[PATCH] fix memory leak in free_percpu

This fixes a memory leak where the percpu internal structure is not freed. 
Repeated add/remove device illustrates the leak nicely.
Signed-off-by: Philip R. Auld <pauld@egenera.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

mm/slab.c

@@ -2573,6 +2573,7 @@ free_percpu(const void *objp)
 			continue;
 		kfree(p->ptrs[i]);
 	}
+	kfree(p);
 }
 
 EXPORT_SYMBOL(free_percpu);