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authorMing Lei <ming.lei@redhat.com>2019-03-17 18:01:06 +0800
committerJens Axboe <axboe@kernel.dk>2019-04-01 12:11:25 -0600
commit5a8ce240d4d302d27a58fd34499b2404b3a8df4f (patch)
tree3e72e367d8d92b0bab50a965d4ce6c6ee94b994c
parentfd7d8d4232f08b0df623d9ea7e941f0350a26e14 (diff)
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REQ_PC is out of date, so replace it with passthrough IO.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 <osandov@fb.com> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
-rw-r--r--block/bio.c14
1 files 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;
}