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Subject[PATCH 13/17] block: move rq->start_time initialization to blk_rq_init()
Date
Impact: rq->start_time is valid for all requests

rq->start_time was initialized in init_request_from_bio() so special
requests didn't have start_time set. This has been okay as start_time
has been used only for fs requests; however, there is no indication of
this actually is the case or not. Set rq->start_time in blk_rq_init()
and guarantee that all initialized rq's have its start_time set. This
improves consistency at virtually no cost and future changes will make
use of the timestamp for !bio requests.

Signed-off-by: Tejun Heo <tj@kernel.org>
---
block/blk-core.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/block/blk-core.c b/block/blk-core.c
index b1781dd..7d0ab48 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -134,6 +134,7 @@ void blk_rq_init(struct request_queue *q, struct request *rq)
rq->cmd = rq->__cmd;
rq->tag = -1;
rq->ref_count = 1;
+ rq->start_time = jiffies;
}
EXPORT_SYMBOL(blk_rq_init);

@@ -1094,7 +1095,6 @@ void init_request_from_bio(struct request *req, struct bio *bio)
req->errors = 0;
req->hard_sector = req->sector = bio->bi_sector;
req->ioprio = bio_prio(bio);
- req->start_time = jiffies;
blk_rq_bio_prep(req->q, req, bio);
}

--
1.6.0.2


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