slab: simplify list initialization

The list initialization is simpler if we would do a memset instead of
explicitly mentioning each field. This is also going to simplify
the next patch that moves the alien cache array into the l3 structure.

Signed-off-by: Christoph Lameter <clameter@sgi.com>

Index: linux-2.6.18-rc3/mm/slab.c
===================================================================
--- linux-2.6.18-rc3.orig/mm/slab.c	2006-08-03 22:56:18.103218771 -0700
+++ linux-2.6.18-rc3/mm/slab.c	2006-08-03 22:58:30.853796134 -0700
@@ -353,15 +353,11 @@ static int slab_early_init = 1;
 
 static void kmem_list3_init(struct kmem_list3 *parent)
 {
+	memset(parent, 0, sizeof(struct kmem_list3));
 	INIT_LIST_HEAD(&parent->slabs_full);
 	INIT_LIST_HEAD(&parent->slabs_partial);
 	INIT_LIST_HEAD(&parent->slabs_free);
-	parent->shared = NULL;
-	parent->alien = NULL;
-	parent->colour_next = 0;
 	spin_lock_init(&parent->list_lock);
-	parent->free_objects = 0;
-	parent->free_touched = 0;
 }
 
 #define MAKE_LIST(cachep, listp, slab, nodeid)				\