block: Add submit_bio_wait(), remove from md

Random cleanup - this code was duplicated and it's not really specific
to md.

Also added the ability to return the actual error code.

Signed-off-by: Kent Overstreet <koverstreet@google.com>
CC: Jens Axboe <axboe@kernel.dk>
CC: NeilBrown <neilb@suse.de>
Acked-by: Tejun Heo <tj@kernel.org>

1 files changed, 0 insertions, 19 deletions

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index f741c9fe25c8..800748d585ca 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -2059,25 +2059,6 @@ static void fix_read_error(struct r1conf *conf, int read_disk,
         }
 }
 
-static void bi_complete(struct bio *bio, int error)
-{
-        complete((struct completion *)bio->bi_private);
-}
-
-static int submit_bio_wait(int rw, struct bio *bio)
-{
-        struct completion event;
-        rw |= REQ_SYNC;
-
-        init_completion(&event);
-        bio->bi_private = &event;
-        bio->bi_end_io = bi_complete;
-        submit_bio(rw, bio);
-        wait_for_completion(&event);
-
-        return test_bit(BIO_UPTODATE, &bio->bi_flags);
-}
-
 static int narrow_write_error(struct r1bio *r1_bio, int i)
 {
         struct mddev *mddev = r1_bio->mddev;