diff options
| -rw-r--r-- | mm/slab.c | 22 | ||||
| -rw-r--r-- | mm/slab.h | 25 | ||||
| -rw-r--r-- | mm/slab_common.c | 7 | ||||
| -rw-r--r-- | mm/slub.c | 3 |
4 files changed, 32 insertions, 25 deletions
diff --git a/mm/slab.c b/mm/slab.c index 1f7fd5f51f8..6ebb9515a3e 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -162,23 +162,6 @@ */ static bool pfmemalloc_active __read_mostly; -/* Legal flag mask for kmem_cache_create(). */ -#if DEBUG -# define CREATE_MASK (SLAB_RED_ZONE | \ - SLAB_POISON | SLAB_HWCACHE_ALIGN | \ - SLAB_CACHE_DMA | \ - SLAB_STORE_USER | \ - SLAB_RECLAIM_ACCOUNT | SLAB_PANIC | \ - SLAB_DESTROY_BY_RCU | SLAB_MEM_SPREAD | \ - SLAB_DEBUG_OBJECTS | SLAB_NOLEAKTRACE | SLAB_NOTRACK) -#else -# define CREATE_MASK (SLAB_HWCACHE_ALIGN | \ - SLAB_CACHE_DMA | \ - SLAB_RECLAIM_ACCOUNT | SLAB_PANIC | \ - SLAB_DESTROY_BY_RCU | SLAB_MEM_SPREAD | \ - SLAB_DEBUG_OBJECTS | SLAB_NOLEAKTRACE | SLAB_NOTRACK) -#endif - /* * kmem_bufctl_t: * @@ -2378,11 +2361,6 @@ __kmem_cache_create (struct kmem_cache *cachep, unsigned long flags) if (flags & SLAB_DESTROY_BY_RCU) BUG_ON(flags & SLAB_POISON); #endif - /* - * Always checks flags, a caller might be expecting debug support which - * isn't available. - */ - BUG_ON(flags & ~CREATE_MASK); /* * Check that size is in terms of words. This is needed to avoid diff --git a/mm/slab.h b/mm/slab.h index 5a43c2f1362..66a62d3536c 100644 --- a/mm/slab.h +++ b/mm/slab.h @@ -45,6 +45,31 @@ static inline struct kmem_cache *__kmem_cache_alias(const char *name, size_t siz #endif +/* Legal flag mask for kmem_cache_create(), for various configurations */ +#define SLAB_CORE_FLAGS (SLAB_HWCACHE_ALIGN | SLAB_CACHE_DMA | SLAB_PANIC | \ + SLAB_DESTROY_BY_RCU | SLAB_DEBUG_OBJECTS ) + +#if defined(CONFIG_DEBUG_SLAB) +#define SLAB_DEBUG_FLAGS (SLAB_RED_ZONE | SLAB_POISON | SLAB_STORE_USER) +#elif defined(CONFIG_SLUB_DEBUG) +#define SLAB_DEBUG_FLAGS (SLAB_RED_ZONE | SLAB_POISON | SLAB_STORE_USER | \ + SLAB_TRACE | SLAB_DEBUG_FREE) +#else +#define SLAB_DEBUG_FLAGS (0) +#endif + +#if defined(CONFIG_SLAB) +#define SLAB_CACHE_FLAGS (SLAB_MEM_SPREAD | SLAB_NOLEAKTRACE | \ + SLAB_RECLAIM_ACCOUNT | SLAB_TEMPORARY | SLAB_NOTRACK) +#elif defined(CONFIG_SLUB) +#define SLAB_CACHE_FLAGS (SLAB_NOLEAKTRACE | SLAB_RECLAIM_ACCOUNT | \ + SLAB_TEMPORARY | SLAB_NOTRACK) +#else +#define SLAB_CACHE_FLAGS (0) +#endif + +#define CACHE_CREATE_MASK (SLAB_CORE_FLAGS | SLAB_DEBUG_FLAGS | SLAB_CACHE_FLAGS) + int __kmem_cache_shutdown(struct kmem_cache *); struct seq_file; diff --git a/mm/slab_common.c b/mm/slab_common.c index 5fb753da6cf..b705be7faa4 100644 --- a/mm/slab_common.c +++ b/mm/slab_common.c @@ -109,6 +109,13 @@ struct kmem_cache *kmem_cache_create(const char *name, size_t size, size_t align if (!kmem_cache_sanity_check(name, size) == 0) goto out_locked; + /* + * Some allocators will constraint the set of valid flags to a subset + * of all flags. We expect them to define CACHE_CREATE_MASK in this + * case, and we'll just provide them with a sanitized version of the + * passed flags. + */ + flags &= CACHE_CREATE_MASK; s = __kmem_cache_alias(name, size, align, flags, ctor); if (s) diff --git a/mm/slub.c b/mm/slub.c index deee7c754a7..b2ada3db422 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -112,9 +112,6 @@ * the fast path and disables lockless freelists. */ -#define SLAB_DEBUG_FLAGS (SLAB_RED_ZONE | SLAB_POISON | SLAB_STORE_USER | \ - SLAB_TRACE | SLAB_DEBUG_FREE) - static inline int kmem_cache_debug(struct kmem_cache *s) { #ifdef CONFIG_SLUB_DEBUG |