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authorAndrey Konovalov <andreyknvl@google.com>2019-01-08 15:23:11 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2019-01-08 17:15:11 -0800
commiteb214f2dda31ffa989033b1e0f848ba0d3cb6188 (patch)
treea632bdd4955ee09bf0a6d185082a9b1e44be3c10
parent63f3655f950186752236bb88a22f8252c11ce394 (diff)
downloadlinux-eb214f2dda31ffa989033b1e0f848ba0d3cb6188.tar.bz2
kasan, arm64: use ARCH_SLAB_MINALIGN instead of manual aligning
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>
-rw-r--r--arch/arm64/include/asm/cache.h6
-rw-r--r--mm/kasan/common.c2
2 files changed, 6 insertions, 2 deletions
diff --git a/arch/arm64/include/asm/cache.h b/arch/arm64/include/asm/cache.h
index 13dd42c3ad4e..eb43e09c1980 100644
--- a/arch/arm64/include/asm/cache.h
+++ b/arch/arm64/include/asm/cache.h
@@ -58,6 +58,12 @@
*/
#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>
diff --git a/mm/kasan/common.c b/mm/kasan/common.c
index 03d5d1374ca7..44390392d4c9 100644
--- a/mm/kasan/common.c
+++ b/mm/kasan/common.c
@@ -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;
}