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| author | NeilBrown <neilb@suse.de> | 2007-08-16 13:31:27 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@carl.home.kernel.dk> | 2007-10-10 09:25:56 +0200 |
| commit | 3001ca77128273cc5634d79f5306ce2e5a14ec41 (patch) | |
| tree | 0e5904fc170afb6c01f8f0930e3c4a4ae20b19b2 /block | |
| parent | eea9befaccb8d43ce89585d612159761c978f056 (diff) | |
| download | linux-stable-3001ca77128273cc5634d79f5306ce2e5a14ec41.tar.gz linux-stable-3001ca77128273cc5634d79f5306ce2e5a14ec41.tar.bz2 linux-stable-3001ca77128273cc5634d79f5306ce2e5a14ec41.zip | |
New function blk_req_append_bio
ll_back_merge_fn is currently exported to SCSI where is it used,
together with blk_rq_bio_prep, in exactly the same way these
functions are used in __blk_rq_map_user.
So move the common code into a new function (blk_rq_append_bio), and
don't export ll_back_merge_fn any longer.
Signed-off-by: Neil Brown <neilb@suse.de>
diff .prev/block/ll_rw_blk.c ./block/ll_rw_blk.c
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block')
| -rw-r--r-- | block/ll_rw_blk.c | 38 |
1 files changed, 22 insertions, 16 deletions
diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c index 094c0fa5c405..2de9bad1d042 100644 --- a/block/ll_rw_blk.c +++ b/block/ll_rw_blk.c @@ -1441,7 +1441,8 @@ static inline int ll_new_hw_segment(struct request_queue *q, return 1; } -int ll_back_merge_fn(struct request_queue *q, struct request *req, struct bio *bio) +static int ll_back_merge_fn(struct request_queue *q, struct request *req, + struct bio *bio) { unsigned short max_sectors; int len; @@ -1477,7 +1478,6 @@ int ll_back_merge_fn(struct request_queue *q, struct request *req, struct bio *b return ll_new_hw_segment(q, req, bio); } -EXPORT_SYMBOL(ll_back_merge_fn); static int ll_front_merge_fn(struct request_queue *q, struct request *req, struct bio *bio) @@ -2367,6 +2367,23 @@ static int __blk_rq_unmap_user(struct bio *bio) return ret; } +int blk_rq_append_bio(struct request_queue *q, struct request *rq, + struct bio *bio) +{ + if (!rq->bio) + blk_rq_bio_prep(q, rq, bio); + else if (!ll_back_merge_fn(q, rq, bio)) + return -EINVAL; + else { + rq->biotail->bi_next = bio; + rq->biotail = bio; + + rq->data_len += bio->bi_size; + } + return 0; +} +EXPORT_SYMBOL(blk_rq_append_bio); + static int __blk_rq_map_user(struct request_queue *q, struct request *rq, void __user *ubuf, unsigned int len) { @@ -2398,21 +2415,10 @@ static int __blk_rq_map_user(struct request_queue *q, struct request *rq, */ bio_get(bio); - if (!rq->bio) - blk_rq_bio_prep(q, rq, bio); - else if (!ll_back_merge_fn(q, rq, bio)) { - ret = -EINVAL; - goto unmap_bio; - } else { - rq->biotail->bi_next = bio; - rq->biotail = bio; - - rq->data_len += bio->bi_size; - } - - return bio->bi_size; + ret = blk_rq_append_bio(q, rq, bio); + if (!ret) + return bio->bi_size; -unmap_bio: /* if it was boucned we must call the end io function */ bio_endio(bio, bio->bi_size, 0); __blk_rq_unmap_user(orig_bio); |