[PATCH 05/12] btrfs: simplify scrub_recheck_block

[Christoph Hellwig <hch@xxxxxx>]

The I/O in repair_io_failue is synchronous and doesn't need a btrfs_bio,
so just use an on-stack bio.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Qu Wenruo <wqu@xxxxxxxx>
---
 fs/btrfs/scrub.c | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c
index a726962a51984..74c0557e6a2f9 100644
--- a/fs/btrfs/scrub.c
+++ b/fs/btrfs/scrub.c
@@ -1462,8 +1462,9 @@ static void scrub_recheck_block(struct btrfs_fs_info *fs_info,
 		return scrub_recheck_block_on_raid56(fs_info, sblock);
 
 	for (page_num = 0; page_num < sblock->page_count; page_num++) {
-		struct bio *bio;
 		struct scrub_page *spage = sblock->pagev[page_num];
+		struct bio bio;
+		struct bio_vec bvec;
 
 		if (spage->dev->bdev == NULL) {
 			spage->io_error = 1;
@@ -1472,20 +1473,17 @@ static void scrub_recheck_block(struct btrfs_fs_info *fs_info,
 		}
 
 		WARN_ON(!spage->page);
-		bio = btrfs_bio_alloc(1);
-		bio_set_dev(bio, spage->dev->bdev);
-
-		bio_add_page(bio, spage->page, fs_info->sectorsize, 0);
-		bio->bi_iter.bi_sector = spage->physical >> 9;
-		bio->bi_opf = REQ_OP_READ;
+		bio_init(&bio, spage->dev->bdev, &bvec, 1, REQ_OP_READ);
+		bio_add_page(&bio, spage->page, fs_info->sectorsize, 0);
+		bio.bi_iter.bi_sector = spage->physical >> 9;
 
-		btrfsic_check_bio(bio);
-		if (submit_bio_wait(bio)) {
+		btrfsic_check_bio(&bio);
+		if (submit_bio_wait(&bio)) {
 			spage->io_error = 1;
 			sblock->no_io_error_seen = 0;
 		}
 
-		bio_put(bio);
+		bio_uninit(&bio);
 	}
 
 	if (sblock->no_io_error_seen)
-- 
2.30.2