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>

3 files changed, 4 insertions, 7 deletions

diff --git a/block/blk-core.c b/block/blk-core.c
index 86a1afeef606..7236b826f4a1 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1586,7 +1586,7 @@ static void handle_bad_sector(struct bio *bio)
         printk(KERN_INFO "%s: rw=%ld, want=%Lu, limit=%Lu\n",
                         bdevname(bio->bi_bdev, b),
                         bio->bi_rw,
-                        (unsigned long long)bio->bi_sector + bio_sectors(bio),
+                        (unsigned long long)bio_end_sector(bio),
                         (long long)(i_size_read(bio->bi_bdev->bd_inode) >> 9));
 
         set_bit(BIO_EOF, &bio->bi_flags);
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 4f0ade74cfd0..d5cd3131c57a 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -2270,11 +2270,8 @@ cfq_find_rq_fmerge(struct cfq_data *cfqd, struct bio *bio)
                 return NULL;
 
         cfqq = cic_to_cfqq(cic, cfq_bio_sync(bio));
-        if (cfqq) {
-                sector_t sector = bio->bi_sector + bio_sectors(bio);
-
-                return elv_rb_find(&cfqq->sort_list, sector);
-        }
+        if (cfqq)
+                return elv_rb_find(&cfqq->sort_list, bio_end_sector(bio));
 
         return NULL;
 }
diff --git a/block/deadline-iosched.c b/block/deadline-iosched.c
index 90037b5eb17f..ba19a3afab79 100644
--- a/block/deadline-iosched.c
+++ b/block/deadline-iosched.c
@@ -132,7 +132,7 @@ deadline_merge(struct request_queue *q, struct request **req, struct bio *bio)
          * check for front merge
          */
         if (dd->front_merges) {
-                sector_t sector = bio->bi_sector + bio_sectors(bio);
+                sector_t sector = bio_end_sector(bio);
 
                 __rq = elv_rb_find(&dd->sort_list[bio_data_dir(bio)], sector);
                 if (__rq) {