Merge tag 'v3.8-rc5' into x86/mm

The __pa() fixup series that follows touches KVM code that is not
present in the existing branch based on v3.7-rc5, so merge in the
current upstream from Linus.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

17 files changed, 74 insertions, 128 deletions

diff --git a/arch/c6x/Kconfig b/arch/c6x/Kconfig
index aee1b569ee6e..f6a3648f5ec3 100644
--- a/arch/c6x/Kconfig
+++ b/arch/c6x/Kconfig
@@ -17,7 +17,6 @@ config C6X
 	select OF
 	select OF_EARLY_FLATTREE
 	select GENERIC_CLOCKEVENTS
-	select GENERIC_KERNEL_THREAD
 	select MODULES_USE_ELF_RELA
 
 config MMU
diff --git a/arch/c6x/Makefile b/arch/c6x/Makefile
index a9eb9597e03c..e72eb3417239 100644
--- a/arch/c6x/Makefile
+++ b/arch/c6x/Makefile
@@ -41,7 +41,7 @@ DTB:=$(subst dtbImage.,,$(filter dtbImage.%, $(MAKECMDGOALS)))
 export DTB
 
 ifneq ($(DTB),)
-core-y	+= $(boot)/
+core-y	+= $(boot)/dts/
 endif
 
 # With make 3.82 we cannot mix normal and wildcard targets
diff --git a/arch/c6x/boot/Makefile b/arch/c6x/boot/Makefile
index 6891257d514c..8734abee548e 100644
--- a/arch/c6x/boot/Makefile
+++ b/arch/c6x/boot/Makefile
@@ -6,25 +6,5 @@ OBJCOPYFLAGS_vmlinux.bin := -O binary
 $(obj)/vmlinux.bin: vmlinux FORCE
 	$(call if_changed,objcopy)
 
-DTC_FLAGS ?= -p 1024
-
-ifneq ($(DTB),)
-obj-y += linked_dtb.o
-endif
-
-$(obj)/%.dtb: $(src)/dts/%.dts FORCE
-	$(call if_changed_dep,dtc)
-
-quiet_cmd_cp = CP      $< $@$2
-	cmd_cp = cat $< >$@$2 || (rm -f $@ && echo false)
-
-# Generate builtin.dtb from $(DTB).dtb
-$(obj)/builtin.dtb: $(obj)/$(DTB).dtb
-	$(call if_changed,cp)
-
-$(obj)/linked_dtb.o: $(obj)/builtin.dtb
-
 $(obj)/dtbImage.%: vmlinux
 	$(call if_changed,objcopy)
-
-clean-files := $(obj)/*.dtb
diff --git a/arch/c6x/boot/dts/Makefile b/arch/c6x/boot/dts/Makefile
new file mode 100644
index 000000000000..c7528b02d061
--- /dev/null
+++ b/arch/c6x/boot/dts/Makefile
@@ -0,0 +1,20 @@
+#
+# Makefile for device trees
+#
+
+DTC_FLAGS ?= -p 1024
+
+ifneq ($(DTB),)
+obj-y += linked_dtb.o
+endif
+
+quiet_cmd_cp = CP      $< $@$2
+	cmd_cp = cat $< >$@$2 || (rm -f $@ && echo false)
+
+# Generate builtin.dtb from $(DTB).dtb
+$(obj)/builtin.dtb: $(obj)/$(DTB).dtb
+	$(call if_changed,cp)
+
+$(obj)/linked_dtb.o: $(obj)/builtin.dtb
+
+clean-files := *.dtb
diff --git a/arch/c6x/boot/dts/linked_dtb.S b/arch/c6x/boot/dts/linked_dtb.S
new file mode 100644
index 000000000000..cf347f1d16ce
--- /dev/null
+++ b/arch/c6x/boot/dts/linked_dtb.S
@@ -0,0 +1,2 @@
+.section __fdt_blob,"a"
+.incbin "arch/c6x/boot/dts/builtin.dtb"
diff --git a/arch/c6x/boot/linked_dtb.S b/arch/c6x/boot/linked_dtb.S
deleted file mode 100644
index 57a4454eaec3..000000000000
--- a/arch/c6x/boot/linked_dtb.S
+++ /dev/null
@@ -1,2 +0,0 @@
-.section __fdt_blob,"a"
-.incbin "arch/c6x/boot/builtin.dtb"
diff --git a/arch/c6x/include/asm/Kbuild b/arch/c6x/include/asm/Kbuild
index 112a496d8355..4258b088aa93 100644
--- a/arch/c6x/include/asm/Kbuild
+++ b/arch/c6x/include/asm/Kbuild
@@ -25,6 +25,7 @@ generic-y += kdebug.h
 generic-y += kmap_types.h
 generic-y += local.h
 generic-y += mman.h
+generic-y += mmu.h
 generic-y += mmu_context.h
 generic-y += msgbuf.h
 generic-y += param.h
@@ -49,6 +50,7 @@ generic-y += termbits.h
 generic-y += termios.h
 generic-y += tlbflush.h
 generic-y += topology.h
+generic-y += trace_clock.h
 generic-y += types.h
 generic-y += ucontext.h
 generic-y += user.h
diff --git a/arch/c6x/include/asm/dma-mapping.h b/arch/c6x/include/asm/dma-mapping.h
index 03579fd99dba..3c694065030f 100644
--- a/arch/c6x/include/asm/dma-mapping.h
+++ b/arch/c6x/include/asm/dma-mapping.h
@@ -32,6 +32,7 @@ static inline int dma_set_mask(struct device *dev, u64 dma_mask)
  */
 static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
 {
+	debug_dma_mapping_error(dev, dma_addr);
 	return dma_addr == ~0;
 }
 
diff --git a/arch/c6x/include/asm/mmu.h b/arch/c6x/include/asm/mmu.h
deleted file mode 100644
index 4467e770a1ce..000000000000
--- a/arch/c6x/include/asm/mmu.h
+++ /dev/null
@@ -1,22 +0,0 @@
-/*
- *  Port on Texas Instruments TMS320C6x architecture
- *
- *  Copyright (C) 2004, 2009, 2010 Texas Instruments Incorporated
- *  Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2 as
- *  published by the Free Software Foundation.
- */
-#ifndef _ASM_C6X_MMU_H
-#define _ASM_C6X_MMU_H
-
-typedef struct {
-	unsigned long		end_brk;
-#ifdef CONFIG_BINFMT_ELF_FDPIC
-	unsigned long	exec_fdpic_loadmap;
-	unsigned long	interp_fdpic_loadmap;
-#endif
-} mm_context_t;
-
-#endif /* _ASM_C6X_MMU_H */
diff --git a/arch/c6x/include/asm/setup.h b/arch/c6x/include/asm/setup.h
new file mode 100644
index 000000000000..ecead15872a6
--- /dev/null
+++ b/arch/c6x/include/asm/setup.h
@@ -0,0 +1,33 @@
+/*
+ *  Port on Texas Instruments TMS320C6x architecture
+ *
+ *  Copyright (C) 2004, 2009, 2010 2011 Texas Instruments Incorporated
+ *  Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation.
+ */
+#ifndef _ASM_C6X_SETUP_H
+#define _ASM_C6X_SETUP_H
+
+#include <uapi/asm/setup.h>
+
+#ifndef __ASSEMBLY__
+extern char c6x_command_line[COMMAND_LINE_SIZE];
+
+extern int c6x_add_memory(phys_addr_t start, unsigned long size);
+
+extern unsigned long ram_start;
+extern unsigned long ram_end;
+
+extern int c6x_num_cores;
+extern unsigned int c6x_silicon_rev;
+extern unsigned int c6x_devstat;
+extern unsigned char c6x_fuse_mac[6];
+
+extern void machine_init(unsigned long dt_ptr);
+extern void time_init(void);
+
+#endif /* !__ASSEMBLY__ */
+#endif /* _ASM_C6X_SETUP_H */
diff --git a/arch/c6x/include/asm/syscalls.h b/arch/c6x/include/asm/syscalls.h
index e7b8991dc07c..df3d05feb153 100644
--- a/arch/c6x/include/asm/syscalls.h
+++ b/arch/c6x/include/asm/syscalls.h
@@ -41,10 +41,6 @@ extern long sys_fallocate_c6x(int fd, int mode,
 			      u32 len_lo, u32 len_hi);
 extern int sys_cache_sync(unsigned long s, unsigned long e);
 
-struct pt_regs;
-
-extern asmlinkage long sys_c6x_clone(struct pt_regs *regs);
-
 #include <asm-generic/syscalls.h>
 
 #endif /* __ASM_C6X_SYSCALLS_H */
diff --git a/arch/c6x/include/uapi/asm/Kbuild b/arch/c6x/include/uapi/asm/Kbuild
index c312b424c433..e9bc2b2b8147 100644
--- a/arch/c6x/include/uapi/asm/Kbuild
+++ b/arch/c6x/include/uapi/asm/Kbuild
@@ -1,6 +1,8 @@
 # UAPI Header export list
 include include/uapi/asm-generic/Kbuild.asm
 
+generic-y += kvm_para.h
+
 header-y += byteorder.h
 header-y += kvm_para.h
 header-y += ptrace.h
diff --git a/arch/c6x/include/uapi/asm/kvm_para.h b/arch/c6x/include/uapi/asm/kvm_para.h
deleted file mode 100644
index 14fab8f0b957..000000000000
--- a/arch/c6x/include/uapi/asm/kvm_para.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/kvm_para.h>
diff --git a/arch/c6x/include/uapi/asm/setup.h b/arch/c6x/include/uapi/asm/setup.h
index a01e31896fa9..ad9ac97a8dad 100644
--- a/arch/c6x/include/uapi/asm/setup.h
+++ b/arch/c6x/include/uapi/asm/setup.h
@@ -1,33 +1,6 @@
-/*
- *  Port on Texas Instruments TMS320C6x architecture
- *
- *  Copyright (C) 2004, 2009, 2010 2011 Texas Instruments Incorporated
- *  Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2 as
- *  published by the Free Software Foundation.
- */
-#ifndef _ASM_C6X_SETUP_H
-#define _ASM_C6X_SETUP_H
+#ifndef _UAPI_ASM_C6X_SETUP_H
+#define _UAPI_ASM_C6X_SETUP_H
 
 #define COMMAND_LINE_SIZE   1024
 
-#ifndef __ASSEMBLY__
-extern char c6x_command_line[COMMAND_LINE_SIZE];
-
-extern int c6x_add_memory(phys_addr_t start, unsigned long size);
-
-extern unsigned long ram_start;
-extern unsigned long ram_end;
-
-extern int c6x_num_cores;
-extern unsigned int c6x_silicon_rev;
-extern unsigned int c6x_devstat;
-extern unsigned char c6x_fuse_mac[6];
-
-extern void machine_init(unsigned long dt_ptr);
-extern void time_init(void);
-
-#endif /* !__ASSEMBLY__ */
-#endif /* _ASM_C6X_SETUP_H */
+#endif /* _UAPI_ASM_C6X_SETUP_H */
diff --git a/arch/c6x/include/uapi/asm/unistd.h b/arch/c6x/include/uapi/asm/unistd.h
index 4ff747d12dad..e7d09a614d10 100644
--- a/arch/c6x/include/uapi/asm/unistd.h
+++ b/arch/c6x/include/uapi/asm/unistd.h
@@ -14,8 +14,7 @@
  *   more details.
  */
 
-#define __ARCH_WANT_KERNEL_EXECVE
-#define __ARCH_WANT_SYS_EXECVE
+#define __ARCH_WANT_SYS_CLONE
 
 /* Use the standard ABI for syscalls. */
 #include <asm-generic/unistd.h>
diff --git a/arch/c6x/kernel/entry.S b/arch/c6x/kernel/entry.S
index 5449c36018fe..5239057de4c4 100644
--- a/arch/c6x/kernel/entry.S
+++ b/arch/c6x/kernel/entry.S
@@ -277,6 +277,8 @@ work_rescheduled:
  [A1]	BNOP	.S1	work_resched,5
 
 work_notifysig:
+	;; enable interrupts for do_notify_resume()
+	UNMASK_INT B2
 	B	.S2	do_notify_resume
 	LDW	.D2T1	*+SP(REGS__END+8),A6 ; syscall flag
 	ADDKPC	.S2	resume_userspace,B3,1
@@ -413,22 +415,11 @@ ENTRY(ret_from_kernel_thread)
 0:
 	B	.S2	B10		   /* call fn */
 	LDW	.D2T1	*+SP(REGS_A1+8),A4 /* get arg */
-	MVKL	.S2	sys_exit,B11
-	MVKH	.S2	sys_exit,B11
-	ADDKPC	.S2	0f,B3,1
-0:
-	BNOP	.S2	B11,5	/* jump to sys_exit */
+	ADDKPC	.S2	ret_from_fork_2,B3,3
 ENDPROC(ret_from_kernel_thread)
 
-ENTRY(ret_from_kernel_execve)
-	GET_THREAD_INFO A12
-	BNOP	.S2	syscall_exit,4
-	ADD	.D2X	A4,-8,SP
-ENDPROC(ret_from_kernel_execve)
-
 	;;
-	;; These are the interrupt handlers, responsible for calling __do_IRQ()
-	;; int6 is used for syscalls (see _system_call entry)
+	;; These are the interrupt handlers, responsible for calling c6x_do_IRQ()
 	;;
 	.macro SAVE_ALL_INT
 	SAVE_ALL IRP,ITSR
@@ -623,18 +614,6 @@ ENDPROC(sys_sigaltstack)
 	;; Special system calls
 	;; return address is in B3
 	;;
-ENTRY(sys_clone)
-	ADD	.D1X	SP,8,A4
-#ifdef CONFIG_C6X_BIG_KERNEL
- ||	MVKL	.S1	sys_c6x_clone,A0
-	MVKH	.S1	sys_c6x_clone,A0
-	BNOP	.S2X	A0,5
-#else
- ||	B	.S2	sys_c6x_clone
-	NOP	5
-#endif
-ENDPROC(sys_clone)
-
 ENTRY(sys_rt_sigreturn)
 	ADD	.D1X	SP,8,A4
 #ifdef CONFIG_C6X_BIG_KERNEL
diff --git a/arch/c6x/kernel/process.c b/arch/c6x/kernel/process.c
index 2770d9a9a84e..6434df476f77 100644
--- a/arch/c6x/kernel/process.c
+++ b/arch/c6x/kernel/process.c
@@ -112,22 +112,6 @@ void exit_thread(void)
 {
 }
 
-SYSCALL_DEFINE1(c6x_clone, struct pt_regs *, regs)
-{
-	unsigned long clone_flags;
-	unsigned long newsp;
-
-	/* syscall puts clone_flags in A4 and usp in B4 */
-	clone_flags = regs->orig_a4;
-	if (regs->b4)
-		newsp = regs->b4;
-	else
-		newsp = regs->sp;
-
-	return do_fork(clone_flags, newsp, regs, 0, (int __user *)regs->a6,
-		       (int __user *)regs->b6);
-}
-
 /*
  * Do necessary setup to start up a newly executed thread.
  */
@@ -155,13 +139,13 @@ void start_thread(struct pt_regs *regs, unsigned int pc, unsigned long usp)
  */
 int copy_thread(unsigned long clone_flags, unsigned long usp,
 		unsigned long ustk_size,
-		struct task_struct *p, struct pt_regs *regs)
+		struct task_struct *p)
 {
 	struct pt_regs *childregs;
 
 	childregs = task_pt_regs(p);
 
-	if (!regs) {
+	if (unlikely(p->flags & PF_KTHREAD)) {
 		/* case of  __kernel_thread: we return to supervisor space */
 		memset(childregs, 0, sizeof(struct pt_regs));
 		childregs->sp = (unsigned long)(childregs + 1);
@@ -170,8 +154,9 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
 		childregs->a1 = ustk_size;	/* argument */
 	} else {
 		/* Otherwise use the given stack */
-		*childregs = *regs;
-		childregs->sp = usp;
+		*childregs = *current_pt_regs();
+		if (usp)
+			childregs->sp = usp;
 		p->thread.pc = (unsigned long) ret_from_fork;
 	}