block: use the %pg format specifier in show_partition

Simplify printing the partition name by using the %pg format specifier
that is equivalent to a bdevname call.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20210727062518.122108-4-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/block/genhd.c b/block/genhd.c
index 770f21b..6ed58fd 100644 (file)
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -778,7 +778,6 @@ static int show_partition(struct seq_file *seqf, void *v)
        struct gendisk *sgp = v;
        struct block_device *part;
        unsigned long idx;
-       char buf[BDEVNAME_SIZE];
 
        /* Don't show non-partitionable removeable devices or empty devices */
        if (!get_capacity(sgp) || (!disk_max_parts(sgp) &&
@@ -791,10 +790,9 @@ static int show_partition(struct seq_file *seqf, void *v)
        xa_for_each(&sgp->part_tbl, idx, part) {
                if (!bdev_nr_sectors(part))
                        continue;
-               seq_printf(seqf, "%4d  %7d %10llu %s\n",
+               seq_printf(seqf, "%4d  %7d %10llu %pg\n",
                           MAJOR(part->bd_dev), MINOR(part->bd_dev),
-                          bdev_nr_sectors(part) >> 1,
-                          disk_name(sgp, part->bd_partno, buf));
+                          bdev_nr_sectors(part) >> 1, part);
        }
        rcu_read_unlock();
        return 0;