md-multipath: stop using bio_devname

Use the %pg format specifier to save on stack consuption and code size.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Song Liu <song@kernel.org>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Link: https://lore.kernel.org/r/20220304180105.409765-7-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/md/md-multipath.c b/drivers/md/md-multipath.c
index 97fb948e3e74141ddf02299fb0e848583c32fc82..3081a936350d238c12d4b64084fea1c39138a46a 100644 (file)
--- a/drivers/md/md-multipath.c
+++ b/drivers/md/md-multipath.c
@@ -297,7 +297,6 @@ static void multipathd(struct md_thread *thread)
 
        md_check_recovery(mddev);
        for (;;) {
-               char b[BDEVNAME_SIZE];
                spin_lock_irqsave(&conf->device_lock, flags);
                if (list_empty(head))
                        break;
@@ -309,13 +308,13 @@ static void multipathd(struct md_thread *thread)
                bio->bi_iter.bi_sector = mp_bh->master_bio->bi_iter.bi_sector;
 
                if ((mp_bh->path = multipath_map (conf))<0) {
-                       pr_err("multipath: %s: unrecoverable IO read error for block %llu\n",
-                              bio_devname(bio, b),
+                       pr_err("multipath: %pg: unrecoverable IO read error for block %llu\n",
+                              bio->bi_bdev,
                               (unsigned long long)bio->bi_iter.bi_sector);
                        multipath_end_bh_io(mp_bh, BLK_STS_IOERR);
                } else {
-                       pr_err("multipath: %s: redirecting sector %llu to another IO path\n",
-                              bio_devname(bio, b),
+                       pr_err("multipath: %pg: redirecting sector %llu to another IO path\n",
+                              bio->bi_bdev,
                               (unsigned long long)bio->bi_iter.bi_sector);
                        *bio = *(mp_bh->master_bio);
                        bio->bi_iter.bi_sector +=