Ming Lei 3a5088c8c1 block: respect BLK_MQ_F_NO_SCHED ...

If one driver claims that it doesn't support io scheduler via
BLK_MQ_F_NO_SCHED, we should not allow to change and show the
availabe io schedulers.

This patch adds check to enhance this behaviour.

Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

2017-04-19 14:15:43 -06:00

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