diff --git a/mm/tiny-shmem.c b/mm/tiny-shmem.c
index c13a216..b58abcf 100644
--- a/mm/tiny-shmem.c
+++ b/mm/tiny-shmem.c
@@ -31,11 +31,14 @@
 
 static int __init init_tmpfs(void)
 {
-	register_filesystem(&tmpfs_fs_type);
+	BUG_ON(register_filesystem(&tmpfs_fs_type) != 0);
+
 #ifdef CONFIG_TMPFS
 	devfs_mk_dir("shm");
 #endif
 	shm_mnt = kern_mount(&tmpfs_fs_type);
+	BUG_ON(IS_ERR(shm_mnt));
+
 	return 0;
 }
 module_init(init_tmpfs)