From 5a8ce240d4d302d27a58fd34499b2404b3a8df4f Mon Sep 17 00:00:00 2001 From: Ming Lei Date: Sun, 17 Mar 2019 18:01:06 +0800 Subject: [PATCH] block: cleanup bio_add_pc_page REQ_PC is out of date, so replace it with passthrough IO. Also remove the local variable of 'prev' since we can reuse the top local variable of 'bvec'. No function change. Cc: Omar Sandoval Cc: Christoph Hellwig Signed-off-by: Ming Lei Signed-off-by: Jens Axboe --- block/bio.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/block/bio.c b/block/bio.c index b2423e7aae08..cbd202250a32 100644 --- a/block/bio.c +++ b/block/bio.c @@ -648,7 +648,7 @@ struct bio *bio_clone_fast(struct bio *bio, gfp_t gfp_mask, struct bio_set *bs) EXPORT_SYMBOL(bio_clone_fast); /** - * bio_add_pc_page - attempt to add page to bio + * bio_add_pc_page - attempt to add page to passthrough bio * @q: the target queue * @bio: destination bio * @page: page to add @@ -660,7 +660,7 @@ EXPORT_SYMBOL(bio_clone_fast); * limitations. The target block device must allow bio's up to PAGE_SIZE, * so it is always possible to add a single page to an empty bio. * - * This should only be used by REQ_PC bios. + * This should only be used by passthrough bios. */ int bio_add_pc_page(struct request_queue *q, struct bio *bio, struct page *page, unsigned int len, unsigned int offset) @@ -683,11 +683,11 @@ int bio_add_pc_page(struct request_queue *q, struct bio *bio, struct page * a consecutive offset. Optimize this special case. */ if (bio->bi_vcnt > 0) { - struct bio_vec *prev = &bio->bi_io_vec[bio->bi_vcnt - 1]; + bvec = &bio->bi_io_vec[bio->bi_vcnt - 1]; - if (page == prev->bv_page && - offset == prev->bv_offset + prev->bv_len) { - prev->bv_len += len; + if (page == bvec->bv_page && + offset == bvec->bv_offset + bvec->bv_len) { + bvec->bv_len += len; bio->bi_iter.bi_size += len; goto done; } @@ -696,7 +696,7 @@ int bio_add_pc_page(struct request_queue *q, struct bio *bio, struct page * If the queue doesn't support SG gaps and adding this * offset would create a gap, disallow it. */ - if (bvec_gap_to_prev(q, prev, offset)) + if (bvec_gap_to_prev(q, bvec, offset)) return 0; } -- 2.30.2