slub: Acquire_slab() avoid loop

}

/*

 * Lock slab, remove from the partial list and put the object into the

 * per cpu freelist.

 * Remove slab from the partial list, freeze it and

 * return the pointer to the freelist.

 *

 * Returns a list of objects or NULL if it fails.

 *

 * Must hold list_lock.

 * Must hold list_lock since we modify the partial list.

 */

static inline void *acquire_slab(struct kmem_cache *s,

		struct kmem_cache_node *n, struct page *page,

	 * The old freelist is the list of objects for the

	 * per cpu allocation list.

	 */

	do {

	freelist = page->freelist;

	counters = page->counters;

	new.counters = counters;

	VM_BUG_ON(new.frozen);

	new.frozen = 1;

	} while (!__cmpxchg_double_slab(s, page,

	if (!__cmpxchg_double_slab(s, page,

			freelist, counters,

			NULL, new.counters,

			"lock and freeze"));

			"acquire_slab"))

		return NULL;

	remove_partial(n, page);

	WARN_ON(!freelist);

	return freelist;

}