md: remove most calls to bdevname

Use the %pg format specifier to save on stack consumption and code size.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Song Liu <song@kernel.org>

drivers/md/md-linear.c

@@ -206,7 +206,6 @@ static void linear_free(struct mddev *mddev, void *priv)
 
 static bool linear_make_request(struct mddev *mddev, struct bio *bio)
 {
-	char b[BDEVNAME_SIZE];
 	struct dev_info *tmp_dev;
 	sector_t start_sector, end_sector, data_offset;
 	sector_t bio_sector = bio->bi_iter.bi_sector;
@@ -256,10 +255,10 @@ static bool linear_make_request(struct mddev *mddev, struct bio *bio)
 	return true;
 
 out_of_bounds:
-	pr_err("md/linear:%s: make_request: Sector %llu out of bounds on dev %s: %llu sectors, offset %llu\n",
+	pr_err("md/linear:%s: make_request: Sector %llu out of bounds on dev %pg: %llu sectors, offset %llu\n",
 	       mdname(mddev),
 	       (unsigned long long)bio->bi_iter.bi_sector,
-	       bdevname(tmp_dev->rdev->bdev, b),
+	       tmp_dev->rdev->bdev,
 	       (unsigned long long)tmp_dev->rdev->sectors,
 	       (unsigned long long)start_sector);
 	bio_io_error(bio);

drivers/md/md-multipath.c

@@ -87,10 +87,9 @@ static void multipath_end_request(struct bio *bio)
 		/*
 		 * oops, IO error:
 		 */
-		char b[BDEVNAME_SIZE];
 		md_error (mp_bh->mddev, rdev);
-		pr_info("multipath: %s: rescheduling sector %llu\n",
-			bdevname(rdev->bdev,b),
+		pr_info("multipath: %pg: rescheduling sector %llu\n",
+			rdev->bdev,
 			(unsigned long long)bio->bi_iter.bi_sector);
 		multipath_reschedule_retry(mp_bh);
 	} else
@@ -154,7 +153,6 @@ static void multipath_status(struct seq_file *seq, struct mddev *mddev)
 static void multipath_error (struct mddev *mddev, struct md_rdev *rdev)
 {
 	struct mpconf *conf = mddev->private;
-	char b[BDEVNAME_SIZE];
 
 	if (conf->raid_disks - mddev->degraded <= 1) {
 		/*
@@ -177,9 +175,9 @@ static void multipath_error (struct mddev *mddev, struct md_rdev *rdev)
 	}
 	set_bit(Faulty, &rdev->flags);
 	set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);
-	pr_err("multipath: IO failure on %s, disabling IO path.\n"
+	pr_err("multipath: IO failure on %pg, disabling IO path.\n"
 	       "multipath: Operation continuing on %d IO paths.\n",
-	       bdevname(rdev->bdev, b),
+	       rdev->bdev,
 	       conf->raid_disks - mddev->degraded);
 }
 
@@ -197,12 +195,11 @@ static void print_multipath_conf (struct mpconf *conf)
 		 conf->raid_disks);
 
 	for (i = 0; i < conf->raid_disks; i++) {
-		char b[BDEVNAME_SIZE];
 		tmp = conf->multipaths + i;
 		if (tmp->rdev)
-			pr_debug(" disk%d, o:%d, dev:%s\n",
+			pr_debug(" disk%d, o:%d, dev:%pg\n",
 				 i,!test_bit(Faulty, &tmp->rdev->flags),
-				 bdevname(tmp->rdev->bdev,b));
+				 tmp->rdev->bdev);
 	}
 }
 

drivers/md/raid0.c

@@ -37,7 +37,6 @@ static void dump_zones(struct mddev *mddev)
 	int j, k;
 	sector_t zone_size = 0;
 	sector_t zone_start = 0;
-	char b[BDEVNAME_SIZE];
 	struct r0conf *conf = mddev->private;
 	int raid_disks = conf->strip_zone[0].nb_dev;
 	pr_debug("md: RAID0 configuration for %s - %d zone%s\n",
@@ -48,9 +47,8 @@ static void dump_zones(struct mddev *mddev)
 		int len = 0;
 
 		for (k = 0; k < conf->strip_zone[j].nb_dev; k++)
-			len += snprintf(line+len, 200-len, "%s%s", k?"/":"",
-					bdevname(conf->devlist[j*raid_disks
-							       + k]->bdev, b));
+			len += snprintf(line+len, 200-len, "%s%pg", k?"/":"",
+				conf->devlist[j * raid_disks + k]->bdev);
 		pr_debug("md: zone%d=[%s]\n", j, line);
 
 		zone_size  = conf->strip_zone[j].zone_end - zone_start;
@@ -69,8 +67,6 @@ static int create_strip_zones(struct mddev *mddev, struct r0conf **private_conf)
 	struct md_rdev *smallest, *rdev1, *rdev2, *rdev, **dev;
 	struct strip_zone *zone;
 	int cnt;
-	char b[BDEVNAME_SIZE];
-	char b2[BDEVNAME_SIZE];
 	struct r0conf *conf = kzalloc(sizeof(*conf), GFP_KERNEL);
 	unsigned blksize = 512;
 
@@ -78,9 +74,9 @@ static int create_strip_zones(struct mddev *mddev, struct r0conf **private_conf)
 	if (!conf)
 		return -ENOMEM;
 	rdev_for_each(rdev1, mddev) {
-		pr_debug("md/raid0:%s: looking at %s\n",
+		pr_debug("md/raid0:%s: looking at %pg\n",
 			 mdname(mddev),
-			 bdevname(rdev1->bdev, b));
+			 rdev1->bdev);
 		c = 0;
 
 		/* round size to chunk_size */
@@ -92,12 +88,12 @@ static int create_strip_zones(struct mddev *mddev, struct r0conf **private_conf)
 				      rdev1->bdev->bd_disk->queue));
 
 		rdev_for_each(rdev2, mddev) {
-			pr_debug("md/raid0:%s:   comparing %s(%llu)"
-				 " with %s(%llu)\n",
+			pr_debug("md/raid0:%s:   comparing %pg(%llu)"
+				 " with %pg(%llu)\n",
 				 mdname(mddev),
-				 bdevname(rdev1->bdev,b),
+				 rdev1->bdev,
 				 (unsigned long long)rdev1->sectors,
-				 bdevname(rdev2->bdev,b2),
+				 rdev2->bdev,
 				 (unsigned long long)rdev2->sectors);
 			if (rdev2 == rdev1) {
 				pr_debug("md/raid0:%s:   END\n",
@@ -225,15 +221,15 @@ static int create_strip_zones(struct mddev *mddev, struct r0conf **private_conf)
 		for (j=0; j<cnt; j++) {
 			rdev = conf->devlist[j];
 			if (rdev->sectors <= zone->dev_start) {
-				pr_debug("md/raid0:%s: checking %s ... nope\n",
+				pr_debug("md/raid0:%s: checking %pg ... nope\n",
 					 mdname(mddev),
-					 bdevname(rdev->bdev, b));
+					 rdev->bdev);
 				continue;
 			}
-			pr_debug("md/raid0:%s: checking %s ..."
+			pr_debug("md/raid0:%s: checking %pg ..."
 				 " contained as device %d\n",
 				 mdname(mddev),
-				 bdevname(rdev->bdev, b), c);
+				 rdev->bdev, c);
 			dev[c] = rdev;
 			c++;
 			if (!smallest || rdev->sectors < smallest->sectors) {

drivers/md/raid1.c

@@ -402,10 +402,9 @@ static void raid1_end_read_request(struct bio *bio)
 		/*
 		 * oops, read error:
 		 */
-		char b[BDEVNAME_SIZE];
-		pr_err_ratelimited("md/raid1:%s: %s: rescheduling sector %llu\n",
+		pr_err_ratelimited("md/raid1:%s: %pg: rescheduling sector %llu\n",
 				   mdname(conf->mddev),
-				   bdevname(rdev->bdev, b),
+				   rdev->bdev,
 				   (unsigned long long)r1_bio->sector);
 		set_bit(R1BIO_ReadError, &r1_bio->state);
 		reschedule_retry(r1_bio);
@@ -1283,10 +1282,10 @@ static void raid1_read_request(struct mddev *mddev, struct bio *bio,
 	mirror = conf->mirrors + rdisk;
 
 	if (r1bio_existed)
-		pr_info_ratelimited("md/raid1:%s: redirecting sector %llu to other mirror: %s\n",
+		pr_info_ratelimited("md/raid1:%s: redirecting sector %llu to other mirror: %pg\n",
 				    mdname(mddev),
 				    (unsigned long long)r1_bio->sector,
-				    bdevname(mirror->rdev->bdev, b));
+				    mirror->rdev->bdev);
 
 	if (test_bit(WriteMostly, &mirror->rdev->flags) &&
 	    bitmap) {
@@ -1659,7 +1658,6 @@ static void raid1_status(struct seq_file *seq, struct mddev *mddev)
  */
 static void raid1_error(struct mddev *mddev, struct md_rdev *rdev)
 {
-	char b[BDEVNAME_SIZE];
 	struct r1conf *conf = mddev->private;
 	unsigned long flags;
 
@@ -1686,9 +1684,9 @@ static void raid1_error(struct mddev *mddev, struct md_rdev *rdev)
 	set_bit(MD_RECOVERY_INTR, &mddev->recovery);
 	set_mask_bits(&mddev->sb_flags, 0,
 		      BIT(MD_SB_CHANGE_DEVS) | BIT(MD_SB_CHANGE_PENDING));
-	pr_crit("md/raid1:%s: Disk failure on %s, disabling device.\n"
+	pr_crit("md/raid1:%s: Disk failure on %pg, disabling device.\n"
 		"md/raid1:%s: Operation continuing on %d devices.\n",
-		mdname(mddev), bdevname(rdev->bdev, b),
+		mdname(mddev), rdev->bdev,
 		mdname(mddev), conf->raid_disks - mddev->degraded);
 }
 
@@ -1706,13 +1704,12 @@ static void print_conf(struct r1conf *conf)
 
 	rcu_read_lock();
 	for (i = 0; i < conf->raid_disks; i++) {
-		char b[BDEVNAME_SIZE];
 		struct md_rdev *rdev = rcu_dereference(conf->mirrors[i].rdev);
 		if (rdev)
-			pr_debug(" disk %d, wo:%d, o:%d, dev:%s\n",
+			pr_debug(" disk %d, wo:%d, o:%d, dev:%pg\n",
 				 i, !test_bit(In_sync, &rdev->flags),
 				 !test_bit(Faulty, &rdev->flags),
-				 bdevname(rdev->bdev,b));
+				 rdev->bdev);
 	}
 	rcu_read_unlock();
 }
@@ -2347,7 +2344,6 @@ static void fix_read_error(struct r1conf *conf, int read_disk,
 		}
 		d = start;
 		while (d != read_disk) {
-			char b[BDEVNAME_SIZE];
 			if (d==0)
 				d = conf->raid_disks * 2;
 			d--;
@@ -2360,11 +2356,11 @@ static void fix_read_error(struct r1conf *conf, int read_disk,
 				if (r1_sync_page_io(rdev, sect, s,
 						    conf->tmppage, READ)) {
 					atomic_add(s, &rdev->corrected_errors);
-					pr_info("md/raid1:%s: read error corrected (%d sectors at %llu on %s)\n",
+					pr_info("md/raid1:%s: read error corrected (%d sectors at %llu on %pg)\n",
 						mdname(mddev), s,
 						(unsigned long long)(sect +
 								     rdev->data_offset),
-						bdevname(rdev->bdev, b));
+						rdev->bdev);
 				}
 				rdev_dec_pending(rdev, mddev);
 			} else

drivers/md/raid10.c

@@ -397,10 +397,9 @@ static void raid10_end_read_request(struct bio *bio)
 		/*
 		 * oops, read error - keep the refcount on the rdev
 		 */
-		char b[BDEVNAME_SIZE];
-		pr_err_ratelimited("md/raid10:%s: %s: rescheduling sector %llu\n",
+		pr_err_ratelimited("md/raid10:%s: %pg: rescheduling sector %llu\n",
 				   mdname(conf->mddev),
-				   bdevname(rdev->bdev, b),
+				   rdev->bdev,
 				   (unsigned long long)r10_bio->sector);
 		set_bit(R10BIO_ReadError, &r10_bio->state);
 		reschedule_retry(r10_bio);
@@ -1187,9 +1186,9 @@ static void raid10_read_request(struct mddev *mddev, struct bio *bio,
 		return;
 	}
 	if (err_rdev)
-		pr_err_ratelimited("md/raid10:%s: %s: redirecting sector %llu to another mirror\n",
+		pr_err_ratelimited("md/raid10:%s: %pg: redirecting sector %llu to another mirror\n",
 				   mdname(mddev),
-				   bdevname(rdev->bdev, b),
+				   rdev->bdev,
 				   (unsigned long long)r10_bio->sector);
 	if (max_sectors < bio_sectors(bio)) {
 		struct bio *split = bio_split(bio, max_sectors,
@@ -1987,7 +1986,6 @@ static int enough(struct r10conf *conf, int ignore)
  */
 static void raid10_error(struct mddev *mddev, struct md_rdev *rdev)
 {
-	char b[BDEVNAME_SIZE];
 	struct r10conf *conf = mddev->private;
 	unsigned long flags;
 
@@ -2010,9 +2008,9 @@ static void raid10_error(struct mddev *mddev, struct md_rdev *rdev)
 	set_mask_bits(&mddev->sb_flags, 0,
 		      BIT(MD_SB_CHANGE_DEVS) | BIT(MD_SB_CHANGE_PENDING));
 	spin_unlock_irqrestore(&conf->device_lock, flags);
-	pr_crit("md/raid10:%s: Disk failure on %s, disabling device.\n"
+	pr_crit("md/raid10:%s: Disk failure on %pg, disabling device.\n"
 		"md/raid10:%s: Operation continuing on %d devices.\n",
-		mdname(mddev), bdevname(rdev->bdev, b),
+		mdname(mddev), rdev->bdev,
 		mdname(mddev), conf->geo.raid_disks - mddev->degraded);
 }
 
@@ -2032,13 +2030,12 @@ static void print_conf(struct r10conf *conf)
 	/* This is only called with ->reconfix_mutex held, so
 	 * rcu protection of rdev is not needed */
 	for (i = 0; i < conf->geo.raid_disks; i++) {
-		char b[BDEVNAME_SIZE];
 		rdev = conf->mirrors[i].rdev;
 		if (rdev)
-			pr_debug(" disk %d, wo:%d, o:%d, dev:%s\n",
+			pr_debug(" disk %d, wo:%d, o:%d, dev:%pg\n",
 				 i, !test_bit(In_sync, &rdev->flags),
 				 !test_bit(Faulty, &rdev->flags),
-				 bdevname(rdev->bdev,b));
+				 rdev->bdev);
 	}
 }
 
@@ -2691,14 +2688,11 @@ static void fix_read_error(struct r10conf *conf, struct mddev *mddev, struct r10
 	check_decay_read_errors(mddev, rdev);
 	atomic_inc(&rdev->read_errors);
 	if (atomic_read(&rdev->read_errors) > max_read_errors) {
-		char b[BDEVNAME_SIZE];
-		bdevname(rdev->bdev, b);
-
-		pr_notice("md/raid10:%s: %s: Raid device exceeded read_error threshold [cur %d:max %d]\n",
-			  mdname(mddev), b,
+		pr_notice("md/raid10:%s: %pg: Raid device exceeded read_error threshold [cur %d:max %d]\n",
+			  mdname(mddev), rdev->bdev,
 			  atomic_read(&rdev->read_errors), max_read_errors);
-		pr_notice("md/raid10:%s: %s: Failing raid device\n",
-			  mdname(mddev), b);
+		pr_notice("md/raid10:%s: %pg: Failing raid device\n",
+			  mdname(mddev), rdev->bdev);
 		md_error(mddev, rdev);
 		r10_bio->devs[r10_bio->read_slot].bio = IO_BLOCKED;
 		return;
@@ -2768,8 +2762,6 @@ static void fix_read_error(struct r10conf *conf, struct mddev *mddev, struct r10
 		/* write it back and re-read */
 		rcu_read_lock();
 		while (sl != r10_bio->read_slot) {
-			char b[BDEVNAME_SIZE];
-
 			if (sl==0)
 				sl = conf->copies;
 			sl--;
@@ -2788,24 +2780,22 @@ static void fix_read_error(struct r10conf *conf, struct mddev *mddev, struct r10
 					     s, conf->tmppage, WRITE)
 			    == 0) {
 				/* Well, this device is dead */
-				pr_notice("md/raid10:%s: read correction write failed (%d sectors at %llu on %s)\n",
+				pr_notice("md/raid10:%s: read correction write failed (%d sectors at %llu on %pg)\n",
 					  mdname(mddev), s,
 					  (unsigned long long)(
 						  sect +
 						  choose_data_offset(r10_bio,
 								     rdev)),
-					  bdevname(rdev->bdev, b));
-				pr_notice("md/raid10:%s: %s: failing drive\n",
+					  rdev->bdev);
+				pr_notice("md/raid10:%s: %pg: failing drive\n",
 					  mdname(mddev),
-					  bdevname(rdev->bdev, b));
+					  rdev->bdev);
 			}
 			rdev_dec_pending(rdev, mddev);
 			rcu_read_lock();
 		}
 		sl = start;
 		while (sl != r10_bio->read_slot) {
-			char b[BDEVNAME_SIZE];
-
 			if (sl==0)
 				sl = conf->copies;
 			sl--;
@@ -2825,23 +2815,23 @@ static void fix_read_error(struct r10conf *conf, struct mddev *mddev, struct r10
 						 READ)) {
 			case 0:
 				/* Well, this device is dead */
-				pr_notice("md/raid10:%s: unable to read back corrected sectors (%d sectors at %llu on %s)\n",
+				pr_notice("md/raid10:%s: unable to read back corrected sectors (%d sectors at %llu on %pg)\n",
 				       mdname(mddev), s,
 				       (unsigned long long)(
 					       sect +
 					       choose_data_offset(r10_bio, rdev)),
-				       bdevname(rdev->bdev, b));
-				pr_notice("md/raid10:%s: %s: failing drive\n",
+				       rdev->bdev);
+				pr_notice("md/raid10:%s: %pg: failing drive\n",
 				       mdname(mddev),
-				       bdevname(rdev->bdev, b));
+				       rdev->bdev);
 				break;
 			case 1:
-				pr_info("md/raid10:%s: read error corrected (%d sectors at %llu on %s)\n",
+				pr_info("md/raid10:%s: read error corrected (%d sectors at %llu on %pg)\n",
 				       mdname(mddev), s,
 				       (unsigned long long)(
 					       sect +
 					       choose_data_offset(r10_bio, rdev)),
-				       bdevname(rdev->bdev, b));
+				       rdev->bdev);
 				atomic_add(s, &rdev->corrected_errors);
 			}
 

drivers/md/raid5-cache.c

@@ -3064,11 +3064,10 @@ int r5l_init_log(struct r5conf *conf, struct md_rdev *rdev)
 {
 	struct request_queue *q = bdev_get_queue(rdev->bdev);
 	struct r5l_log *log;
-	char b[BDEVNAME_SIZE];
 	int ret;
 
-	pr_debug("md/raid:%s: using device %s as journal\n",
-		 mdname(conf->mddev), bdevname(rdev->bdev, b));
+	pr_debug("md/raid:%s: using device %pg as journal\n",
+		 mdname(conf->mddev), rdev->bdev);
 
 	if (PAGE_SIZE != 4096)
 		return -EINVAL;

drivers/md/raid5-ppl.c

@@ -798,7 +798,6 @@ static int ppl_recover_entry(struct ppl_log *log, struct ppl_header_entry *e,
 	int data_disks;
 	int i;
 	int ret = 0;
-	char b[BDEVNAME_SIZE];
 	unsigned int pp_size = le32_to_cpu(e->pp_size);
 	unsigned int data_size = le32_to_cpu(e->data_size);
 
@@ -894,8 +893,8 @@ static int ppl_recover_entry(struct ppl_log *log, struct ppl_header_entry *e,
 				break;
 			}
 
-			pr_debug("%s:%*s reading data member disk %s sector %llu\n",
-				 __func__, indent, "", bdevname(rdev->bdev, b),
+			pr_debug("%s:%*s reading data member disk %pg sector %llu\n",
+				 __func__, indent, "", rdev->bdev,
 				 (unsigned long long)sector);
 			if (!sync_page_io(rdev, sector, block_size, page2,
 					REQ_OP_READ, 0, false)) {
@@ -942,10 +941,10 @@ static int ppl_recover_entry(struct ppl_log *log, struct ppl_header_entry *e,
 					conf->disks[sh.pd_idx].rdev, 1);
 
 		BUG_ON(parity_rdev->bdev->bd_dev != log->rdev->bdev->bd_dev);
-		pr_debug("%s:%*s write parity at sector %llu, disk %s\n",
+		pr_debug("%s:%*s write parity at sector %llu, disk %pg\n",
 			 __func__, indent, "",
 			 (unsigned long long)parity_sector,
-			 bdevname(parity_rdev->bdev, b));
+			 parity_rdev->bdev);
 		if (!sync_page_io(parity_rdev, parity_sector, block_size,
 				page1, REQ_OP_WRITE, 0, false)) {
 			pr_debug("%s:%*s parity write error!\n", __func__,
@@ -1255,7 +1254,6 @@ void ppl_exit_log(struct r5conf *conf)
 
 static int ppl_validate_rdev(struct md_rdev *rdev)
 {
-	char b[BDEVNAME_SIZE];
 	int ppl_data_sectors;
 	int ppl_size_new;
 
@@ -1272,8 +1270,8 @@ static int ppl_validate_rdev(struct md_rdev *rdev)
 				RAID5_STRIPE_SECTORS((struct r5conf *)rdev->mddev->private));
 
 	if (ppl_data_sectors <= 0) {
-		pr_warn("md/raid:%s: PPL space too small on %s\n",
-			mdname(rdev->mddev), bdevname(rdev->bdev, b));
+		pr_warn("md/raid:%s: PPL space too small on %pg\n",
+			mdname(rdev->mddev), rdev->bdev);
 		return -ENOSPC;
 	}
 
@@ -1283,16 +1281,16 @@ static int ppl_validate_rdev(struct md_rdev *rdev)
 	     rdev->ppl.sector + ppl_size_new > rdev->data_offset) ||
 	    (rdev->ppl.sector >= rdev->data_offset &&
 	     rdev->data_offset + rdev->sectors > rdev->ppl.sector)) {
-		pr_warn("md/raid:%s: PPL space overlaps with data on %s\n",
-			mdname(rdev->mddev), bdevname(rdev->bdev, b));
+		pr_warn("md/raid:%s: PPL space overlaps with data on %pg\n",
+			mdname(rdev->mddev), rdev->bdev);
 		return -EINVAL;
 	}
 
 	if (!rdev->mddev->external &&
 	    ((rdev->ppl.offset > 0 && rdev->ppl.offset < (rdev->sb_size >> 9)) ||
 	     (rdev->ppl.offset <= 0 && rdev->ppl.offset + ppl_size_new > 0))) {
-		pr_warn("md/raid:%s: PPL space overlaps with superblock on %s\n",
-			mdname(rdev->mddev), bdevname(rdev->bdev, b));
+		pr_warn("md/raid:%s: PPL space overlaps with superblock on %pg\n",
+			mdname(rdev->mddev), rdev->bdev);
 		return -EINVAL;
 	}
 
@@ -1463,14 +1461,13 @@ int ppl_modify_log(struct r5conf *conf, struct md_rdev *rdev, bool add)
 	struct ppl_conf *ppl_conf = conf->log_private;
 	struct ppl_log *log;
 	int ret = 0;
-	char b[BDEVNAME_SIZE];
 
 	if (!rdev)
 		return -EINVAL;
 
-	pr_debug("%s: disk: %d operation: %s dev: %s\n",
+	pr_debug("%s: disk: %d operation: %s dev: %pg\n",
 		 __func__, rdev->raid_disk, add ? "add" : "remove",
-		 bdevname(rdev->bdev, b));
+		 rdev->bdev);
 
 	if (rdev->raid_disk < 0)
 		return 0;

drivers/md/raid5.c

@@ -2686,7 +2686,6 @@ static void raid5_end_read_request(struct bio * bi)
 	struct stripe_head *sh = bi->bi_private;
 	struct r5conf *conf = sh->raid_conf;
 	int disks = sh->disks, i;
-	char b[BDEVNAME_SIZE];
 	struct md_rdev *rdev = NULL;
 	sector_t s;
 
@@ -2723,10 +2722,10 @@ static void raid5_end_read_request(struct bio * bi)
 			 * any error
 			 */
 			pr_info_ratelimited(
-				"md/raid:%s: read error corrected (%lu sectors at %llu on %s)\n",
+				"md/raid:%s: read error corrected (%lu sectors at %llu on %pg)\n",
 				mdname(conf->mddev), RAID5_STRIPE_SECTORS(conf),
 				(unsigned long long)s,
-				bdevname(rdev->bdev, b));
+				rdev->bdev);
 			atomic_add(RAID5_STRIPE_SECTORS(conf), &rdev->corrected_errors);
 			clear_bit(R5_ReadError, &sh->dev[i].flags);
 			clear_bit(R5_ReWrite, &sh->dev[i].flags);
@@ -2743,7 +2742,6 @@ static void raid5_end_read_request(struct bio * bi)
 		if (atomic_read(&rdev->read_errors))
 			atomic_set(&rdev->read_errors, 0);
 	} else {
-		const char *bdn = bdevname(rdev->bdev, b);
 		int retry = 0;
 		int set_bad = 0;
 
@@ -2752,25 +2750,25 @@ static void raid5_end_read_request(struct bio * bi)
 			atomic_inc(&rdev->read_errors);
 		if (test_bit(R5_ReadRepl, &sh->dev[i].flags))
 			pr_warn_ratelimited(
-				"md/raid:%s: read error on replacement device (sector %llu on %s).\n",
+				"md/raid:%s: read error on replacement device (sector %llu on %pg).\n",
 				mdname(conf->mddev),
 				(unsigned long long)s,
-				bdn);
+				rdev->bdev);
 		else if (conf->mddev->degraded >= conf->max_degraded) {
 			set_bad = 1;
 			pr_warn_ratelimited(
-				"md/raid:%s: read error not correctable (sector %llu on %s).\n",
+				"md/raid:%s: read error not correctable (sector %llu on %pg).\n",
 				mdname(conf->mddev),
 				(unsigned long long)s,
-				bdn);
+				rdev->bdev);
 		} else if (test_bit(R5_ReWrite, &sh->dev[i].flags)) {
 			/* Oh, no!!! */
 			set_bad = 1;
 			pr_warn_ratelimited(
-				"md/raid:%s: read error NOT corrected!! (sector %llu on %s).\n",
+				"md/raid:%s: read error NOT corrected!! (sector %llu on %pg).\n",
 				mdname(conf->mddev),
 				(unsigned long long)s,
-				bdn);
+				rdev->bdev);
 		} else if (atomic_read(&rdev->read_errors)
 			 > conf->max_nr_stripes) {
 			if (!test_bit(Faulty, &rdev->flags)) {
@@ -2778,8 +2776,8 @@ static void raid5_end_read_request(struct bio * bi)
 				    mdname(conf->mddev),
 				    atomic_read(&rdev->read_errors),
 				    conf->max_nr_stripes);
-				pr_warn("md/raid:%s: Too many read errors, failing device %s.\n",
-				    mdname(conf->mddev), bdn);
+				pr_warn("md/raid:%s: Too many read errors, failing device %pg.\n",
+				    mdname(conf->mddev), rdev->bdev);
 			}
 		} else
 			retry = 1;
@@ -2891,13 +2889,12 @@ static void raid5_end_write_request(struct bio *bi)
 
 static void raid5_error(struct mddev *mddev, struct md_rdev *rdev)
 {
-	char b[BDEVNAME_SIZE];
 	struct r5conf *conf = mddev->private;
 	unsigned long flags;
 	pr_debug("raid456: error called\n");
 
-	pr_crit("md/raid:%s: Disk failure on %s, disabling device.\n",
-		mdname(mddev), bdevname(rdev->bdev, b));
+	pr_crit("md/raid:%s: Disk failure on %pg, disabling device.\n",
+		mdname(mddev), rdev->bdev);
 
 	spin_lock_irqsave(&conf->device_lock, flags);
 	set_bit(Faulty, &rdev->flags);
@@ -7359,9 +7356,8 @@ static struct r5conf *setup_conf(struct mddev *mddev)
 		}
 
 		if (test_bit(In_sync, &rdev->flags)) {
-			char b[BDEVNAME_SIZE];
-			pr_info("md/raid:%s: device %s operational as raid disk %d\n",
-				mdname(mddev), bdevname(rdev->bdev, b), raid_disk);
+			pr_info("md/raid:%s: device %pg operational as raid disk %d\n",
+				mdname(mddev), rdev->bdev, raid_disk);
 		} else if (rdev->saved_raid_disk != raid_disk)
 			/* Cannot rely on bitmap to complete recovery */
 			conf->fullsync = 1;
@@ -7877,12 +7873,11 @@ static void print_raid5_conf (struct r5conf *conf)
 
 	rcu_read_lock();
 	for (i = 0; i < conf->raid_disks; i++) {
-		char b[BDEVNAME_SIZE];
 		rdev = rcu_dereference(conf->disks[i].rdev);
 		if (rdev)
-			pr_debug(" disk %d, o:%d, dev:%s\n",
+			pr_debug(" disk %d, o:%d, dev:%pg\n",
 			       i, !test_bit(Faulty, &rdev->flags),
-			       bdevname(rdev->bdev, b));
+			       rdev->bdev);
 	}
 	rcu_read_unlock();
 }