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authorChristoph Hellwig <hch@infradead.org>2010-08-18 05:29:22 -0400
committerJens Axboe <jaxboe@fusionio.com>2010-09-10 12:35:40 +0200
commit8c5553678237b7121355108e03c36086037d8975 (patch)
tree7ecbc41837bf2dac6010230839e3312d6d33dd35 /block/blk-lib.c
parent31725e65c7214b52b607eba705fc4f306be4d5a5 (diff)
downloadlinux-linaro-stable-8c5553678237b7121355108e03c36086037d8975.tar.gz
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>
Diffstat (limited to 'block/blk-lib.c')
-rw-r--r--block/blk-lib.c18
1 files changed, 2 insertions, 16 deletions
diff --git a/block/blk-lib.c b/block/blk-lib.c
index c392029a104e..fe2e6ed0f510 100644
--- a/block/blk-lib.c
+++ b/block/blk-lib.c
@@ -39,8 +39,7 @@ int blkdev_issue_discard(struct block_device *bdev, sector_t sector,
{
DECLARE_COMPLETION_ONSTACK(wait);
struct request_queue *q = bdev_get_queue(bdev);
- int type = flags & BLKDEV_IFL_BARRIER ?
- DISCARD_BARRIER : DISCARD_NOBARRIER;
+ int type = REQ_WRITE | REQ_DISCARD;
unsigned int max_discard_sectors;
struct bio *bio;
int ret = 0;
@@ -65,7 +64,7 @@ int blkdev_issue_discard(struct block_device *bdev, sector_t sector,
if (flags & BLKDEV_IFL_SECURE) {
if (!blk_queue_secdiscard(q))
return -EOPNOTSUPP;
- type |= DISCARD_SECURE;
+ type |= REQ_SECURE;
}
while (nr_sects && !ret) {
@@ -162,12 +161,6 @@ int blkdev_issue_zeroout(struct block_device *bdev, sector_t sector,
bb.wait = &wait;
bb.end_io = NULL;
- if (flags & BLKDEV_IFL_BARRIER) {
- /* issue async barrier before the data */
- ret = blkdev_issue_flush(bdev, gfp_mask, NULL, 0);
- if (ret)
- return ret;
- }
submit:
ret = 0;
while (nr_sects != 0) {
@@ -199,13 +192,6 @@ submit:
issued++;
submit_bio(WRITE, bio);
}
- /*
- * When all data bios are in flight. Send final barrier if requeted.
- */
- if (nr_sects == 0 && flags & BLKDEV_IFL_BARRIER)
- ret = blkdev_issue_flush(bdev, gfp_mask, NULL,
- flags & BLKDEV_IFL_WAIT);
-
if (flags & BLKDEV_IFL_WAIT)
/* Wait for bios in-flight */