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UPSTREAM: kasan: inline kasan_reset_tag for tag-based modes

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[ Upstream commit c0054c565ae598073d6c27762c7d4f7de49a45d9 ]

Using kasan_reset_tag() currently results in a function call. As it's
called quite often from the allocator code, this leads to a noticeable
slowdown. Move it to include/linux/kasan.h and turn it into a static
inline function. Also remove the now unneeded reset_tag() internal KASAN
macro and use kasan_reset_tag() instead.

Link: https://lkml.kernel.org/r/6940383a3a9dfb416134d338d8fac97a9ebb8686.1606162397.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Marco Elver <elver@google.com>
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
Tested-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Branislav Rankov <Branislav.Rankov@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Kevin Brodsky <kevin.brodsky@arm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Bug: 172318110
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Change-Id: I714a464d99cbd6b5a9b25c041310e730ec7da5e2
This commit is contained in:
Andrey Konovalov
2020-12-22 12:02:52 -08:00
committed by Alistair Delva
parent 9655455b9e
commit 1e8a05e3c0
9 changed files with 18 additions and 29 deletions
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5
include/linux/kasan.h
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@@ -194,7 +194,10 @@ static inline void kasan_record_aux_stack(void *ptr) {}
#if defined(CONFIG_KASAN_SW_TAGS) || defined(CONFIG_KASAN_HW_TAGS)
void *kasan_reset_tag(const void *addr);
static inline void *kasan_reset_tag(const void *addr)
{
return (void *)arch_kasan_reset_tag(addr);
}
bool kasan_report(unsigned long addr, size_t size,
bool is_write, unsigned long ip);