block: use REQ_FLUSH in blkdev_issue_flush()

Update blkdev_issue_flush() to use new REQ_FLUSH interface.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

diff --git a/block/blk-flush.c b/block/blk-flush.c
index 7d1fc98..62b7df9 100644 (file)
--- a/block/blk-flush.c
+++ b/block/blk-flush.c
@@ -191,13 +191,10 @@ struct request *blk_do_flush(struct request_queue *q, struct request *rq)
        return blk_flush_complete_seq(q, skip, 0);
 }
 
-static void bio_end_empty_barrier(struct bio *bio, int err)
+static void bio_end_flush(struct bio *bio, int err)
 {
-       if (err) {
-               if (err == -EOPNOTSUPP)
-                       set_bit(BIO_EOPNOTSUPP, &bio->bi_flags);
+       if (err)
                clear_bit(BIO_UPTODATE, &bio->bi_flags);
-       }
        if (bio->bi_private)
                complete(bio->bi_private);
        bio_put(bio);
@@ -235,19 +232,19 @@ int blkdev_issue_flush(struct block_device *bdev, gfp_t gfp_mask,
         * some block devices may not have their queue correctly set up here
         * (e.g. loop device without a backing file) and so issuing a flush
         * here will panic. Ensure there is a request function before issuing
-        * the barrier.
+        * the flush.
         */
        if (!q->make_request_fn)
                return -ENXIO;
 
        bio = bio_alloc(gfp_mask, 0);
-       bio->bi_end_io = bio_end_empty_barrier;
+       bio->bi_end_io = bio_end_flush;
        bio->bi_bdev = bdev;
        if (test_bit(BLKDEV_WAIT, &flags))
                bio->bi_private = &wait;
 
        bio_get(bio);
-       submit_bio(WRITE_BARRIER, bio);
+       submit_bio(WRITE_FLUSH, bio);
        if (test_bit(BLKDEV_WAIT, &flags)) {
                wait_for_completion(&wait);
                /*
@@ -259,9 +256,7 @@ int blkdev_issue_flush(struct block_device *bdev, gfp_t gfp_mask,
                        *error_sector = bio->bi_sector;
        }
 
-       if (bio_flagged(bio, BIO_EOPNOTSUPP))
-               ret = -EOPNOTSUPP;
-       else if (!bio_flagged(bio, BIO_UPTODATE))
+       if (!bio_flagged(bio, BIO_UPTODATE))
                ret = -EIO;
 
        bio_put(bio);