tree 50c049a9056d96ebaf176d6a339f655282ff9098
parent 63581af3f31e0dbea112b83f77c4fbb6a10e1406
author Jens Axboe <axboe@fb.com> 1474474333 -0600
committer Jens Axboe <axboe@fb.com> 1474576118 -0600

blk-mq: add flag for drivers wanting blocking ->queue_rq()

If a driver sets BLK_MQ_F_BLOCKING, it is allowed to block in its
->queue_rq() handler. For that case, blk-mq ensures that we always
calls it from a safe context.

Signed-off-by: Jens Axboe <axboe@fb.com>
Tested-by: Josef Bacik <jbacik@fb.com>