The patch titled
Subject: kasan, arm64: use ARCH_SLAB_MINALIGN instead of manual aligning
has been added to the -mm tree. Its filename is
kasan-arm64-use-arch_slab_minalign-instead-of-manual-aligning.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/kasan-arm64-use-arch_slab_minalign-instead-of-manual-aligning.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/kasan-arm64-use-arch_slab_minalign-instead-of-manual-aligning.patch
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------------------------------------------------------
From: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Subject: 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@xxxxxxxxxx
Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Suggested-by: Vincenzo Frascino <vincenzo.frascino@xxxxxxx>
Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Vincenzo Frascino <vincenzo.frascino@xxxxxxx>
Cc: Will Deacon <will.deacon@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/arm64/include/asm/cache.h | 6 ++++++
mm/kasan/common.c | 2 --
2 files changed, 6 insertions(+), 2 deletions(-)
--- a/arch/arm64/include/asm/cache.h~kasan-arm64-use-arch_slab_minalign-instead-of-manual-aligning
+++ a/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>
--- a/mm/kasan/common.c~kasan-arm64-use-arch_slab_minalign-instead-of-manual-aligning
+++ a/mm/kasan/common.c
@@ -298,8 +298,6 @@ void kasan_cache_create(struct kmem_cach
return;
}
- cache->align = round_up(cache->align, KASAN_SHADOW_SCALE_SIZE);
-
*flags |= SLAB_KASAN;
}
_
Patches currently in -mm which might be from andreyknvl@xxxxxxxxxx are
kasan-arm64-use-arch_slab_minalign-instead-of-manual-aligning.patch
kasan-make-tag-based-mode-work-with-config_hardened_usercopy.patch
kasan-fix-krealloc-handling-for-tag-based-mode.patch
