[GIT PULL] Single revert/fix for core block bits for 3.19

[Jens Axboe <axboe@fb.com>]

Hi Linus,

Jan reported a problem this morning with a crash in blk-mq, and after
looking over the recent changes, it's obvious that the blk-mq-tag
waitqueue handling change is buggy. We could end up _not_ doing
finish_wait() before switching to a new waitqueue, thus corrupting the
wait task list.

Please pull this one revert of the problematic change, thanks!

  git://git.kernel.dk/linux-block.git for-linus

for you to fetch changes up to 35d37c66356eed46700e0d5db87211844d43a241:

  Revert "blk-mq: Micro-optimize bt_get()" (2014-12-15 08:30:26 -0700)

----------------------------------------------------------------
Jens Axboe (1):
      Revert "blk-mq: Micro-optimize bt_get()"

 block/blk-mq-tag.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

-- 
Jens Axboe