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| author | Andrey Konovalov <andreyknvl@google.com> | 2022-09-06 00:05:30 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-10-04 00:02:58 +0300 |
| commit | 3b7f8813e9ecf7fe91f2f8dc3b581a111cd374a5 (patch) | |
| tree | 5cebe42b30879ee83ee7a7f8ef8cda292ff064ef /mm/kasan/common.c | |
| parent | f372bde922e2ced8e0b5a928887b4cf587cc4453 (diff) | |
| download | linux-3b7f8813e9ecf7fe91f2f8dc3b581a111cd374a5.tar.xz | |
kasan: only define kasan_never_merge for Generic mode
KASAN prevents merging of slab caches whose objects have per-object
metadata stored in redzones.
As now only the Generic mode uses per-object metadata, define
kasan_never_merge() only for this mode.
Link: https://lkml.kernel.org/r/81ed01f29ff3443580b7e2fe362a8b47b1e8006d.1662411799.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Marco Elver <elver@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Peter Collingbourne <pcc@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/kasan/common.c')
| -rw-r--r-- | mm/kasan/common.c | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/mm/kasan/common.c b/mm/kasan/common.c index 7c79c560315d..c2690e938030 100644 --- a/mm/kasan/common.c +++ b/mm/kasan/common.c @@ -88,14 +88,6 @@ asmlinkage void kasan_unpoison_task_stack_below(const void *watermark) } #endif /* CONFIG_KASAN_STACK */ -/* Only allow cache merging when no per-object metadata is present. */ -slab_flags_t __kasan_never_merge(void) -{ - if (kasan_requires_meta()) - return SLAB_KASAN; - return 0; -} - void __kasan_unpoison_pages(struct page *page, unsigned int order, bool init) { u8 tag; |