It was being open coded in a few places.

Signed-off-by: Kent Overstreet <k...@daterainc.com>
Cc: Jens Axboe <ax...@kernel.dk>
Cc: Joern Engel <jo...@logfs.org>
Cc: Prasad Joshi <prasadjoshi.li...@gmail.com>
---
 block/blk-flush.c   | 19 +------------------
 fs/logfs/dev_bdev.c |  8 +-------
 2 files changed, 2 insertions(+), 25 deletions(-)

diff --git a/block/blk-flush.c b/block/blk-flush.c
index 5580b05..9288aaf 100644
--- a/block/blk-flush.c
+++ b/block/blk-flush.c
@@ -502,15 +502,6 @@ void blk_abort_flushes(struct request_queue *q)
        }
 }
 
-static void bio_end_flush(struct bio *bio, int err)
-{
-       if (err)
-               clear_bit(BIO_UPTODATE, &bio->bi_flags);
-       if (bio->bi_private)
-               complete(bio->bi_private);
-       bio_put(bio);
-}
-
 /**
  * blkdev_issue_flush - queue a flush
  * @bdev:      blockdev to issue flush for
@@ -526,7 +517,6 @@ static void bio_end_flush(struct bio *bio, int err)
 int blkdev_issue_flush(struct block_device *bdev, gfp_t gfp_mask,
                sector_t *error_sector)
 {
-       DECLARE_COMPLETION_ONSTACK(wait);
        struct request_queue *q;
        struct bio *bio;
        int ret = 0;
@@ -548,13 +538,9 @@ int blkdev_issue_flush(struct block_device *bdev, gfp_t 
gfp_mask,
                return -ENXIO;
 
        bio = bio_alloc(gfp_mask, 0);
-       bio->bi_end_io = bio_end_flush;
        bio->bi_bdev = bdev;
-       bio->bi_private = &wait;
 
-       bio_get(bio);
-       submit_bio(WRITE_FLUSH, bio);
-       wait_for_completion_io(&wait);
+       ret = submit_bio_wait(WRITE_FLUSH, bio);
 
        /*
         * The driver must store the error location in ->bi_sector, if
@@ -564,9 +550,6 @@ int blkdev_issue_flush(struct block_device *bdev, gfp_t 
gfp_mask,
        if (error_sector)
                *error_sector = bio->bi_iter.bi_sector;
 
-       if (!bio_flagged(bio, BIO_UPTODATE))
-               ret = -EIO;
-
        bio_put(bio);
        return ret;
 }
diff --git a/fs/logfs/dev_bdev.c b/fs/logfs/dev_bdev.c
index ca42715..80adce7 100644
--- a/fs/logfs/dev_bdev.c
+++ b/fs/logfs/dev_bdev.c
@@ -23,7 +23,6 @@ static int sync_request(struct page *page, struct 
block_device *bdev, int rw)
 {
        struct bio bio;
        struct bio_vec bio_vec;
-       struct completion complete;
 
        bio_init(&bio);
        bio.bi_max_vecs = 1;
@@ -35,13 +34,8 @@ static int sync_request(struct page *page, struct 
block_device *bdev, int rw)
        bio.bi_iter.bi_size = PAGE_SIZE;
        bio.bi_bdev = bdev;
        bio.bi_iter.bi_sector = page->index * (PAGE_SIZE >> 9);
-       init_completion(&complete);
-       bio.bi_private = &complete;
-       bio.bi_end_io = request_complete;
 
-       submit_bio(rw, &bio);
-       wait_for_completion(&complete);
-       return test_bit(BIO_UPTODATE, &bio.bi_flags) ? 0 : -EIO;
+       return submit_bio_wait(rw, &bio);
 }
 
 static int bdev_readpage(void *_sb, struct page *page)
-- 
1.8.4.rc3

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