summaryrefslogtreecommitdiff
path: root/include/linux
diff options
context:
space:
mode:
authorJens Axboe <axboe@fb.com>2014-10-29 11:18:26 -0600
committerJens Axboe <axboe@fb.com>2014-10-29 11:18:26 -0600
commite167dfb53cb85fde7b15f644e9dbef7ba31896b6 (patch)
treebaf22faa1d3de6c2a70faeacc0599f01f5469a2d /include/linux
parent74c450521dd8d245b982da62592a18aa6f88b045 (diff)
blk-mq: add BLK_MQ_F_DEFER_ISSUE support flag
Drivers can now tell blk-mq if they take advantage of the deferred issue through 'last' or not. If they do, don't do queue-direct for sync IO. This is a preparation patch for the nvme conversion. Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/blk-mq.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index be01d7a687d4..c3b64ec5321e 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -146,6 +146,7 @@ enum {
BLK_MQ_F_TAG_SHARED = 1 << 1,
BLK_MQ_F_SG_MERGE = 1 << 2,
BLK_MQ_F_SYSFS_UP = 1 << 3,
+ BLK_MQ_F_DEFER_ISSUE = 1 << 4,
BLK_MQ_S_STOPPED = 0,
BLK_MQ_S_TAG_ACTIVE = 1,