SLUB: Use BUILD_BUG_ON to flag too big slab caches

Do not generate a link failure instead abort compilation
using BUILD_BUG_ON

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

Index: linux-2.6.21-rc7-mm1/include/linux/slub_def.h
===================================================================
--- linux-2.6.21-rc7-mm1.orig/include/linux/slub_def.h	2007-04-25 11:38:00.000000000 -0700
+++ linux-2.6.21-rc7-mm1/include/linux/slub_def.h	2007-04-25 11:38:14.000000000 -0700
@@ -140,17 +140,11 @@ static inline struct kmem_cache *kmalloc
 {
 	int index = kmalloc_index(size);
 
+	BUILD_BUG_ON(index < 0);
+
 	if (index == 0)
 		return NULL;
 
-	if (index < 0) {
-		/*
-		 * Generate a link failure. Would be great if we could
-		 * do something to stop the compile here.
-		 */
-		extern void __kmalloc_size_too_large(void);
-		__kmalloc_size_too_large();
-	}
 	return &kmalloc_caches[index];
 }