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, 8 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index d6add69bc17..6b0f6e9993a 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -163,14 +163,6 @@ struct inodes_stat_t {
 #define WRITE_FLUSH_FUA         (WRITE | REQ_SYNC | REQ_NOIDLE | REQ_UNPLUG | \
                                  REQ_FLUSH | REQ_FUA)
 
-/*
- * These aren't really reads or writes, they pass down information about
- * parts of device that are now unused by the file system.
- */
-#define DISCARD_NOBARRIER       (WRITE | REQ_DISCARD)
-#define DISCARD_BARRIER         (WRITE | REQ_DISCARD | REQ_HARDBARRIER)
-#define DISCARD_SECURE          (DISCARD_NOBARRIER | REQ_SECURE)
-
 #define SEL_IN          1
 #define SEL_OUT         2
 #define SEL_EX          4