[PATCH] slab: use parameter passed to cache_reap to determine pointer to work structure

Use the pointer passed to cache_reap to determine the work pointer and
consolidate exit paths.
Signed-off-by: NChristoph Lameter <clameter@sgi.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

mm/slab.c

@@ -4029,18 +4029,17 @@ void drain_array(struct kmem_cache *cachep, struct kmem_list3 *l3,
  * If we cannot acquire the cache chain mutex then just give up - we'll try
  * again on the next iteration.
  */
-static void cache_reap(struct work_struct *unused)
+static void cache_reap(struct work_struct *w)
 {
 	struct kmem_cache *searchp;
 	struct kmem_list3 *l3;
 	int node = numa_node_id();
+	struct delayed_work *work =
+		container_of(w, struct delayed_work, work);
 
-	if (!mutex_trylock(&cache_chain_mutex)) {
+	if (!mutex_trylock(&cache_chain_mutex))
 		/* Give up. Setup the next iteration. */
-		schedule_delayed_work(&__get_cpu_var(reap_work),
-				      round_jiffies_relative(REAPTIMEOUT_CPUC));
-		return;
-	}
+		goto out;
 
 	list_for_each_entry(searchp, &cache_chain, next) {
 		check_irq_on();
@@ -4083,9 +4082,9 @@ static void cache_reap(struct work_struct *unused)
 	mutex_unlock(&cache_chain_mutex);
 	next_reap_node();
 	refresh_cpu_vm_stats(smp_processor_id());
+out:
 	/* Set up the next iteration */
-	schedule_delayed_work(&__get_cpu_var(reap_work),
-		round_jiffies_relative(REAPTIMEOUT_CPUC));
+	schedule_delayed_work(work, round_jiffies_relative(REAPTIMEOUT_CPUC));
 }
 
 #ifdef CONFIG_PROC_FS