diff --git a/fs/autofs4/inode.c b/fs/autofs4/inode.c
index a525607..4bb14cc 100644
--- a/fs/autofs4/inode.c
+++ b/fs/autofs4/inode.c
@@ -206,6 +206,7 @@
 	sbi->version = 0;
 	sbi->sub_version = 0;
 	init_MUTEX(&sbi->wq_sem);
+	spin_lock_init(&sbi->fs_lock);
 	sbi->queues = NULL;
 	s->s_blocksize = 1024;
 	s->s_blocksize_bits = 10;