[PATCH 11/12] kasan: always inline HW_TAGS helper functions
From: Andrey Konovalov <hidden>
Date: 2021-02-01 19:48:14
Also in:
linux-arm-kernel, lkml
Subsystem:
kasan, memory management, the rest · Maintainers:
Andrey Ryabinin, Andrew Morton, Linus Torvalds
Mark all static functions in common.c and kasan.h that are used for hardware tag-based KASAN as __always_inline to avoid unnecessary function calls. Signed-off-by: Andrey Konovalov <redacted> --- mm/kasan/common.c | 13 +++++++------ mm/kasan/kasan.h | 6 +++--- 2 files changed, 10 insertions(+), 9 deletions(-)
diff --git a/mm/kasan/common.c b/mm/kasan/common.c
index 5691cca69397..2004ecd6e43c 100644
--- a/mm/kasan/common.c
+++ b/mm/kasan/common.c@@ -279,7 +279,8 @@ void __kasan_poison_object_data(struct kmem_cache *cache, void *object) * based on objects indexes, so that objects that are next to each other * get different tags. */ -static u8 assign_tag(struct kmem_cache *cache, const void *object, bool init) +static __always_inline u8 assign_tag(struct kmem_cache *cache, + const void *object, bool init) { if (IS_ENABLED(CONFIG_KASAN_GENERIC)) return 0xff;
@@ -321,8 +322,8 @@ void * __must_check __kasan_init_slab_obj(struct kmem_cache *cache, return (void *)object; } -static bool ____kasan_slab_free(struct kmem_cache *cache, void *object, - unsigned long ip, bool quarantine) +static __always_inline bool ____kasan_slab_free(struct kmem_cache *cache, + void *object, unsigned long ip, bool quarantine) { u8 tag; void *tagged_object;
@@ -366,7 +367,7 @@ bool __kasan_slab_free(struct kmem_cache *cache, void *object, unsigned long ip) return ____kasan_slab_free(cache, object, ip, true); } -static bool ____kasan_kfree_large(void *ptr, unsigned long ip) +static __always_inline bool ____kasan_kfree_large(void *ptr, unsigned long ip) { if (ptr != page_address(virt_to_head_page(ptr))) { kasan_report_invalid_free(ptr, ip);
@@ -461,8 +462,8 @@ void * __must_check __kasan_slab_alloc(struct kmem_cache *cache, return tagged_object; } -static void *____kasan_kmalloc(struct kmem_cache *cache, const void *object, - size_t size, gfp_t flags) +static __always_inline void *____kasan_kmalloc(struct kmem_cache *cache, + const void *object, size_t size, gfp_t flags) { unsigned long redzone_start; unsigned long redzone_end;
diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h
index 2f7400a3412f..d5fe72747a53 100644
--- a/mm/kasan/kasan.h
+++ b/mm/kasan/kasan.h@@ -321,7 +321,7 @@ static inline u8 kasan_random_tag(void) { return 0; } #ifdef CONFIG_KASAN_HW_TAGS -static inline void kasan_poison(const void *addr, size_t size, u8 value) +static __always_inline void kasan_poison(const void *addr, size_t size, u8 value) { addr = kasan_reset_tag(addr);
@@ -337,7 +337,7 @@ static inline void kasan_poison(const void *addr, size_t size, u8 value) hw_set_mem_tag_range((void *)addr, size, value); } -static inline void kasan_unpoison(const void *addr, size_t size) +static __always_inline void kasan_unpoison(const void *addr, size_t size) { u8 tag = get_tag(addr);
@@ -354,7 +354,7 @@ static inline void kasan_unpoison(const void *addr, size_t size) hw_set_mem_tag_range((void *)addr, size, tag); } -static inline bool kasan_byte_accessible(const void *addr) +static __always_inline bool kasan_byte_accessible(const void *addr) { u8 ptr_tag = get_tag(addr); u8 mem_tag = hw_get_mem_tag((void *)addr);
--
2.30.0.365.g02bc693789-goog