From: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Move the implementations of kasan_get_alloc/free_meta() to generic.c,
as the common KASAN code does not use these functions anymore.
Also drop kasan_reset_tag() from the implementation, as the Generic
mode does not tag pointers.
Reviewed-by: Marco Elver <elver@xxxxxxxxxx>
Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
---
mm/kasan/common.c | 19 -------------------
mm/kasan/generic.c | 17 +++++++++++++++++
mm/kasan/kasan.h | 14 +++++++-------
3 files changed, 24 insertions(+), 26 deletions(-)
diff --git a/mm/kasan/common.c b/mm/kasan/common.c
index 18107675a7fe..19ddc0ed0e7b 100644
--- a/mm/kasan/common.c
+++ b/mm/kasan/common.c
@@ -229,25 +229,6 @@ size_t __kasan_metadata_size(struct kmem_cache *cache)
sizeof(struct kasan_free_meta) : 0);
}
-struct kasan_alloc_meta *kasan_get_alloc_meta(struct kmem_cache *cache,
- const void *object)
-{
- if (!cache->kasan_info.alloc_meta_offset)
- return NULL;
- return kasan_reset_tag(object) + cache->kasan_info.alloc_meta_offset;
-}
-
-#ifdef CONFIG_KASAN_GENERIC
-struct kasan_free_meta *kasan_get_free_meta(struct kmem_cache *cache,
- const void *object)
-{
- BUILD_BUG_ON(sizeof(struct kasan_free_meta) > 32);
- if (cache->kasan_info.free_meta_offset == KASAN_NO_FREE_META)
- return NULL;
- return kasan_reset_tag(object) + cache->kasan_info.free_meta_offset;
-}
-#endif
-
void __kasan_poison_slab(struct slab *slab)
{
struct page *page = slab_page(slab);
diff --git a/mm/kasan/generic.c b/mm/kasan/generic.c
index 5462ddbc21e6..fa654cb96a0d 100644
--- a/mm/kasan/generic.c
+++ b/mm/kasan/generic.c
@@ -328,6 +328,23 @@ DEFINE_ASAN_SET_SHADOW(f3);
DEFINE_ASAN_SET_SHADOW(f5);
DEFINE_ASAN_SET_SHADOW(f8);
+struct kasan_alloc_meta *kasan_get_alloc_meta(struct kmem_cache *cache,
+ const void *object)
+{
+ if (!cache->kasan_info.alloc_meta_offset)
+ return NULL;
+ return (void *)object + cache->kasan_info.alloc_meta_offset;
+}
+
+struct kasan_free_meta *kasan_get_free_meta(struct kmem_cache *cache,
+ const void *object)
+{
+ BUILD_BUG_ON(sizeof(struct kasan_free_meta) > 32);
+ if (cache->kasan_info.free_meta_offset == KASAN_NO_FREE_META)
+ return NULL;
+ return (void *)object + cache->kasan_info.free_meta_offset;
+}
+
void kasan_init_object_meta(struct kmem_cache *cache, const void *object)
{
struct kasan_alloc_meta *alloc_meta;
diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h
index 2c8c3cce7bc6..fdd577f3eb9d 100644
--- a/mm/kasan/kasan.h
+++ b/mm/kasan/kasan.h
@@ -209,13 +209,6 @@ struct kunit_kasan_status {
};
#endif
-struct kasan_alloc_meta *kasan_get_alloc_meta(struct kmem_cache *cache,
- const void *object);
-#ifdef CONFIG_KASAN_GENERIC
-struct kasan_free_meta *kasan_get_free_meta(struct kmem_cache *cache,
- const void *object);
-#endif
-
#if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)
static inline const void *kasan_shadow_to_mem(const void *shadow_addr)
@@ -281,6 +274,13 @@ struct slab *kasan_addr_to_slab(const void *addr);
void kasan_init_object_meta(struct kmem_cache *cache, const void *object);
+#ifdef CONFIG_KASAN_GENERIC
+struct kasan_alloc_meta *kasan_get_alloc_meta(struct kmem_cache *cache,
+ const void *object);
+struct kasan_free_meta *kasan_get_free_meta(struct kmem_cache *cache,
+ const void *object);
+#endif
+
depot_stack_handle_t kasan_save_stack(gfp_t flags, bool can_alloc);
void kasan_set_track(struct kasan_track *track, gfp_t flags);
void kasan_save_alloc_info(struct kmem_cache *cache, void *object, gfp_t flags);
--
2.25.1
