Commit 62dbd717 authored Apr 17, 2013 by Josef Bacik

Btrfs: fix lockdep warning



The locking order for stuff is

__sb_start_write
ordered_mutex

but with sync() we don't do __sb_start_write for some strange reason, which
means that our iput in wait_ordered_extents could start a transaction which does
the __sb_start_write while we're holding the ordered_mutex.  Fix this by using
delayed iput in sync.  Thanks,

Reported-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>

parent 534e6623

fs/btrfs/super.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -866,7 +866,7 @@ int btrfs_sync_fs(struct super_block *sb, int wait)
		return 0;
		}

		btrfs_wait_ordered_extents(root, 0);
		btrfs_wait_ordered_extents(root, 1);

		trans = btrfs_attach_transaction_barrier(root);
		if (IS_ERR(trans)) {