Index: kernel/generic/include/mm/slab.h
===================================================================
--- kernel/generic/include/mm/slab.h	(revision b1c57a828cb73794beb6a309f5ec0199ca75ecc2)
+++ kernel/generic/include/mm/slab.h	(revision 1f2b07ab9fedfc54da0cdadeebaa5fb7abc38ca3)
@@ -142,5 +142,6 @@
 extern void *malloc(size_t, unsigned int)
     __attribute__((malloc));
-extern void *realloc(void *, size_t, unsigned int);
+extern void *realloc(void *, size_t, unsigned int)
+    __attribute__((warn_unused_result));
 extern void free(void *);