[PATCH 30/30] z2ram: use blk_mq_alloc_disk and blk_cleanup_disk

Christoph Hellwig
2021-06-02T06:56:55Z

Use blk_mq_alloc_disk and blk_cleanup_disk to simplify the gendisk and
request_queue allocation.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/block/z2ram.c | 15 ++++-----------
1 file changed, 4 insertions(+), 11 deletions(-)

diff --git a/drivers/block/z2ram.c b/drivers/block/z2ram.c
index c1d20818e649..a8968d9e759b 100644
--- a/drivers/block/z2ram.c
+++ b/drivers/block/z2ram.c
@@ -323,27 +323,20 @@ static const struct blk_mq_ops z2_mq_ops = {

static int z2ram_register_disk(int minor)
{
- struct request_queue *q;
struct gendisk *disk;

- disk = alloc_disk(1);
- if (!disk)
- return -ENOMEM;
-
- q = blk_mq_init_queue(&tag_set);
- if (IS_ERR(q)) {
- put_disk(disk);
- return PTR_ERR(q);
- }
+ disk = blk_mq_alloc_disk(&tag_set, NULL);
+ if (IS_ERR(disk))
+ return PTR_ERR(disk);

disk->major = Z2RAM_MAJOR;
disk->first_minor = minor;
+ disk->minors = 1;
disk->fops = &z2_fops;
if (minor)
sprintf(disk->disk_name, "z2ram%d", minor);
else
sprintf(disk->disk_name, "z2ram");
- disk->queue = q;

z2ram_gendisk[minor] = disk;
add_disk(disk);
--
2.30.2