mm/sl[aou]b: Common alignment code

[linux-2.6-block.git] / mm / slab.h

diff --git a/mm/slab.h b/mm/slab.h
index db7848caaa25a67b01a1d5318c48b92972722f5c..1cb9c9ee0e6f3875854b6f51b206925031faaf55 100644 (file)
--- a/mm/slab.h
+++ b/mm/slab.h
@@ -25,9 +25,79 @@ extern enum slab_state slab_state;
 
 /* The slab cache mutex protects the management structures during changes */
 extern struct mutex slab_mutex;
+
+/* The list of all slab caches on the system */
 extern struct list_head slab_caches;
 
-struct kmem_cache *__kmem_cache_create(const char *name, size_t size,
+/* The slab cache that manages slab cache information */
+extern struct kmem_cache *kmem_cache;
+
+unsigned long calculate_alignment(unsigned long flags,
+               unsigned long align, unsigned long size);
+
+/* Functions provided by the slab allocators */
+extern int __kmem_cache_create(struct kmem_cache *, unsigned long flags);
+
+extern struct kmem_cache *create_kmalloc_cache(const char *name, size_t size,
+                       unsigned long flags);
+extern void create_boot_cache(struct kmem_cache *, const char *name,
+                       size_t size, unsigned long flags);
+
+#ifdef CONFIG_SLUB
+struct kmem_cache *__kmem_cache_alias(const char *name, size_t size,
        size_t align, unsigned long flags, void (*ctor)(void *));
+#else
+static inline struct kmem_cache *__kmem_cache_alias(const char *name, size_t size,
+       size_t align, unsigned long flags, void (*ctor)(void *))
+{ return NULL; }
+#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;
+struct file;
+
+struct slabinfo {
+       unsigned long active_objs;
+       unsigned long num_objs;
+       unsigned long active_slabs;
+       unsigned long num_slabs;
+       unsigned long shared_avail;
+       unsigned int limit;
+       unsigned int batchcount;
+       unsigned int shared;
+       unsigned int objects_per_slab;
+       unsigned int cache_order;
+};
 
+void get_slabinfo(struct kmem_cache *s, struct slabinfo *sinfo);
+void slabinfo_show_stats(struct seq_file *m, struct kmem_cache *s);
+ssize_t slabinfo_write(struct file *file, const char __user *buffer,
+                      size_t count, loff_t *ppos);
 #endif