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| author | NeilBrown <neilb@suse.de> | 2007-09-25 12:35:59 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@carl.home.kernel.dk> | 2007-10-10 09:25:56 +0200 |
| commit | 5705f7021748a69d84d6567e68e8851dab551464 (patch) | |
| tree | 5a6dbc8fc6055c0334f4a97540e36a7844b9c482 /block | |
| parent | 9dfa52831e96194b8649613e3131baa2c109f7dc (diff) | |
| download | blackbird-op-linux-5705f7021748a69d84d6567e68e8851dab551464.tar.gz blackbird-op-linux-5705f7021748a69d84d6567e68e8851dab551464.zip | |
Introduce rq_for_each_segment replacing rq_for_each_bio
Every usage of rq_for_each_bio wraps a usage of
bio_for_each_segment, so these can be combined into
rq_for_each_segment.
We define "struct req_iterator" to hold the 'bio' and 'index' that
are needed for the double iteration.
Signed-off-by: Neil Brown <neilb@suse.de>
Various compile fixes by me...
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block')
| -rw-r--r-- | block/ll_rw_blk.c | 19 |
1 files changed, 6 insertions, 13 deletions
diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c index e35119a72a44..094c0fa5c405 100644 --- a/block/ll_rw_blk.c +++ b/block/ll_rw_blk.c @@ -1244,8 +1244,7 @@ static void blk_recalc_rq_segments(struct request *rq) int seg_size; int hw_seg_size; int cluster; - struct bio *bio; - int i; + struct req_iterator iter; int high, highprv = 1; struct request_queue *q = rq->q; @@ -1255,8 +1254,7 @@ static void blk_recalc_rq_segments(struct request *rq) cluster = q->queue_flags & (1 << QUEUE_FLAG_CLUSTER); hw_seg_size = seg_size = 0; phys_size = hw_size = nr_phys_segs = nr_hw_segs = 0; - rq_for_each_bio(bio, rq) - bio_for_each_segment(bv, bio, i) { + rq_for_each_segment(bv, rq, iter) { /* * the trick here is making sure that a high page is never * considered part of another segment, since that might @@ -1353,8 +1351,8 @@ int blk_rq_map_sg(struct request_queue *q, struct request *rq, struct scatterlist *sg) { struct bio_vec *bvec, *bvprv; - struct bio *bio; - int nsegs, i, cluster; + struct req_iterator iter; + int nsegs, cluster; nsegs = 0; cluster = q->queue_flags & (1 << QUEUE_FLAG_CLUSTER); @@ -1363,11 +1361,7 @@ int blk_rq_map_sg(struct request_queue *q, struct request *rq, * for each bio in rq */ bvprv = NULL; - rq_for_each_bio(bio, rq) { - /* - * for each segment in bio - */ - bio_for_each_segment(bvec, bio, i) { + rq_for_each_segment(bvec, rq, iter) { int nbytes = bvec->bv_len; if (bvprv && cluster) { @@ -1390,8 +1384,7 @@ new_segment: nsegs++; } bvprv = bvec; - } /* segments in bio */ - } /* bios in rq */ + } /* segments in rq */ return nsegs; } |
