diff --git a/fs/xfs/xfs_iget.c b/fs/xfs/xfs_iget.c
index 80e5264..cc72c56 100644
--- a/fs/xfs/xfs_iget.c
+++ b/fs/xfs/xfs_iget.c
@@ -73,6 +73,9 @@
 	ASSERT(atomic_read(&ip->i_pincount) == 0);
 	ASSERT(!spin_is_locked(&ip->i_flags_lock));
 	ASSERT(completion_done(&ip->i_flush));
+	ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock));
+
+	mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino);
 
 	/* initialise the xfs inode */
 	ip->i_ino = ino;