block: remove the BLKDEV_IFL_BARRIER flag

Remove support for barriers on discards, which is unused now.  Also
remove the DISCARD_NOBARRIER I/O type in favour of just setting the
rw flags up locally in blkdev_issue_discard.

tj: Also remove DISCARD_SECURE and use REQ_SECURE directly.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

1 files changed, 0 insertions, 2 deletions

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 6b305eb4a343..cfcb3a610605 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -869,11 +869,9 @@ static inline struct request *blk_map_queue_find_tag(struct blk_queue_tag *bqt,
 }
 enum{
         BLKDEV_WAIT,    /* wait for completion */
-        BLKDEV_BARRIER, /* issue request with barrier */
         BLKDEV_SECURE,  /* secure discard */
 };
 #define BLKDEV_IFL_WAIT         (1 << BLKDEV_WAIT)
-#define BLKDEV_IFL_BARRIER      (1 << BLKDEV_BARRIER)
 #define BLKDEV_IFL_SECURE       (1 << BLKDEV_SECURE)
 extern int blkdev_issue_flush(struct block_device *, gfp_t, sector_t *,
                         unsigned long);