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2020-12-16Merge tag 'asm-generic-timers-5.11' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic Pull asm-generic cross-architecture timer cleanup from Arnd Bergmann: "This cleans up two ancient timer features that were never completed in the past, CONFIG_GENERIC_CLOCKEVENTS and CONFIG_ARCH_USES_GETTIMEOFFSET. There was only one user left for the ARCH_USES_GETTIMEOFFSET variant of clocksource implementations, the ARM EBSA110 platform. Rather than changing to use modern timekeeping, we remove the platform entirely as Russell no longer uses his machine and nobody else seems to have one any more. The conditional code for using arch_gettimeoffset() is removed as a result. For CONFIG_GENERIC_CLOCKEVENTS, there are still a couple of platforms not using clockevent drivers: parisc, ia64, most of m68k, and one Arm platform. These all do timer ticks slighly differently, and this gets cleaned up to the point they at least all call the same helper function. Instead of most platforms using 'select GENERIC_CLOCKEVENTS' in Kconfig, the polarity is now reversed, with the few remaining ones selecting LEGACY_TIMER_TICK instead" * tag 'asm-generic-timers-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: timekeeping: default GENERIC_CLOCKEVENTS to enabled timekeeping: remove xtime_update m68k: remove timer_interrupt() function m68k: change remaining timers to legacy_timer_tick m68k: m68328: use legacy_timer_tick() m68k: sun3/sun3c: use legacy_timer_tick m68k: split heartbeat out of timer function m68k: coldfire: use legacy_timer_tick() parisc: use legacy_timer_tick ARM: rpc: use legacy_timer_tick ia64: convert to legacy_timer_tick timekeeping: add CONFIG_LEGACY_TIMER_TICK timekeeping: remove arch_gettimeoffset net: remove am79c961a driver ARM: remove ebsa110 platform
2020-12-15Merge tag 'asm-generic-mmu-context-5.11' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic Pull asm-generic mmu-context cleanup from Arnd Bergmann: "This is a cleanup series from Nicholas Piggin, preparing for later changes. The asm/mmu_context.h header are generalized and common code moved to asm-gneneric/mmu_context.h. This saves a bit of code and makes it easier to change in the future" * tag 'asm-generic-mmu-context-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: (25 commits) h8300: Fix generic mmu_context build m68k: mmu_context: Fix Sun-3 build xtensa: use asm-generic/mmu_context.h for no-op implementations x86: use asm-generic/mmu_context.h for no-op implementations um: use asm-generic/mmu_context.h for no-op implementations sparc: use asm-generic/mmu_context.h for no-op implementations sh: use asm-generic/mmu_context.h for no-op implementations s390: use asm-generic/mmu_context.h for no-op implementations riscv: use asm-generic/mmu_context.h for no-op implementations powerpc: use asm-generic/mmu_context.h for no-op implementations parisc: use asm-generic/mmu_context.h for no-op implementations openrisc: use asm-generic/mmu_context.h for no-op implementations nios2: use asm-generic/mmu_context.h for no-op implementations nds32: use asm-generic/mmu_context.h for no-op implementations mips: use asm-generic/mmu_context.h for no-op implementations microblaze: use asm-generic/mmu_context.h for no-op implementations m68k: use asm-generic/mmu_context.h for no-op implementations ia64: use asm-generic/mmu_context.h for no-op implementations hexagon: use asm-generic/mmu_context.h for no-op implementations csky: use asm-generic/mmu_context.h for no-op implementations ...
2020-12-15Merge tag 'asm-generic-cleanup-5.11' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic Pull asm-generic cleanups from Arnd Bergmann: "These are a couple of compiler warning fixes to make 'make W=2' less noisy, as well as some fixes to code comments in asm-generic" * tag 'asm-generic-cleanup-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: syscalls: Fix file comments for syscalls implemented in kernel/sys.c ctype.h: remove duplicate isdigit() helper qspinlock: use signed temporaries for cmpxchg asm-generic: fix ffs -Wshadow warning asm-generic: percpu: avoid Wshadow warning asm-generic/sembuf: Update architecture related information in comment
2020-12-15Merge branch 'akpm' (patches from Andrew)Linus Torvalds
Merge yet more updates from Andrew Morton: - lots of little subsystems - a few post-linux-next MM material. Most of the rest awaits more merging of other trees. Subsystems affected by this series: alpha, procfs, misc, core-kernel, bitmap, lib, lz4, checkpatch, nilfs, kdump, rapidio, gcov, bfs, relay, resource, ubsan, reboot, fault-injection, lzo, apparmor, and mm (swap, memory-hotplug, pagemap, cleanups, and gup). * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (86 commits) mm: fix some spelling mistakes in comments mm: simplify follow_pte{,pmd} mm: unexport follow_pte_pmd apparmor: remove duplicate macro list_entry_is_head() lib/lzo/lzo1x_compress.c: make lzogeneric1x_1_compress() static fault-injection: handle EI_ETYPE_TRUE reboot: hide from sysfs not applicable settings reboot: allow to override reboot type if quirks are found reboot: remove cf9_safe from allowed types and rename cf9_force reboot: allow to specify reboot mode via sysfs reboot: refactor and comment the cpu selection code lib/ubsan.c: mark type_check_kinds with static keyword kcov: don't instrument with UBSAN ubsan: expand tests and reporting ubsan: remove UBSAN_MISC in favor of individual options ubsan: enable for all*config builds ubsan: disable UBSAN_TRAP for all*config ubsan: disable object-size sanitizer under GCC ubsan: move cc-option tests into Kconfig ubsan: remove redundant -Wno-maybe-uninitialized ...
2020-12-15mm: fix some spelling mistakes in commentsHaitao Shi
Fix some spelling mistakes in comments: udpate ==> update succesful ==> successful exmaple ==> example unneccessary ==> unnecessary stoping ==> stopping uknown ==> unknown Link: https://lkml.kernel.org/r/20201127011747.86005-1-shihaitao1@huawei.com Signed-off-by: Haitao Shi <shihaitao1@huawei.com> Reviewed-by: Mike Rapoport <rppt@linux.ibm.com> Reviewed-by: Souptick Joarder <jrdr.linux@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15mm: simplify follow_pte{,pmd}Christoph Hellwig
Merge __follow_pte_pmd, follow_pte_pmd and follow_pte into a single follow_pte function and just pass two additional NULL arguments for the two previous follow_pte callers. [sfr@canb.auug.org.au: merge fix for "s390/pci: remove races against pte updates"] Link: https://lkml.kernel.org/r/20201111221254.7f6a3658@canb.auug.org.au Link: https://lkml.kernel.org/r/20201029101432.47011-3-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Daniel Vetter <daniel@ffwll.ch> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15mm: unexport follow_pte_pmdChristoph Hellwig
Patch series "simplify follow_pte a bit". This small series drops the not needed follow_pte_pmd exports, and simplifies the follow_pte family of functions a bit. This patch (of 2): follow_pte_pmd() is only used by the DAX code, which can't be modular. Link: https://lkml.kernel.org/r/20201029101432.47011-2-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Daniel Vetter <daniel@ffwll.ch> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15apparmor: remove duplicate macro list_entry_is_head()Andy Shevchenko
Strangely I hadn't had noticed the existence of the list_entry_is_head() in apparmor code when added the same one in the list.h. Luckily it's fully identical and didn't break builds. In any case we don't need a duplicate anymore, thus remove it from apparmor code. Link: https://lkml.kernel.org/r/20201208100639.88182-1-andriy.shevchenko@linux.intel.com Fixes: e130816164e244 ("include/linux/list.h: add a macro to test if entry is pointing to the head") Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: John Johansen <john.johansen@canonical.com> Cc: James Morris <jmorris@namei.org> Cc: "Serge E . Hallyn " <serge@hallyn.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15lib/lzo/lzo1x_compress.c: make lzogeneric1x_1_compress() staticJason Yan
Fix the following sparse warning: lib/lzo/lzo1x_compress.c:304:5: warning: symbol 'lzogeneric1x_1_compress' was not declared. Should it be static? Link: https://lkml.kernel.org/r/20201020031415.136874-1-yanaijie@huawei.com Signed-off-by: Jason Yan <yanaijie@huawei.com> Cc: Dave Rodgman <dave.rodgman@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15fault-injection: handle EI_ETYPE_TRUEBarnabás Pőcze
Commit af3b854492f351d1 ("mm/page_alloc.c: allow error injection") introduced EI_ETYPE_TRUE, but did not extend * lib/error-inject.c:error_type_string(), and * kernel/fail_function.c:adjust_error_retval() to accommodate for this change. Handle EI_ETYPE_TRUE in both functions appropriately by * returning "TRUE" in error_type_string(), * adjusting the return value to true (1) in adjust_error_retval(). Furthermore, simplify the logic of handling EI_ETYPE_NULL in adjust_error_retval(). Link: https://lkml.kernel.org/r/njB1czX0ZgWPR9h61euHIBb5bEyePw9D4D2m3i5lc9Cl96P8Q1308dTcmsEZW7Vtz3Ifz4do-rOtSfuFTyGoEDYokkK2aUqBePVptzZEWfU=@protonmail.com Signed-off-by: Barnabás Pőcze <pobrn@protonmail.com> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Reviewed-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: "Naveen N. Rao" <naveen.n.rao@linux.ibm.com> Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15reboot: hide from sysfs not applicable settingsMatteo Croce
Not all the reboot settings from both the kernel command line or sysfs interface are available to all platforms. Filter out reboot_type and reboot_force which are x86 only, and also remove reboot_cpu on kernels without SMP support. This saves some space, and avoid confusing the user with settings which will have no effect. Link: https://lkml.kernel.org/r/20201130173717.198952-3-mcroce@linux.microsoft.com Signed-off-by: Matteo Croce <mcroce@microsoft.com> Reviewed-by: Petr Mladek <pmladek@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15reboot: allow to override reboot type if quirks are foundMatteo Croce
Patch series "reboot: sysfs improvements". Some improvements to the sysfs reboot interface: hide not working settings and support machines with known reboot quirks. This patch (of 2): On some machines a quirk can force a specific reboot type. Quirks are found during a DMI scan, the list of machines which need special reboot handling is defined in reboot_dmi_table. The kernel command line reboot= option overrides this via a global variable `reboot_default`, so that the reboot type requested in the command line is really performed. This was not true when setting the reboot type via the new sysfs interface. Fix this by setting reboot_default upon the first change, like reboot_setup() does for the command line. Link: https://lkml.kernel.org/r/20201130173717.198952-1-mcroce@linux.microsoft.com Link: https://lkml.kernel.org/r/20201130173717.198952-2-mcroce@linux.microsoft.com Signed-off-by: Matteo Croce <mcroce@microsoft.com> Reviewed-by: Petr Mladek <pmladek@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15reboot: remove cf9_safe from allowed types and rename cf9_forceMatteo Croce
BOOT_CF9_SAFE_STR is an internal value used only by the x86 code and it's not possible to set it from userspace. Remove it, and rename 'cf9_force' to 'pci', so to make it coherent with the kernel command line reboot= option. Tested with this script: cd /sys/kernel/reboot/ for i in cold warm hard soft gpio; do echo $i >mode read j <mode [ $i = $j ] || echo "mode $i != $j" done for i in bios acpi kbd triple efi pci; do echo $i >type read j <type [ $i = $j ] || echo "type $i != $j" done for i in $(seq 0 $(nproc --ignore=1)); do echo $i >cpu read j <cpu [ $i = $j ] || echo "cpu $i != $j" done for i in 0 1; do echo $i >force read j <force [ $i = $j ] || echo "force $i != $j" done Link: https://lkml.kernel.org/r/20201113015900.543923-1-mcroce@linux.microsoft.com Fixes: eab8da48579d ("reboot: allow to specify reboot mode via sysfs") Signed-off-by: Matteo Croce <mcroce@microsoft.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Guenter Roeck <linux@roeck-us.net> Cc: Kees Cook <keescook@chromium.org> Cc: Mike Rapoport <rppt@kernel.org> Cc: Nathan Chancellor <natechancellor@gmail.com> Cc: Pavel Tatashin <pasha.tatashin@soleen.com> Cc: Petr Mladek <pmladek@suse.com> Cc: Tyler Hicks <tyhicks@linux.microsoft.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15reboot: allow to specify reboot mode via sysfsMatteo Croce
The kernel cmdline reboot= option offers some sort of control on how the reboot is issued. We don't always know in advance what type of reboot to perform. Sometimes a warm reboot is preferred to persist certain memory regions across the reboot. Others a cold one is needed to apply a future system update that makes a memory memory model change, like changing the base page size or resizing a persistent memory region. Or simply we want to enable reboot_force because we noticed that something bad happened. Add handles in sysfs to allow setting these reboot options, so they can be changed when the system is booted, other than at boot time. The handlers are under <sysfs>/kernel/reboot, can be read to get the current configuration and written to alter it. # cd /sys/kernel/reboot/ # grep . * cpu:0 force:0 mode:cold type:acpi # echo 2 >cpu # echo yes >force # echo soft >mode # echo bios >type # grep . * cpu:2 force:1 mode:soft type:bios Before setting anything, check for CAP_SYS_BOOT capability, so it's possible to allow an unpriviledged process to change these settings simply by relaxing the handles permissions, without opening them to the world. [natechancellor@gmail.com: fix variable assignments in type_store] Link: https://lkml.kernel.org/r/20201112035023.974748-1-natechancellor@gmail.com Link: https://github.com/ClangBuiltLinux/linux/issues/1197 Link: https://lkml.kernel.org/r/20201110202746.9690-1-mcroce@linux.microsoft.com Signed-off-by: Matteo Croce <mcroce@microsoft.com> Signed-off-by: Nathan Chancellor <natechancellor@gmail.com> Reviewed-by: Petr Mladek <pmladek@suse.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Guenter Roeck <linux@roeck-us.net> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Pavel Tatashin <pasha.tatashin@soleen.com> Cc: Kees Cook <keescook@chromium.org> Cc: Tyler Hicks <tyhicks@linux.microsoft.com> Cc: Nathan Chancellor <natechancellor@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15reboot: refactor and comment the cpu selection codeMatteo Croce
Small improvements to the code, without changing the way it works: - use a local variable, to avoid a small time lapse where reboot_cpu can have an invalid value - comment the code which is not easy to understand at a glance - merge two identical code blocks into one - replace pointer arithmetics with equivalent array syntax Link: https://lkml.kernel.org/r/20201103214025.116799-4-mcroce@linux.microsoft.com Signed-off-by: Matteo Croce <mcroce@microsoft.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Fabian Frederick <fabf@skynet.be> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Guenter Roeck <linux@roeck-us.net> Cc: Kees Cook <keescook@chromium.org> Cc: Mike Rapoport <rppt@kernel.org> Cc: Pavel Tatashin <pasha.tatashin@soleen.com> Cc: Petr Mladek <pmladek@suse.com> Cc: Robin Holt <robinmholt@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15lib/ubsan.c: mark type_check_kinds with static keywordZou Wei
Fix the following sparse warning: lib/ubsan.c:20:12: warning: symbol 'type_check_kinds' was not declared. Should it be static? [akpm@linux-foundation.org: make it `static const char * const' while we're in there] Link: https://lkml.kernel.org/r/1607602638-79584-1-git-send-email-zou_wei@huawei.com Signed-off-by: Zou Wei <zou_wei@huawei.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Kees Cook <keescook@chromium.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15kcov: don't instrument with UBSANDmitry Vyukov
Both KCOV and UBSAN use compiler instrumentation. If UBSAN detects a bug in KCOV, it may cause infinite recursion via printk and other common functions. We already don't instrument KCOV with KASAN/KCSAN for this reason, don't instrument it with UBSAN as well. As a side effect this also resolves the following gcc warning: conflicting types for built-in function '__sanitizer_cov_trace_switch'; expected 'void(long unsigned int, void *)' [-Wbuiltin-declaration-mismatch] It's only reported when kcov.c is compiled with any of the sanitizers enabled. Size of the arguments is correct, it's just that gcc uses 'long' on 64-bit arches and 'long long' on 32-bit arches, while kernel type is always 'long long'. Link: https://lkml.kernel.org/r/20201209100152.2492072-1-dvyukov@google.com Signed-off-by: Dmitry Vyukov <dvyukov@google.com> Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Suggested-by: Marco Elver <elver@google.com> Acked-by: Marco Elver <elver@google.com> Reviewed-by: Andrey Konovalov <andreyknvl@google.com> Reviewed-by: Kees Cook <keescook@chromium.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15ubsan: expand tests and reportingKees Cook
Expand the UBSAN tests to include some additional UB cases. Notably the out-of-bounds enum loading appears not to work. Also include per-test reporting, including the relevant CONFIG_UBSAN... Kconfigs. Link: https://lkml.kernel.org/r/20201203004437.389959-8-keescook@chromium.org Signed-off-by: Kees Cook <keescook@chromium.org> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Ard Biesheuvel <ardb@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: George Popescu <georgepope@android.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Marco Elver <elver@google.com> Cc: Masahiro Yamada <masahiroy@kernel.org> Cc: Michal Marek <michal.lkml@markovi.net> Cc: Nathan Chancellor <natechancellor@gmail.com> Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: Peter Oberparleiter <oberpar@linux.ibm.com> Cc: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15ubsan: remove UBSAN_MISC in favor of individual optionsKees Cook
Make each UBSAN option individually selectable and remove UBSAN_MISC which no longer has any purpose. Add help text for each Kconfig, and include a reference to the Clang sanitizer documentation. Disable unsigned overflow by default (not available with GCC and makes x86 unbootable with Clang). Disable unreachable when objtool is in use (redundant and confuses things: instrumentation appears at unreachable locations). Link: https://lkml.kernel.org/r/20201203004437.389959-7-keescook@chromium.org Signed-off-by: Kees Cook <keescook@chromium.org> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Ard Biesheuvel <ardb@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: George Popescu <georgepope@android.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Marco Elver <elver@google.com> Cc: Masahiro Yamada <masahiroy@kernel.org> Cc: Michal Marek <michal.lkml@markovi.net> Cc: Nathan Chancellor <natechancellor@gmail.com> Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: Peter Oberparleiter <oberpar@linux.ibm.com> Cc: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15ubsan: enable for all*config buildsKees Cook
With UBSAN_OBJECT_SIZE disabled for GCC, only UBSAN_ALIGNMENT remained a noisy UBSAN option. Disable it for COMPILE_TEST so the rest of UBSAN can be used for full all*config builds or other large combinations. [sfr@canb.auug.org.au: add .data..Lubsan_data*/.data..Lubsan_type* sections explicitly] Link: https://lkml.kernel.org/r/20201208230157.42c42789@canb.auug.org.au Link: https://lore.kernel.org/lkml/CAHk-=wgXW=YLxGN0QVpp-1w5GDd2pf1W-FqY15poKzoVfik2qA@mail.gmail.com/ Link: https://lkml.kernel.org/r/20201203004437.389959-6-keescook@chromium.org Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Ard Biesheuvel <ardb@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: George Popescu <georgepope@android.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Marco Elver <elver@google.com> Cc: Masahiro Yamada <masahiroy@kernel.org> Cc: Michal Marek <michal.lkml@markovi.net> Cc: Nathan Chancellor <natechancellor@gmail.com> Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: Peter Oberparleiter <oberpar@linux.ibm.com> Cc: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15ubsan: disable UBSAN_TRAP for all*configKees Cook
Doing all*config builds attempts to build as much as possible. UBSAN_TRAP effectively short-circuits lib/usban.c, so it should be disabled for COMPILE_TEST so that the lib/ubsan.c code gets built. Link: https://lkml.kernel.org/r/20201203004437.389959-5-keescook@chromium.org Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Ard Biesheuvel <ardb@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: George Popescu <georgepope@android.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Marco Elver <elver@google.com> Cc: Masahiro Yamada <masahiroy@kernel.org> Cc: Michal Marek <michal.lkml@markovi.net> Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: Peter Oberparleiter <oberpar@linux.ibm.com> Cc: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15ubsan: disable object-size sanitizer under GCCKees Cook
GCC's -fsanitize=object-size (as part of CONFIG_UBSAN_MISC) greatly increases stack utilization. Do not allow this under GCC. Link: https://lkml.kernel.org/r/20201203004437.389959-4-keescook@chromium.org Link: https://lore.kernel.org/lkml/CAHk-=wjPasyJrDuwDnpHJS2TuQfExwe=px-SzLeN8GFMAQJPmQ@mail.gmail.com/ Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Ard Biesheuvel <ardb@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: George Popescu <georgepope@android.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Marco Elver <elver@google.com> Cc: Masahiro Yamada <masahiroy@kernel.org> Cc: Michal Marek <michal.lkml@markovi.net> Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: Peter Oberparleiter <oberpar@linux.ibm.com> Cc: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15ubsan: move cc-option tests into KconfigKees Cook
Instead of doing if/endif blocks with cc-option calls in the UBSAN Makefile, move all the tests into Kconfig and use the Makefile to collect the results. Link: https://lkml.kernel.org/r/20201203004437.389959-3-keescook@chromium.org Link: https://lore.kernel.org/lkml/CAHk-=wjPasyJrDuwDnpHJS2TuQfExwe=px-SzLeN8GFMAQJPmQ@mail.gmail.com/ Signed-off-by: Kees Cook <keescook@chromium.org> Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> Tested-by: Nathan Chancellor <natechancellor@gmail.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Ard Biesheuvel <ardb@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: George Popescu <georgepope@android.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Marco Elver <elver@google.com> Cc: Masahiro Yamada <masahiroy@kernel.org> Cc: Michal Marek <michal.lkml@markovi.net> Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: Peter Oberparleiter <oberpar@linux.ibm.com> Cc: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15ubsan: remove redundant -Wno-maybe-uninitializedKees Cook
Patch series "Clean up UBSAN Makefile", v2. This series attempts to address the issues seen with UBSAN's object-size sanitizer causing problems under GCC. In the process, the Kconfig and Makefile are refactored to do all the cc-option calls in the Kconfig. Additionally start to detangle -Wno-maybe-uninitialized, disable UBSAN_TRAP under COMPILE_TEST for wider build coverage, and expand the libusan tests. This patch (of 7): In commit 78a5255ffb6a ("Stop the ad-hoc games with -Wno-maybe-initialized") -Wmaybe-uninitialized was disabled globally, so keeping the disabling logic here too doesn't make sense. Link: https://lkml.kernel.org/r/20201203004437.389959-1-keescook@chromium.org Link: https://lkml.kernel.org/r/20201203004437.389959-2-keescook@chromium.org Signed-off-by: Kees Cook <keescook@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Ard Biesheuvel <ardb@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Masahiro Yamada <masahiroy@kernel.org> Cc: Michal Marek <michal.lkml@markovi.net> Cc: Nathan Chancellor <natechancellor@gmail.com> Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: Marco Elver <elver@google.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: George Popescu <georgepope@android.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Peter Oberparleiter <oberpar@linux.ibm.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15kernel/resource.c: fix kernel-doc markupsMauro Carvalho Chehab
Kernel-doc markups should use this format: identifier - description While here, fix a kernel-doc tag that was using, instead, a normal comment block. [akpm@linux-foundation.org: coding style fixes] Link: https://lkml.kernel.org/r/c5e38e1070f8dbe2f9607a10b44afe2875bd966c.1605521731.git.mchehab+huawei@kernel.org Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Cc: "Jonathan Corbet" <corbet@lwn.net> Cc: Matthew Wilcox <willy@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15blktrace: make relay callbacks constJani Nikula
Now that relay_open() accepts const callbacks, make relay callbacks const. Link: https://lkml.kernel.org/r/7ff5ce0b735901eb4f10e13da2704f1d8c4a2507.1606153547.git.jani.nikula@intel.com Signed-off-by: Jani Nikula <jani.nikula@intel.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: Jens Axboe <axboe@kernel.dk> Cc: Kalle Valo <kvalo@codeaurora.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15ath9k: make relay callbacks constJani Nikula
Now that relay_open() accepts const callbacks, make relay callbacks const. Link: https://lkml.kernel.org/r/7db0286c428f3a478dd7544afef04a3b131f1aa0.1606153547.git.jani.nikula@intel.com Signed-off-by: Jani Nikula <jani.nikula@intel.com> Acked-by: Kalle Valo <kvalo@codeaurora.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15ath11k: make relay callbacks constJani Nikula
Now that relay_open() accepts const callbacks, make relay callbacks const. Link: https://lkml.kernel.org/r/44e3d65b71025c462948d0c554061dc7b40ab488.1606153547.git.jani.nikula@intel.com Signed-off-by: Jani Nikula <jani.nikula@intel.com> Acked-by: Kalle Valo <kvalo@codeaurora.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15ath10k: make relay callbacks constJani Nikula
Now that relay_open() accepts const callbacks, make relay callbacks const. Link: https://lkml.kernel.org/r/85cabc6d4b0d0ca43d4e0fb94897ccd16e3b7930.1606153547.git.jani.nikula@intel.com Signed-off-by: Jani Nikula <jani.nikula@intel.com> Acked-by: Kalle Valo <kvalo@codeaurora.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15drm/i915: make relay callbacks constJani Nikula
Now that relay_open() accepts const callbacks, make relay callbacks const. Link: https://lkml.kernel.org/r/534d089f413db98aa0b94773fa49d5275d0d3c25.1606153547.git.jani.nikula@intel.com Signed-off-by: Jani Nikula <jani.nikula@intel.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: Jens Axboe <axboe@kernel.dk> Cc: Kalle Valo <kvalo@codeaurora.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15relay: allow the use of const callback structsJani Nikula
None of the relay users require the use of mutable structs for callbacks, however the relay code does. Instead of assigning the default callback for subbuf_start, add a wrapper to conditionally call the client callback if available, and fall back to default behaviour otherwise. This lets all relay users make their struct rchan_callbacks const data. [jani.nikula@intel.com: cleanups, per Christoph] Link: https://lkml.kernel.org/r/20201124115412.32402-1-jani.nikula@intel.com Link: https://lkml.kernel.org/r/cc3ff292e4eb4fdc56bee3d690c7b8e39209cd37.1606153547.git.jani.nikula@intel.com Signed-off-by: Jani Nikula <jani.nikula@intel.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: Jens Axboe <axboe@kernel.dk> Cc: Kalle Valo <kvalo@codeaurora.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15relay: make create_buf_file and remove_buf_file callbacks mandatoryJani Nikula
All clients provide create_buf_file and remove_buf_file callbacks, and they're required for relay to make sense. There is no point in them being optional. Also document whether each callback is mandatory/optional. Link: https://lkml.kernel.org/r/88003c1527386b93036e286e7917f1e33aec84ac.1606153547.git.jani.nikula@intel.com Signed-off-by: Jani Nikula <jani.nikula@intel.com> Suggested-by: Christoph Hellwig <hch@infradead.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: Jens Axboe <axboe@kernel.dk> Cc: Kalle Valo <kvalo@codeaurora.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15relay: require non-NULL callbacks in relay_open()Jani Nikula
There are no clients passing NULL callbacks, which makes sense as it wouldn't even create a file. Require non-NULL callbacks, and throw away the handling for NULL callbacks. Link: https://lkml.kernel.org/r/e40642f3b027d2bb6bc851ddb60e0a61ea51f5f8.1606153547.git.jani.nikula@intel.com Signed-off-by: Jani Nikula <jani.nikula@intel.com> Suggested-by: Christoph Hellwig <hch@infradead.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: Jens Axboe <axboe@kernel.dk> Cc: Kalle Valo <kvalo@codeaurora.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15relay: remove unused buf_mapped and buf_unmapped callbacksJani Nikula
Patch series "relay: cleanup and const callbacks", v2. None of the relay users require the use of mutable structs for callbacks, however the relay code does. Instead of assigning default callbacks when there is none, add callback wrappers to conditionally call the client callbacks if available, and fall back to default behaviour (typically no-op) otherwise. This lets all relay users make their struct rchan_callbacks const data. This series starts with a number of cleanups first based on Christoph's feedback. This patch (of 9): No relay client uses the buf_mapped or buf_unmapped callbacks. Remove them. This makes relay's vm_operations_struct close callback a dummy, remove it as well. Link: https://lkml.kernel.org/r/cover.1606153547.git.jani.nikula@intel.com Link: https://lkml.kernel.org/r/c69fff6e0cd485563604240bbfcc028434983bec.1606153547.git.jani.nikula@intel.com Signed-off-by: Jani Nikula <jani.nikula@intel.com> Suggested-by: Christoph Hellwig <hch@infradead.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: Jens Axboe <axboe@kernel.dk> Cc: Kalle Valo <kvalo@codeaurora.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15bfs: don't use WARNING: string when it's just info.Randy Dunlap
Make the printk() [bfs "printf" macro] seem less severe by changing "WARNING:" to "NOTE:". <asm-generic/bug.h> warns us about using WARNING or BUG in a format string other than in WARN() or BUG() family macros. bfs/inode.c is doing just that in a normal printk() call, so change the "WARNING" string to be "NOTE". Link: https://lkml.kernel.org/r/20201203212634.17278-1-rdunlap@infradead.org Reported-by: syzbot+3fd34060f26e766536ff@syzkaller.appspotmail.com Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Al Viro <viro@ZenIV.linux.org.uk> Cc: "Tigran A. Aivazian" <aivazian.tigran@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15gcov: fix kernel-doc markup issueAlex Shi
Fix the following kernel-doc issue in gcov: kernel/gcov/gcc_4_7.c:238: warning: Function parameter or member 'dst' not described in 'gcov_info_add' kernel/gcov/gcc_4_7.c:238: warning: Function parameter or member 'src' not described in 'gcov_info_add' kernel/gcov/gcc_4_7.c:238: warning: Excess function parameter 'dest' description in 'gcov_info_add' kernel/gcov/gcc_4_7.c:238: warning: Excess function parameter 'source' description in 'gcov_info_add' Link: https://lkml.kernel.org/r/1605252352-63983-1-git-send-email-alex.shi@linux.alibaba.com Signed-off-by: Alex Shi <alex.shi@linux.alibaba.com> Acked-by: Peter Oberparleiter <oberpar@linux.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15gcov: remove support for GCC < 4.9Nick Desaulniers
Since commit 0bddd227f3dc ("Documentation: update for gcc 4.9 requirement") the minimum supported version of GCC is gcc-4.9. It's now safe to remove this code. Similar to commit 10415533a906 ("gcov: Remove old GCC 3.4 support") but that was for GCC 4.8 and this is for GCC 4.9. Link: https://github.com/ClangBuiltLinux/linux/issues/427 Link: https://lkml.kernel.org/r/20201111030557.2015680-1-ndesaulniers@google.com Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15rapidio: remove unused rio_get_asm() and rio_get_device()Sebastian Andrzej Siewior
The functions rio_get_asm() and rio_get_device() are globally exported but have almost no users in tree. The only user is rio_init_mports() which invokes it via rio_init(). rio_init() iterates over every registered device and invokes rio_fixup_device(). It looks like a fixup function which should perform a "change" to the device but does nothing. It has been like this since its introduction in commit 394b701ce4fbf ("[PATCH] RapidIO support: core base") which was merged into v2.6.15-rc1. Remove rio_init() because the performed fixup function (rio_fixup_device()) does nothing. Remove rio_get_asm() and rio_get_device() which have no callers now. Link: https://lkml.kernel.org/r/20201116170004.420143-1-bigeasy@linutronix.de Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Matt Porter <mporter@kernel.crashing.org> Cc: Alexandre Bounine <alex.bou9@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15kdump: append uts_namespace.name offset to VMCOREINFOAlexander Egorenkov
The offset of the field 'init_uts_ns.name' has changed since commit 9a56493f6942 ("uts: Use generic ns_common::count"). Make the offset of the field 'uts_namespace.name' available in VMCOREINFO because tools like 'crash-utility' and 'makedumpfile' must be able to read it from crash dumps. Link: https://lore.kernel.org/r/159644978167.604812.1773586504374412107.stgit@localhost.localdomain Link: https://lkml.kernel.org/r/20200930102328.396488-1-egorenar@linux.ibm.com Signed-off-by: Alexander Egorenkov <egorenar@linux.ibm.com> Acked-by: lijiang <lijiang@redhat.com> Acked-by: Baoquan He <bhe@redhat.com> Cc: Dave Young <dyoung@redhat.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: "Eric W . Biederman" <ebiederm@xmission.com> Cc: Kirill Tkhai <ktkhai@virtuozzo.com> Cc: Kees Cook <keescook@chromium.org> Cc: Christian Brauner <christian.brauner@ubuntu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15fs/nilfs2: remove some unused macros to tame gccAlex Shi
There some macros are unused and cause gcc warning. Remove them. fs/nilfs2/segment.c:137:0: warning: macro "nilfs_cnt32_gt" is not used [-Wunused-macros] fs/nilfs2/segment.c:144:0: warning: macro "nilfs_cnt32_le" is not used [-Wunused-macros] fs/nilfs2/segment.c:143:0: warning: macro "nilfs_cnt32_lt" is not used [-Wunused-macros] Link: https://lkml.kernel.org/r/1607552733-24292-1-git-send-email-konishi.ryusuke@gmail.com Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com> Signed-off-by: Alex Shi <alex.shi@linux.alibaba.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15checkpatch: add printk_once and printk_ratelimit to prefer pr_<level> warningJoe Perches
Add the _once and _ratelimited variants to the test for printk(KERN_<LEVEL> that should prefer pr_<level>. Miscellanea: o Add comment description for the conversions [joe@perches.com: fixlet] Link: https://lkml.kernel.org/r/32260871d4718ba7f48a8e9e07452bb76de300db.camel@perches.comLink: https://lkml.kernel.org/r/993b72b2ef91a57c5e725b52971ce3fd31375061.camel@perches.com Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15checkpatch: fix TYPO_SPELLING check for words with apostropheDwaipayan Ray
checkpatch reports a false TYPO_SPELLING warning for some words containing an apostrophe when run with --codespell option. A false positive is "doesn't". Occurrence of the word causes checkpatch to emit the following warning: "WARNING: 'doesn'' may be misspelled - perhaps 'doesn't'?" Modify the regex pattern to be more in line with the codespell default word matching regex. This fixes the word capture and avoids the false warning. In addition, highlight the misspelled word location by adding a caret below the word. [akpm@linux-foundation.org: make matched misspelling more obvious, per Joe] Link: https://lkml.kernel.org/r/09c24ef1aa2f1c4fe909d76f5426f08780b9d81c.camel@perches.com Link: https://lkml.kernel.org/r/20201201190729.169733-1-dwaipayanray1@gmail.com Signed-off-by: Dwaipayan Ray <dwaipayanray1@gmail.com> Suggested-by: Joe Perches <joe@perches.com> Reported-by: Peilin Ye <yepeilin.cs@gmail.com> Acked-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15checkpatch: add warning for lines starting with a '#' in commit logDwaipayan Ray
Commit log lines starting with '#' are dropped by git as comments. Add a check to emit a warning for these lines. Also add a --fix option to insert a space before the leading '#' in such lines. Link: https://lkml.kernel.org/r/20201202205740.127986-1-dwaipayanray1@gmail.com Signed-off-by: Dwaipayan Ray <dwaipayanray1@gmail.com> Suggested-by: Joe Perches <joe@perches.com> Suggested-by: Peilin Ye <yepeilin.cs@gmail.com> Tested-by: Peilin Ye <yepeilin.cs@gmail.com> Acked-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15checkpatch: add warning for unnecessary use of %h[xudi] and %hh[xudi]Dwaipayan Ray
Modifiers %h and %hh should never be used. Commit cbacb5ab0aa0 ("docs: printk-formats: Stop encouraging use of unnecessary %h[xudi] and %hh[xudi]") specifies that: "Standard integer promotion is already done and %hx and %hhx is useless so do not encourage the use of %hh[xudi] or %h[xudi]." "The "h" and "hh" things should never be used. The only reason for them being used if you have an "int", but you want to print it out as a "char" (and honestly, that is a really bad reason, you'd be better off just using a proper cast to make the code more obvious)." Add a new check to emit a warning on finding an unneeded use of %h or %hh modifier. Also add a fix option to the check. Link: https://lore.kernel.org/lkml/4910042649a4f3ab22fac93191b8c1fa0a2e17c3.camel@perches.com/ Link: https://lkml.kernel.org/r/20201128200046.78739-1-dwaipayanray1@gmail.com Signed-off-by: Dwaipayan Ray <dwaipayanray1@gmail.com> Suggested-by: Joe Perches <joe@perches.com> Suggested-by: Lukas Bulwahn <lukas.bulwahn@gmail.com> Acked-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15checkpatch: add fix and improve warning msg for non-standard signatureAditya Srivastava
Currently checkpatch warns for BAD_SIGN_OFF on non-standard signature styles. A large number of these warnings occur because of typo mistakes in signature tags. An evaluation over v4.13..v5.8 showed that out of 539 warnings due to non-standard signatures, 87 are due to typo mistakes. Following are the standard signature tags which are often incorrectly used, along with their individual counts of incorrect use (over v4.13..v5.8): Reviewed-by: 42 Signed-off-by: 25 Reported-by: 6 Acked-by: 4 Tested-by: 4 Suggested-by: 4 Provide a fix by calculating levenshtein distance for the signature tag with all the standard signatures and suggest a fix with a signature, whose edit distance is less than or equal to 2 with the misspelled signature. Out of the 86 mispelled signatures fixed with this approach, 85 were found to be good corrections and 1 was bad correction. Following was found to be a bad correction: Tweeted-by (count: 1) => Tested-by Link: https://lkml.kernel.org/r/20201128204333.7054-1-yashsri421@gmail.com Signed-off-by: Aditya Srivastava <yashsri421@gmail.com> Acked-by: Joe Perches <joe@perches.com> Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15checkpatch: add fix option for LOGICAL_CONTINUATIONSAditya Srivastava
Currently, checkpatch warns if logical continuations are placed at the start of a line and not at the end of previous line. E.g., running checkpatch on commit 3485507fc272 ("staging: bcm2835-camera: Reduce length of enum names") reports: CHECK:LOGICAL_CONTINUATIONS: Logical continuations should be on the previous line + if (!ret + && camera_port == Provide a simple fix by inserting logical operator at the last non-comment, non-whitespace char of the previous line and removing from current line, if both the lines are additions(ie start with '+') Link: https://lkml.kernel.org/r/20201123102818.24364-1-yashsri421@gmail.com Signed-off-by: Aditya Srivastava <yashsri421@gmail.com> Acked-by: Joe Perches <joe@perches.com> Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15checkpatch: add fix option for ASSIGNMENT_CONTINUATIONSAditya Srivastava
Currently, checkpatch warns us if an assignment operator is placed at the start of a line and not at the end of previous line. E.g., running checkpatch on commit 8195b1396ec8 ("hv_netvsc: fix deadlock on hotplug") reports: CHECK: Assignment operator '=' should be on the previous line + struct netvsc_device *nvdev + = container_of(w, struct netvsc_device, subchan_work); Provide a simple fix by appending assignment operator to the previous line and removing from the current line, if both the lines are additions (ie start with '+') Link: https://lkml.kernel.org/r/20201121120407.22942-1-yashsri421@gmail.com Signed-off-by: Aditya Srivastava <yashsri421@gmail.com> Acked-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15checkpatch: fix unescaped left braceDwaipayan Ray
There is an unescaped left brace in a regex in OPEN_BRACE check. This throws a runtime error when checkpatch is run with --fix flag and the OPEN_BRACE check is executed. Fix it by escaping the left brace. Link: https://lkml.kernel.org/r/20201115202928.81955-1-dwaipayanray1@gmail.com Fixes: 8d1824780f2f ("checkpatch: add --fix option for a couple OPEN_BRACE misuses") Signed-off-by: Dwaipayan Ray <dwaipayanray1@gmail.com> Acked-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15checkpatch: avoid COMMIT_LOG_LONG_LINE warning for signature tagsAditya Srivastava
Currently checkpatch warns us for long lines in commits even for signature tag lines. Generally these lines exceed the 75-character limit because of: 1) long names and long email address 2) some comments on scoped review and acknowledgement, i.e., for a dedicated pointer on what was reported by the identity in 'Reported-by' 3) some additional comments on CC: stable@vger.org tags Exclude signature tag lines from this class of warning. There were 1896 COMMIT_LOG_LONG_LINE warnings in v5.6..v5.8 before this patch application and 1879 afterwards. A quick manual check found all the dropped warnings related to signature tags. Link: https://lkml.kernel.org/r/20201116083754.10629-1-yashsri421@gmail.com Signed-off-by: Aditya Srivastava <yashsri421@gmail.com> Acked-by: Joe Perches <joe@perches.com> Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-15checkpatch: fix spelling errors and remove repeated wordDwaipayan Ray
Delete repeated word in scripts/checkpatch.pl: "are are" -> "are" Fix typos: "commments" -> "comments" "falsly" -> "falsely" Link: https://lkml.kernel.org/r/20201113152316.62975-1-dwaipayanray1@gmail.com Signed-off-by: Dwaipayan Ray <dwaipayanray1@gmail.com> Acked-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>