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block: simplify show_partition 

Just use xa_for_each to iterate over the partitions as there is no need
to grab a reference to each partition.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20210406062303.811835-10-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2021-04-06 08:23:00 +02:00 committed by Jens Axboe
parent e559f58d20
commit ecc75a98b8
1 changed files with 7 additions and 6 deletions
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13
block/genhd.c
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@ -907,8 +907,8 @@ static void *show_partition_start(struct seq_file *seqf, loff_t *pos)
static int show_partition(struct seq_file *seqf, void *v)
{
struct gendisk *sgp = v;
struct disk_part_iter piter;
struct block_device *part;
unsigned long idx;
char buf[BDEVNAME_SIZE];
/* Don't show non-partitionable removeable devices or empty devices */
@ -918,15 +918,16 @@ static int show_partition(struct seq_file *seqf, void *v)
if (sgp->flags & GENHD_FL_SUPPRESS_PARTITION_INFO)
return 0;
/* show the full disk and all non-0 size partitions of it */
disk_part_iter_init(&piter, sgp, DISK_PITER_INCL_PART0);
while ((part = disk_part_iter_next(&piter)))
rcu_read_lock();
xa_for_each(&sgp->part_tbl, idx, part) {
if (!bdev_nr_sectors(part))
continue;
seq_printf(seqf, "%4d %7d %10llu %s\n",
MAJOR(part->bd_dev), MINOR(part->bd_dev),
bdev_nr_sectors(part) >> 1,
disk_name(sgp, part->bd_partno, buf));
disk_part_iter_exit(&piter);
}
rcu_read_unlock();
return 0;
}