suppoted||supported
 suppported||supported
@@ -1475,15 +1498,18 @@ sytem||system
 sythesis||synthesis
 taht||that
 tained||tainted
+tarffic||traffic
 tansmit||transmit
 targetted||targeted
 targetting||targeting
 taskelt||tasklet
 teh||the
+temeprature||temperature
 temorary||temporary
 temproarily||temporarily
 temperture||temperature
 thead||thread
+theads||threads
 therfore||therefore
 thier||their
 threds||threads
@@ -1533,12 +1559,14 @@ ture||true
 tyep||type
 udpate||update
 uesd||used
+unknwon||unknown
 uknown||unknown
 usccess||success
 uncommited||uncommitted
 uncompatible||incompatible
 unconditionaly||unconditionally
 undeflow||underflow
+undelying||underlying
 underun||underrun
 unecessary||unnecessary
 unexecpted||unexpected
@@ -1569,11 +1597,14 @@ unneedingly||unnecessarily
 unnsupported||unsupported
 unmached||unmatched
 unprecise||imprecise
+unpriviledged||unprivileged
+unpriviliged||unprivileged
 unregester||unregister
 unresgister||unregister
 unrgesiter||unregister
 unsinged||unsigned
 unstabel||unstable
+unsolicted||unsolicited
 unsolicitied||unsolicited
 unsuccessfull||unsuccessful
 unsuported||unsupported
diff --git a/tools/accounting/procacct.c b/tools/accounting/procacct.c
index 8353d3237e50..90c4a37f53d9 100644
--- a/tools/accounting/procacct.c
+++ b/tools/accounting/procacct.c
@@ -261,25 +261,20 @@ void handle_aggr(int mother, struct nlattr *na, int fd)
 
 int main(int argc, char *argv[])
 {
-	int c, rc, rep_len, aggr_len, len2;
-	int cmd_type = TASKSTATS_CMD_ATTR_UNSPEC;
+	int c, rc, rep_len;
 	__u16 id;
 	__u32 mypid;
 
 	struct nlattr *na;
 	int nl_sd = -1;
 	int len = 0;
-	pid_t tid = 0;
 
 	int fd = 0;
 	int write_file = 0;
 	int maskset = 0;
 	char *logfile = NULL;
-	int containerset = 0;
-	char *containerpath = NULL;
 	int cfd = 0;
 	int forking = 0;
-	sigset_t sigset;
 
 	struct msgtemplate msg;
 
diff --git a/tools/testing/selftests/cgroup/cgroup_util.c b/tools/testing/selftests/cgroup/cgroup_util.c
index 4c52cc6f2f9c..e8bbbdb77e0d 100644
--- a/tools/testing/selftests/cgroup/cgroup_util.c
+++ b/tools/testing/selftests/cgroup/cgroup_util.c
@@ -555,6 +555,7 @@ int proc_mount_contains(const char *option)
 ssize_t proc_read_text(int pid, bool thread, const char *item, char *buf, size_t size)
 {
 	char path[PATH_MAX];
+	ssize_t ret;
 
 	if (!pid)
 		snprintf(path, sizeof(path), "/proc/%s/%s",
@@ -562,8 +563,8 @@ ssize_t proc_read_text(int pid, bool thread, const char *item, char *buf, size_t
 	else
 		snprintf(path, sizeof(path), "/proc/%d/%s", pid, item);
 
-	size = read_text(path, buf, size);
-	return size < 0 ? -1 : size;
+	ret = read_text(path, buf, size);
+	return ret < 0 ? -1 : ret;
 }
 
 int proc_read_strstr(int pid, bool thread, const char *item, const char *needle)
diff --git a/tools/testing/selftests/proc/proc-uptime-002.c b/tools/testing/selftests/proc/proc-uptime-002.c
index e7ceabed7f51..7d0aa22bdc12 100644
--- a/tools/testing/selftests/proc/proc-uptime-002.c
+++ b/tools/testing/selftests/proc/proc-uptime-002.c
@@ -17,6 +17,7 @@
 // while shifting across CPUs.
 #undef NDEBUG
 #include <assert.h>
+#include <errno.h>
 #include <unistd.h>
 #include <sys/syscall.h>
 #include <stdlib.h>
@@ -54,7 +55,7 @@ int main(void)
 		len += sizeof(unsigned long);
 		free(m);
 		m = malloc(len);
-	} while (sys_sched_getaffinity(0, len, m) == -EINVAL);
+	} while (sys_sched_getaffinity(0, len, m) == -1 && errno == EINVAL);
 
 	fd = open("/proc/uptime", O_RDONLY);
 	assert(fd >= 0);
diff --git a/tools/testing/selftests/vm/.gitignore b/tools/testing/selftests/vm/.gitignore
index 7b9dc2426f18..a8fbf8548bc0 100644
--- a/tools/testing/selftests/vm/.gitignore
+++ b/tools/testing/selftests/vm/.gitignore
@@ -33,3 +33,5 @@ memfd_secret
 soft-dirty
 split_huge_page_test
 ksm_tests
+local_config.h
+local_config.mk