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authorChristoph Hellwig <hch@lst.de>2010-11-10 14:54:09 +0100
committerJens Axboe <jaxboe@fusionio.com>2010-11-10 14:54:09 +0100
commit02e031cbc843b010e72fcc05c76113c688b2860f (patch)
tree9f68559ec3acc39bcc4ce2ff87043a094eaa2e8f /drivers/block
parent00e375e7e962f938f6b3c93e4cd097a5e26cc788 (diff)
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block: remove REQ_HARDBARRIER
REQ_HARDBARRIER is dead now, so remove the leftovers. What's left at this point is: - various checks inside the block layer. - sanity checks in bio based drivers. - now unused bio_empty_barrier helper. - Xen blockfront use of BLKIF_OP_WRITE_BARRIER - it's dead for a while, but Xen really needs to sort out it's barrier situaton. - setting of ordered tags in uas - dead code copied from old scsi drivers. - scsi different retry for barriers - it's dead and should have been removed when flushes were converted to FS requests. - blktrace handling of barriers - removed. Someone who knows blktrace better should add support for REQ_FLUSH and REQ_FUA, though. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'drivers/block')
-rw-r--r--drivers/block/aoe/aoeblk.c3
-rw-r--r--drivers/block/loop.c6
-rw-r--r--drivers/block/xen-blkfront.c2
3 files changed, 0 insertions, 11 deletions
diff --git a/drivers/block/aoe/aoeblk.c b/drivers/block/aoe/aoeblk.c
index 541e188..528f631 100644
--- a/drivers/block/aoe/aoeblk.c
+++ b/drivers/block/aoe/aoeblk.c
@@ -180,9 +180,6 @@ aoeblk_make_request(struct request_queue *q, struct bio *bio)
BUG();
bio_endio(bio, -ENXIO);
return 0;
- } else if (bio->bi_rw & REQ_HARDBARRIER) {
- bio_endio(bio, -EOPNOTSUPP);
- return 0;
} else if (bio->bi_io_vec == NULL) {
printk(KERN_ERR "aoe: bi_io_vec is NULL\n");
BUG();
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 1e5284e..7ea0bea 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -481,12 +481,6 @@ static int do_bio_filebacked(struct loop_device *lo, struct bio *bio)
if (bio_rw(bio) == WRITE) {
struct file *file = lo->lo_backing_file;
- /* REQ_HARDBARRIER is deprecated */
- if (bio->bi_rw & REQ_HARDBARRIER) {
- ret = -EOPNOTSUPP;
- goto out;
- }
-
if (bio->bi_rw & REQ_FLUSH) {
ret = vfs_fsync(file, 0);
if (unlikely(ret && ret != -EINVAL)) {
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 06e2812..255035c 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -289,8 +289,6 @@ static int blkif_queue_request(struct request *req)
ring_req->operation = rq_data_dir(req) ?
BLKIF_OP_WRITE : BLKIF_OP_READ;
- if (req->cmd_flags & REQ_HARDBARRIER)
- ring_req->operation = BLKIF_OP_WRITE_BARRIER;
ring_req->nr_segments = blk_rq_map_sg(req->q, req, info->sg);
BUG_ON(ring_req->nr_segments > BLKIF_MAX_SEGMENTS_PER_REQUEST);