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authorFeng Tang <feng.tang@intel.com>2023-01-04 09:06:05 +0300
committerAndrew Morton <akpm@linux-foundation.org>2023-01-19 04:12:55 +0300
commitbbc61844b4645d54c147a82654ac974bb7be85de (patch)
treed7f98b763b9cd72ed604086054f66cad66eb4153 /include
parentbb94429096d090f5e209624d08919a7962d6c4b7 (diff)
downloadlinux-bbc61844b4645d54c147a82654ac974bb7be85de.tar.xz
mm/kasan: simplify and refine kasan_cache code
struct 'kasan_cache' has a member 'is_kmalloc' indicating whether its host kmem_cache is a kmalloc cache. With newly introduced is_kmalloc_cache() helper, 'is_kmalloc' and its related function can be replaced and removed. Also 'kasan_cache' is only needed by KASAN generic mode, and not by SW/HW tag modes, so refine its protection macro accordingly, suggested by Andrey Konoval. Link: https://lkml.kernel.org/r/20230104060605.930910-2-feng.tang@intel.com Signed-off-by: Feng Tang <feng.tang@intel.com> Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Acked-by: David Rientjes <rientjes@google.com> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Cc: Christoph Lameter <cl@linux.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: Roman Gushchin <roman.gushchin@linux.dev> Cc: Vincenzo Frascino <vincenzo.frascino@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/kasan.h22
-rw-r--r--include/linux/slab_def.h2
-rw-r--r--include/linux/slub_def.h2
3 files changed, 7 insertions, 19 deletions
diff --git a/include/linux/kasan.h b/include/linux/kasan.h
index 5ebbaf672009..f7ef70661ce2 100644
--- a/include/linux/kasan.h
+++ b/include/linux/kasan.h
@@ -96,15 +96,6 @@ static inline bool kasan_has_integrated_init(void)
}
#ifdef CONFIG_KASAN
-
-struct kasan_cache {
-#ifdef CONFIG_KASAN_GENERIC
- int alloc_meta_offset;
- int free_meta_offset;
-#endif
- bool is_kmalloc;
-};
-
void __kasan_unpoison_range(const void *addr, size_t size);
static __always_inline void kasan_unpoison_range(const void *addr, size_t size)
{
@@ -129,13 +120,6 @@ static __always_inline bool kasan_unpoison_pages(struct page *page,
return false;
}
-void __kasan_cache_create_kmalloc(struct kmem_cache *cache);
-static __always_inline void kasan_cache_create_kmalloc(struct kmem_cache *cache)
-{
- if (kasan_enabled())
- __kasan_cache_create_kmalloc(cache);
-}
-
void __kasan_poison_slab(struct slab *slab);
static __always_inline void kasan_poison_slab(struct slab *slab)
{
@@ -255,7 +239,6 @@ static inline bool kasan_unpoison_pages(struct page *page, unsigned int order,
{
return false;
}
-static inline void kasan_cache_create_kmalloc(struct kmem_cache *cache) {}
static inline void kasan_poison_slab(struct slab *slab) {}
static inline void kasan_unpoison_object_data(struct kmem_cache *cache,
void *object) {}
@@ -306,6 +289,11 @@ static inline void kasan_unpoison_task_stack(struct task_struct *task) {}
#ifdef CONFIG_KASAN_GENERIC
+struct kasan_cache {
+ int alloc_meta_offset;
+ int free_meta_offset;
+};
+
size_t kasan_metadata_size(struct kmem_cache *cache, bool in_object);
slab_flags_t kasan_never_merge(void);
void kasan_cache_create(struct kmem_cache *cache, unsigned int *size,
diff --git a/include/linux/slab_def.h b/include/linux/slab_def.h
index 5834bad8ad78..a61e7d55d0d3 100644
--- a/include/linux/slab_def.h
+++ b/include/linux/slab_def.h
@@ -72,7 +72,7 @@ struct kmem_cache {
int obj_offset;
#endif /* CONFIG_DEBUG_SLAB */
-#ifdef CONFIG_KASAN
+#ifdef CONFIG_KASAN_GENERIC
struct kasan_cache kasan_info;
#endif
diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h
index aa0ee1678d29..f6df03f934e5 100644
--- a/include/linux/slub_def.h
+++ b/include/linux/slub_def.h
@@ -136,7 +136,7 @@ struct kmem_cache {
unsigned int *random_seq;
#endif
-#ifdef CONFIG_KASAN
+#ifdef CONFIG_KASAN_GENERIC
struct kasan_cache kasan_info;
#endif