block: Add bio_end_sector()

Just a little convenience macro - main reason to add it now is preparing
for immutable bio vecs, it'll reduce the size of the patch that puts
bi_sector/bi_size/bi_idx into a struct bvec_iter.

Signed-off-by: Kent Overstreet <koverstreet@google.com>
CC: Jens Axboe <axboe@kernel.dk>
CC: Lars Ellenberg <drbd-dev@lists.linbit.com>
CC: Jiri Kosina <jkosina@suse.cz>
CC: Alasdair Kergon <agk@redhat.com>
CC: dm-devel@redhat.com
CC: Neil Brown <neilb@suse.de>
CC: Martin Schwidefsky <schwidefsky@de.ibm.com>
CC: Heiko Carstens <heiko.carstens@de.ibm.com>
CC: linux-s390@vger.kernel.org
CC: Chris Mason <chris.mason@fusionio.com>
CC: Steven Whitehouse <swhiteho@redhat.com>
Acked-by: Steven Whitehouse <swhiteho@redhat.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index fd86b372692d..4d8c2e0a6bad 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -1018,7 +1018,7 @@ static void make_request(struct mddev *mddev, struct bio * bio)
         md_write_start(mddev, bio); /* wait on superblock update early */
 
         if (bio_data_dir(bio) == WRITE &&
-            bio->bi_sector + bio->bi_size/512 > mddev->suspend_lo &&
+            bio_end_sector(bio) > mddev->suspend_lo &&
             bio->bi_sector < mddev->suspend_hi) {
                 /* As the suspend_* range is controlled by
                  * userspace, we want an interruptible
@@ -1029,7 +1029,7 @@ static void make_request(struct mddev *mddev, struct bio * bio)
                         flush_signals(current);
                         prepare_to_wait(&conf->wait_barrier,
                                         &w, TASK_INTERRUPTIBLE);
-                        if (bio->bi_sector + bio->bi_size/512 <= mddev->suspend_lo ||
+                        if (bio_end_sector(bio) <= mddev->suspend_lo ||
                             bio->bi_sector >= mddev->suspend_hi)
                                 break;
                         schedule();