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| author | Jens Axboe <axboe@suse.de> | 2006-07-06 10:18:05 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@suse.de> | 2006-07-06 10:18:05 +0200 |
| commit | 1959d21232931dfa686769a21161413f10d6652f (patch) | |
| tree | c311b9fce998ce66665bda261c470a6fb981aa5c | |
| parent | 40359ccb836866435b03a0cb57345002b587d875 (diff) | |
| download | olio-linux-3.10-1959d21232931dfa686769a21161413f10d6652f.tar.xz olio-linux-3.10-1959d21232931dfa686769a21161413f10d6652f.zip | |
[PATCH] Only the first two bits in bio->bi_rw and rq->flags match
Not three, as assumed. This causes the barrier bit to be needlessly set
for some IO.
Signed-off-by: Jens Axboe <axboe@suse.de>
| -rw-r--r-- | block/ll_rw_blk.c | 4 | ||||
| -rw-r--r-- | include/linux/blktrace_api.h | 2 |
2 files changed, 3 insertions, 3 deletions
diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c index ab17c7224bb..61d6b3c65b6 100644 --- a/block/ll_rw_blk.c +++ b/block/ll_rw_blk.c @@ -3491,8 +3491,8 @@ EXPORT_SYMBOL(end_request); void blk_rq_bio_prep(request_queue_t *q, struct request *rq, struct bio *bio) { - /* first three bits are identical in rq->flags and bio->bi_rw */ - rq->flags |= (bio->bi_rw & 7); + /* first two bits are identical in rq->flags and bio->bi_rw */ + rq->flags |= (bio->bi_rw & 3); rq->nr_phys_segments = bio_phys_segments(q, bio); rq->nr_hw_segments = bio_hw_segments(q, bio); diff --git a/include/linux/blktrace_api.h b/include/linux/blktrace_api.h index 2346a1db856..7520cc1ff9e 100644 --- a/include/linux/blktrace_api.h +++ b/include/linux/blktrace_api.h @@ -148,7 +148,7 @@ static inline void blk_add_trace_rq(struct request_queue *q, struct request *rq, u32 what) { struct blk_trace *bt = q->blk_trace; - int rw = rq->flags & 0x07; + int rw = rq->flags & 0x03; if (likely(!bt)) return; |