diff options
| author | Liu Bo <[email protected]> | 2017-10-10 15:51:02 -0600 |
|---|---|---|
| committer | David Sterba <[email protected]> | 2018-01-22 16:08:11 +0100 |
| commit | 47dba17171a76ea2a2a7153f9aa9f28579bfd350 (patch) | |
| tree | f5e875b56a2453a1cba4734da97cd23f690485a0 | |
| parent | 8577787fac828a9873064ccec986f4be6156615d (diff) | |
Btrfs: remove rcu_barrier in btrfs_close_devices
It was introduced because btrfs used to do blkdev_put in a deferred
work, now that btrfs has blkdev_put in place, this rcu_barrier can be
removed.
modprobe -r btrfs will do btrfs_cleanup_fs_uuids(), where it cleanup
every %fs_devices on the list, but when we do btrfs_close_devices(), we
have replaced the devices on the list with dummy ones which only have
the same name and uuid, so modprobe -r btrfs will free those instead of
what we were using, this change won't cause a problem for it.
Signed-off-by: Liu Bo <[email protected]>
Reviewed-by: Anand Jain <[email protected]>
Reviewed-by: David Sterba <[email protected]>
[ copied 2nd paragraph from mailinglist discussion ]
Signed-off-by: David Sterba <[email protected]>
| -rw-r--r-- | fs/btrfs/volumes.c | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index c96635a26803..7ea81e1b361f 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -936,12 +936,6 @@ int btrfs_close_devices(struct btrfs_fs_devices *fs_devices) __btrfs_close_devices(fs_devices); free_fs_devices(fs_devices); } - /* - * Wait for rcu kworkers under __btrfs_close_devices - * to finish all blkdev_puts so device is really - * free when umount is done. - */ - rcu_barrier(); return ret; } |