Btrfs fixes

Hi Linus,

We have a few fixes in my for-linus branch:

git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs.git for-linus

Qu Wenruo's batch fix a regression between some our merge window pull and the inode_cache feature. The rest are smaller bugs.

Qu Wenruo (2) commits (+11/-1):
btrfs: Don't call btrfs_start_transaction() on frozen fs to avoid deadlock. (+10/-0)
btrfs: Fix the bug that fs_info->pending_changes is never cleared. (+1/-1)

Satoru Takeuchi (1) commits (+1/-1):

    btrfs: fix state->private cast on 32 bit machines

David Sterba (1) commits (+2/-2):
btrfs: sync ioctl, handle errors after transaction start

Filipe Manana (1) commits (+2/-1):

    Btrfs: fix race deleting block group from space_info->ro_bgs list

Tsutomu Itoh (1) commits (+1/-1):
Btrfs: fix incorrect freeing in scrub_stripe

Total: (6) commits (+17/-6)

 fs/btrfs/ctree.h       |  1 +
 fs/btrfs/extent-tree.c |  2 +-
 fs/btrfs/extent_io.c   |  2 +-
 fs/btrfs/scrub.c       |  2 +-
 fs/btrfs/super.c       | 14 ++++++++++++--
 fs/btrfs/transaction.c |  2 +-
 6 files changed, 17 insertions(+), 6 deletions(-)