bcache: use op_is_write instead of checking for REQ_WRITE

We currently set REQ_WRITE/WRITE for all non READ IOs
like discard, flush, writesame, etc. In the next patches where we
no longer set up the op as a bitmap, we will not be able to
detect a operation direction like writesame by testing if REQ_WRITE is
set.

This has bcache use the op_is_write helper which will do the right
thing.

Signed-off-by: Mike Christie <mchristi@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/md/bcache/request.c b/drivers/md/bcache/request.c
index 25fa8445bb24..6b85a23ec92a 100644
--- a/drivers/md/bcache/request.c
+++ b/drivers/md/bcache/request.c
@@ -383,7 +383,7 @@ static bool check_should_bypass(struct cached_dev *dc, struct bio *bio)
 
         if (mode == CACHE_MODE_NONE ||
             (mode == CACHE_MODE_WRITEAROUND &&
-             (bio->bi_rw & REQ_WRITE)))
+             op_is_write(bio_op(bio))))
                 goto skip;
 
         if (bio->bi_iter.bi_sector & (c->sb.block_size - 1) ||
@@ -404,7 +404,7 @@ static bool check_should_bypass(struct cached_dev *dc, struct bio *bio)
 
         if (!congested &&
             mode == CACHE_MODE_WRITEBACK &&
-            (bio->bi_rw & REQ_WRITE) &&
+            op_is_write(bio_op(bio)) &&
             (bio->bi_rw & REQ_SYNC))
                 goto rescale;
 
@@ -657,7 +657,7 @@ static inline struct search *search_alloc(struct bio *bio,
         s->cache_miss           = NULL;
         s->d                    = d;
         s->recoverable          = 1;
-        s->write                = (bio->bi_rw & REQ_WRITE) != 0;
+        s->write                = op_is_write(bio_op(bio));
         s->read_dirty_data      = 0;
         s->start_time           = jiffies;