diff options
| author | Dmitry Vyukov <dvyukov@google.com> | 2018-01-29 18:26:07 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2018-03-12 12:15:35 +0100 |
| commit | ac605bee0bfab40fd5d11964705e907d2d5a32de (patch) | |
| tree | 0f16f12d231f572f275e44ed30362bceacca2f7e /arch/x86/include/asm/atomic.h | |
| parent | locking/atomic, asm-generic: Add KASAN instrumentation to atomic operations (diff) | |
| download | linux-ac605bee0bfab40fd5d11964705e907d2d5a32de.tar.xz linux-ac605bee0bfab40fd5d11964705e907d2d5a32de.zip | |
locking/atomic, asm-generic, x86: Add comments for atomic instrumentation
The comments are factored out from the code changes to make them
easier to read. Add them separately to explain some non-obvious
aspects.
Signed-off-by: Dmitry Vyukov <dvyukov@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will.deacon@arm.com>
Cc: kasan-dev@googlegroups.com
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/cc595efc644bb905407012d82d3eb8bac3368e7a.1517246437.git.dvyukov@google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/include/asm/atomic.h')
| -rw-r--r-- | arch/x86/include/asm/atomic.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/include/asm/atomic.h b/arch/x86/include/asm/atomic.h index 33afc966d6a9..0db6bec95489 100644 --- a/arch/x86/include/asm/atomic.h +++ b/arch/x86/include/asm/atomic.h @@ -24,6 +24,10 @@ */ static __always_inline int arch_atomic_read(const atomic_t *v) { + /* + * Note for KASAN: we deliberately don't use READ_ONCE_NOCHECK() here, + * it's non-inlined function that increases binary size and stack usage. + */ return READ_ONCE((v)->counter); } |