Kmem cache zalloc

http://lxr.free-electrons.com/source/include/linux/slab.h#L628

625 /*
626  * Shortcuts
627  */
628 static inline void *kmem_cache_zalloc(struct kmem_cache *k, gfp_t flags)
629 {
630         return kmem_cache_alloc(k, flags | __GFP_ZERO);  //GFP_ZERO is return zeroed page on success
631 }
 
3456 /**
3457  * kmem_cache_alloc - Allocate an object
3458  * @cachep: The cache to allocate from.
3459  * @flags: See kmalloc().
3460  *
3461  * Allocate an object from this cache.  The flags are only relevant
3462  * if the cache has no available objects.
3463  */
3464 void *kmem_cache_alloc(struct kmem_cache *cachep, gfp_t flags)
3465 {
3466         void *ret = slab_alloc(cachep, flags, _RET_IP_);
3467 
3468         trace_kmem_cache_alloc(_RET_IP_, ret,
3469                                cachep->object_size, cachep->size, flags);
3470 
3471         return ret;
3472 }
3473 EXPORT_SYMBOL(kmem_cache_alloc);