2 * Slab allocator functions that are independent of the allocator strategy
6 #include <linux/slab.h>
9 #include <linux/poison.h>
10 #include <linux/interrupt.h>
11 #include <linux/memory.h>
12 #include <linux/compiler.h>
13 #include <linux/module.h>
15 #include <asm/cacheflush.h>
16 #include <asm/tlbflush.h>
20 * kmem_cache_create - Create a cache.
21 * @name: A string which is used in /proc/slabinfo to identify this cache.
22 * @size: The size of objects to be created in this cache.
23 * @align: The required alignment for the objects.
25 * @ctor: A constructor for the objects.
27 * Returns a ptr to the cache on success, NULL on failure.
28 * Cannot be called within a interrupt, but can be interrupted.
29 * The @ctor is run when new pages are allocated by the cache.
33 * %SLAB_POISON - Poison the slab with a known test pattern (a5a5a5a5)
34 * to catch references to uninitialised memory.
36 * %SLAB_RED_ZONE - Insert `Red' zones around the allocated memory to check
37 * for buffer overruns.
39 * %SLAB_HWCACHE_ALIGN - Align the objects in this cache to a hardware
40 * cacheline. This can be beneficial if you're counting cycles as closely
44 struct kmem_cache *kmem_cache_create(const char *name, size_t size, size_t align,
45 unsigned long flags, void (*ctor)(void *))
47 struct kmem_cache *s = NULL;
49 #ifdef CONFIG_DEBUG_VM
50 if (!name || in_interrupt() || size < sizeof(void *) ||
51 size > KMALLOC_MAX_SIZE) {
52 printk(KERN_ERR "kmem_cache_create(%s) integrity check"
58 s = __kmem_cache_create(name, size, align, flags, ctor);
60 #ifdef CONFIG_DEBUG_VM
63 if (!s && (flags & SLAB_PANIC))
64 panic("kmem_cache_create: Failed to create slab '%s'\n", name);
68 EXPORT_SYMBOL(kmem_cache_create);