tree d031ae663b36cba46e061d03c8161e2418442b74
parent 3b7d00f99c60b31e1cff0efc6b9178eea3696e27
author Qu Wenruo <quwenruo@cn.fujitsu.com> 1429167290 +0800
committer Chris Mason <clm@fb.com> 1433953545 -0700

btrfs: backref: Add special time_seq == (u64)-1 case for
btrfs_find_all_roots().

Allow btrfs_find_all_roots() to skip all delayed_ref_head lock and tree
lock to do tree search.

This is important for later qgroup implement which will call
find_all_roots() after fs trees are committed.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>