bio: first step in sanitizing the bio->bi_rw flag testing

Get rid of any functions that test for these bits and make callers
use bio_rw_flagged() directly. Then it is at least directly apparent
what variable and flag they check.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/block/elevator.c b/block/elevator.c
index ca861927ba41..1975b619c86d 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -79,7 +79,8 @@ int elv_rq_merge_ok(struct request *rq, struct bio *bio)
         /*
          * Don't merge file system requests and discard requests
          */
-        if (bio_discard(bio) != bio_discard(rq->bio))
+        if (bio_rw_flagged(bio, BIO_RW_DISCARD) !=
+            bio_rw_flagged(rq->bio, BIO_RW_DISCARD))
                 return 0;
 
         /*