tree 4c950e22a7db4c2f0d5a65462b3f9081f4f6132e
parent 387ac089361fbe5ef287e6950c5c40f6b18e5c55
author ike Snitzer <snitzer@redhat.com> 1281283893 -0400
committer Jens Axboe <jaxboe@fusionio.com> 1281283893 -0400

block: update request stacking methods to support discards

Propagate REQ_DISCARD in cmd_flags when cloning a discard request.
Skip blk_rq_check_limits's existing checks for discard requests because
discard limits will have already been checked in blkdev_issue_discard.

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>