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authorChristoph Hellwig <hch@lst.de>2019-06-06 13:29:01 +0300
committerJens Axboe <axboe@kernel.dk>2019-06-20 19:29:22 +0300
commit14ccb66b3f585b2bc21e7256c96090abed5a512c (patch)
tree7b0d48d59ee474ac1a590352507c7890c16f1e8d /block/blk-map.c
parentf924cddebc900f7cb10d5538d69523e558fa681c (diff)
downloadlinux-14ccb66b3f585b2bc21e7256c96090abed5a512c.tar.xz
block: remove the bi_phys_segments field in struct bio
We only need the number of segments in the blk-mq submission path. Remove the field from struct bio, and return it from a variant of blk_queue_split instead of that it can passed as an argument to those functions that need the value. This also means we stop recounting segments except for cloning and partial segments. To keep the number of arguments in this how path down remove pointless struct request_queue arguments from any of the functions that had it and grew a nr_segs argument. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-map.c')
-rw-r--r--block/blk-map.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/block/blk-map.c b/block/blk-map.c
index db9373bd31ac..3a62e471d81b 100644
--- a/block/blk-map.c
+++ b/block/blk-map.c
@@ -18,13 +18,19 @@
int blk_rq_append_bio(struct request *rq, struct bio **bio)
{
struct bio *orig_bio = *bio;
+ struct bvec_iter iter;
+ struct bio_vec bv;
+ unsigned int nr_segs = 0;
blk_queue_bounce(rq->q, bio);
+ bio_for_each_bvec(bv, *bio, iter)
+ nr_segs++;
+
if (!rq->bio) {
- blk_rq_bio_prep(rq->q, rq, *bio);
+ blk_rq_bio_prep(rq, *bio, nr_segs);
} else {
- if (!ll_back_merge_fn(rq->q, rq, *bio)) {
+ if (!ll_back_merge_fn(rq, *bio, nr_segs)) {
if (orig_bio != *bio) {
bio_put(*bio);
*bio = orig_bio;