Pull blkcg fix from Jens Axboe:
"One final fix that should go into 4.3. It's a simple 2x1 liner,
fixing a blkcg accounting issue. It was using the wrong bio member to
look at the sync and write bits..."
* 'for-linus' of git://git.kernel.dk/linux-block:
blkcg: fix incorrect read/write sync/async stat accounting