Btrfs, misc for 4.6

Hi,

a few low-risk patches that appeared after I sent my main pull for 4.6. I think they still apply to 4.6, the freezer patches help the livepatch to clean up the mis-use of the freezer API, the rest makes sure we don't miss an error during writing checksums.

I've removed Liu Bo's patch fixing the writeback_index, IMO needs moe review and can be merged in some later rc.

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The following changes since commit 5e33a2bd7ca7fa687fb0965869196eea6815d1f3:

Btrfs: do not collect ordered extents when logging that inode exists (2016-03-01 08:23:47 -0800)

are available in the git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git for-chris-4.6

for you to fetch changes up to 45147cbef21305b512a5b263e9e52f832a0df7b2:

btrfs: transaction_kthread() is not freezable (2016-03-21 19:02:34 +0100)

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Alex Lyakas (2):
btrfs: csum_tree_block: return proper errno value
btrfs: do not write corrupted metadata blocks to disk

Jiri Kosina (2):
btrfs: cleaner_kthread() doesn't need explicit freeze
btrfs: transaction_kthread() is not freezable

 fs/btrfs/disk-io.c | 45 +++++++++++++++++++++++++--------------------
 1 file changed, 25 insertions(+), 20 deletions(-)

FYI, I've added Filipe's reviewed-by, the top commit is now ce63f891e1a87ae79c4325dad5f512e8d6a8a78e