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| author | David Sterba <dsterba@suse.com> | 2018-08-24 17:32:29 +0200 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2018-10-15 17:23:37 +0200 |
| commit | 3280f874576d31b03fe19cbcc23585d96feb4ceb (patch) | |
| tree | f94ff5ae016c6ca99f75c5ae2de455c065d75730 /fs/btrfs/ctree.h | |
| parent | f556faa46eb4e96d0d0772e74ecf66781e132f72 (diff) | |
| download | linux-3280f874576d31b03fe19cbcc23585d96feb4ceb.tar.bz2 | |
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>
Diffstat (limited to 'fs/btrfs/ctree.h')
| -rw-r--r-- | fs/btrfs/ctree.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 36ade217e462..daa273c7e150 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -361,7 +361,6 @@ struct btrfs_dev_replace { struct mutex lock_finishing_cancel_unmount; rwlock_t lock; - atomic_t read_locks; atomic_t blocking_readers; wait_queue_head_t read_lock_wq; |