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>
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@ -866,7 +866,7 @@ int btrfs_sync_fs(struct super_block *sb, int wait)
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return 0;
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}
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btrfs_wait_ordered_extents(root, 0);
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btrfs_wait_ordered_extents(root, 1);
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trans = btrfs_attach_transaction_barrier(root);
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if (IS_ERR(trans)) {
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