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[30/30] z2ram: use blk_mq_alloc_disk and blk_cleanup_disk

Message ID 20210602065345.355274-31-hch@lst.de
State New
Headers show
Series [01/30] blk-mq: factor out a blk_mq_alloc_sq_tag_set helper | expand

Commit Message

Christoph Hellwig June 2, 2021, 6:53 a.m. UTC 
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(-)
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Patch

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);