Use size_t in krealloc

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

Index: linux-2.6.21-mm1/mm/slub.c
===================================================================
--- linux-2.6.21-mm1.orig/mm/slub.c	2007-05-07 19:39:47.000000000 -0700
+++ linux-2.6.21-mm1/mm/slub.c	2007-05-07 19:40:06.000000000 -0700
@@ -2391,7 +2391,7 @@ EXPORT_SYMBOL(kmem_cache_shrink);
 void *krealloc(const void *p, size_t new_size, gfp_t flags)
 {
 	void *ret;
-	unsigned long ks;
+	size_t ks;
 
 	if (unlikely(!p))
 		return kmalloc(new_size, flags);