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UPSTREAM: kasan, arm64: use ARCH_SLAB_MINALIGN instead of manual aligning

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(Upstream commit eb214f2dda).

Instead of changing cache->align to be aligned to KASAN_SHADOW_SCALE_SIZE
in kasan_cache_create() we can reuse the ARCH_SLAB_MINALIGN macro.

Link: http://lkml.kernel.org/r/52ddd881916bcc153a9924c154daacde78522227.1546540962.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Suggested-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.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>
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Bug: 128674696
Change-Id: Ia1c8de45c621b68555f77a569431e232ff4dc781
This commit is contained in:
Andrey Konovalov
2019-01-08 15:23:11 -08:00
committed by Alistair Delva
parent 88299f649b
commit c84291fd95
2 changed files with 6 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
arch/arm64/include/asm/cache.h
View File

@@ -49,6 +49,12 @@
*/
#define ARCH_DMA_MINALIGN (128)
#ifdef CONFIG_KASAN_SW_TAGS
#define ARCH_SLAB_MINALIGN (1ULL << KASAN_SHADOW_SCALE_SHIFT)
#else
#define ARCH_SLAB_MINALIGN __alignof__(unsigned long long)
#endif
#ifndef __ASSEMBLY__
#include <linux/bitops.h>

2
mm/kasan/common.c
View File

@@ -298,8 +298,6 @@ void kasan_cache_create(struct kmem_cache *cache, unsigned int *size,
return;
}
cache->align = round_up(cache->align, KASAN_SHADOW_SCALE_SIZE);
*flags |= SLAB_KASAN;
}