tree baf22faa1d3de6c2a70faeacc0599f01f5469a2d
parent 74c450521dd8d245b982da62592a18aa6f88b045
author Jens Axboe <axboe@fb.com> 1414603106 -0600
committer Jens Axboe <axboe@fb.com> 1414603106 -0600

blk-mq: add BLK_MQ_F_DEFER_ISSUE support flag

Drivers can now tell blk-mq if they take advantage of the deferred
issue through 'last' or not. If they do, don't do queue-direct
for sync IO. This is a preparation patch for the nvme conversion.

Signed-off-by: Jens Axboe <axboe@fb.com>