[PATCH 0/4][v2] Lockdep fixes

[Josef Bacik <josef@toxicpanda.com>]

v1->v2:
- Included the add_missing_dev patch in the series.
- Added a patch to kill the rcu protection for fs_info->space_info.
- Fixed the raid sysfs init stuff to be completely out of link_block_group, as
  it causes a lockdep splat with the rwsem conversion.

Hello,

These are the last two lockdep splats I'm able to see in my testing.  We have
like 4 variations of the same lockdep splat that's addressed by 

btrfs: do not create raid sysfs entries under chunk_mutex

Basically this particular dependency pulls in the kernfs_mutex under the
chunk_mutex, and so we have like 4 issues in github with slightly different
splats, but are all fixed by that fix.  With these two patches (and the one I
sent the other day for add_missing_dev) I haven't hit any lockdep splats in 6
runs of xfstests on 3 different VMs in the last 12 hours.  That means it should
take Dave at least 2 runs before he hits a new one.  Thanks,

Josef Bacik (4):
  btrfs: fix lockdep splat in add_missing_dev
  btrfs: init sysfs for devices outside of the chunk_mutex
  btrfs: kill the rcu protection for fs_info->space_info
  btrfs: do not create raid sysfs entries under any locks

 fs/btrfs/block-group.c | 47 ++++++++++++++++++++++++------------------
 fs/btrfs/ioctl.c       | 10 ++-------
 fs/btrfs/space-info.c  | 14 ++++---------
 fs/btrfs/super.c       |  5 +----
 fs/btrfs/sysfs.c       | 25 ++++++++++++++++++++--
 fs/btrfs/volumes.c     | 17 ++++++++++++---
 6 files changed, 71 insertions(+), 47 deletions(-)

-- 
2.26.2