tree 345c84adb239a05cb0477c618a36617d34efa2d9
parent 8afd6841e13f8bbdf543c576bc1b919d331003ea
author Zhao Lei <zhaolei@cn.fujitsu.com> 1452581919 +0800
committer David Sterba <dsterba@suse.com> 1455787643 +0100

btrfs: reada: simplify dev->reada_in_flight processing

No need to decrease dev->reada_in_flight in __readahead_hook()'s
internal and reada_extent_put().
reada_extent_put() have no chance to decrease dev->reada_in_flight
in free operation, because reada_extent have additional refcnt when
scheduled to a dev.

We can put inc and dec operation for dev->reada_in_flight to one
place instead to make logic simple and safe, and move useless
reada_extent->scheduled_for to a bool flag instead.

Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>