From 5705f7021748a69d84d6567e68e8851dab551464 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Tue, 25 Sep 2007 12:35:59 +0200 Subject: 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 Various compile fixes by me... Signed-off-by: Jens Axboe --- block/ll_rw_blk.c | 19 ++++++------------- 1 file changed, 6 insertions(+), 13 deletions(-) (limited to 'block/ll_rw_blk.c') diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c index e35119a72a4..094c0fa5c40 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; } -- cgit v1.2.3