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/b16c90197bb2c06c780e6e981c40345e03fda465.1546450432.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: Will Deacon <will.deacon@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/arm64/include/asm/kasan.h | 4 ++++
include/linux/slab.h | 1 +
mm/kasan/common.c | 2 --
3 files changed, 5 insertions(+), 2 deletions(-)
--- a/arch/arm64/include/asm/kasan.h~kasan-arm64-use-arch_slab_minalign-instead-of-manual-aligning
+++ a/arch/arm64/include/asm/kasan.h
@@ -36,6 +36,10 @@
#define KASAN_SHADOW_OFFSET (KASAN_SHADOW_END - (1ULL << \
(64 - KASAN_SHADOW_SCALE_SHIFT)))
+#ifdef CONFIG_KASAN_SW_TAGS
+#define ARCH_SLAB_MINALIGN (1ULL << KASAN_SHADOW_SCALE_SHIFT)
+#endif
+
void kasan_init(void);
void kasan_copy_shadow(pgd_t *pgdir);
asmlinkage void kasan_early_init(void);
--- a/include/linux/slab.h~kasan-arm64-use-arch_slab_minalign-instead-of-manual-aligning
+++ a/include/linux/slab.h
@@ -16,6 +16,7 @@
#include <linux/overflow.h>
#include <linux/types.h>
#include <linux/workqueue.h>
+#include <linux/kasan.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
