Index: linux-2.6.21-rc4/include/linux/slab.h
===================================================================
--- linux-2.6.21-rc4.orig/include/linux/slab.h	2007-03-21 13:51:37.000000000 -0700
+++ linux-2.6.21-rc4/include/linux/slab.h	2007-03-21 13:51:44.000000000 -0700
@@ -73,7 +73,7 @@
 void *__kmalloc(size_t, gfp_t);
 void *__kzalloc(size_t, gfp_t);
 void kfree(const void *);
-unsigned int ksize(const void *);
+size_t ksize(const void *);
 
 /**
  * kcalloc - allocate memory for an array. The memory is set to zero.