diff --git a/mm/slab.h b/mm/slab.h
index 7deeb44..dc78101 100644
--- a/mm/slab.h
+++ b/mm/slab.h
@@ -47,4 +47,12 @@
 
 int __kmem_cache_shutdown(struct kmem_cache *);
 
+struct seq_file;
+struct file;
+void print_slabinfo_header(struct seq_file *m);
+
+int slabinfo_show(struct seq_file *m, void *p);
+
+ssize_t slabinfo_write(struct file *file, const char __user *buffer,
+		       size_t count, loff_t *ppos);
 #endif