tree f94ff5ae016c6ca99f75c5ae2de455c065d75730
parent f556faa46eb4e96d0d0772e74ecf66781e132f72
author David Sterba <dsterba@suse.com> 1535124749 +0200
committer David Sterba <dsterba@suse.com> 1539617017 +0200

btrfs: remove btrfs_dev_replace::read_locks

This member seems to be copied from the extent_buffer locking scheme and
is at least used to assert that the read lock/unlock is properly nested.
In some way. While the _inc/_dec are called inside the read lock
section, the asserts are both inside and outside, so the ordering is not
guaranteed and we can see read/inc/dec ordered in any way
(theoretically).

A missing call of btrfs_dev_replace_clear_lock_blocking could cause
unexpected read_locks count, so this at least looks like a valid
assertion, but this will become unnecessary with later updates.

Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>