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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/disk-io.c | |
| parent | f556faa46eb4e96d0d0772e74ecf66781e132f72 (diff) | |
| download | talos-obmc-linux-3280f874576d31b03fe19cbcc23585d96feb4ceb.tar.gz talos-obmc-linux-3280f874576d31b03fe19cbcc23585d96feb4ceb.zip | |
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/disk-io.c')
| -rw-r--r-- | fs/btrfs/disk-io.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 517484ecad96..79903243877b 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -2155,7 +2155,6 @@ static void btrfs_init_dev_replace_locks(struct btrfs_fs_info *fs_info) { mutex_init(&fs_info->dev_replace.lock_finishing_cancel_unmount); rwlock_init(&fs_info->dev_replace.lock); - atomic_set(&fs_info->dev_replace.read_locks, 0); atomic_set(&fs_info->dev_replace.blocking_readers, 0); init_waitqueue_head(&fs_info->replace_wait); init_waitqueue_head(&fs_info->dev_replace.read_lock_wq); |
