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authorDmitry Vyukov <dvyukov@google.com>2017-06-22 16:14:17 +0200
committerIngo Molnar <mingo@kernel.org>2017-07-26 13:08:54 +0200
commitf06e8c584fa0d05312c11ea66194f3d2efb93c21 (patch)
tree6abbbbf95b2443bed4d23745b8b75ee4e39e334d /mm/kasan
parent25547b6b085d8e81e0f67ec6da98342c2b1548d2 (diff)
downloadlinux-f06e8c584fa0d05312c11ea66194f3d2efb93c21.tar.bz2
kasan: Allow kasan_check_read/write() to accept pointers to volatiles
Currently kasan_check_read/write() accept 'const void*', make them accept 'const volatile void*'. This is required for instrumentation of atomic operations and there is just no reason to not allow that. Signed-off-by: Dmitry Vyukov <dvyukov@google.com> Reviewed-by: Andrey Ryabinin <aryabinin@virtuozzo.com> Acked-by: Mark Rutland <mark.rutland@arm.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: kasan-dev@googlegroups.com Cc: linux-mm@kvack.org Cc: will.deacon@arm.com Link: http://lkml.kernel.org/r/33e5ec275c1ee89299245b2ebbccd63709c6021f.1498140838.git.dvyukov@google.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'mm/kasan')
-rw-r--r--mm/kasan/kasan.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/kasan/kasan.c b/mm/kasan/kasan.c
index ca11bc4ce205..6f319fb81718 100644
--- a/mm/kasan/kasan.c
+++ b/mm/kasan/kasan.c
@@ -267,13 +267,13 @@ static void check_memory_region(unsigned long addr,
check_memory_region_inline(addr, size, write, ret_ip);
}
-void kasan_check_read(const void *p, unsigned int size)
+void kasan_check_read(const volatile void *p, unsigned int size)
{
check_memory_region((unsigned long)p, size, false, _RET_IP_);
}
EXPORT_SYMBOL(kasan_check_read);
-void kasan_check_write(const void *p, unsigned int size)
+void kasan_check_write(const volatile void *p, unsigned int size)
{
check_memory_region((unsigned long)p, size, true, _RET_IP_);
}