[dm-devel] [PATCH 40/45] block: pass a block_device to blk_alloc_devt

[Christoph Hellwig <hch@lst.de>]

Pass the block_device actually needed instead of the hd_struct.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
---
 block/blk.h             |  2 +-
 block/genhd.c           | 14 +++++++-------
 block/partitions/core.c |  2 +-
 3 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/block/blk.h b/block/blk.h
index d5bf8f3a078186..9657c6da7c770c 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -350,7 +350,7 @@ static inline void blk_queue_free_zone_bitmaps(struct request_queue *q) {}
 
 struct block_device *disk_map_sector_rcu(struct gendisk *disk, sector_t sector);
 
-int blk_alloc_devt(struct hd_struct *part, dev_t *devt);
+int blk_alloc_devt(struct block_device *part, dev_t *devt);
 void blk_free_devt(dev_t devt);
 char *disk_name(struct gendisk *hd, int partno, char *buf);
 #define ADDPART_FLAG_NONE	0
diff --git a/block/genhd.c b/block/genhd.c
index f4e5a892fc8208..835393b7101ace 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -562,8 +562,8 @@ static int blk_mangle_minor(int minor)
 }
 
 /**
- * blk_alloc_devt - allocate a dev_t for a partition
- * @part: partition to allocate dev_t for
+ * blk_alloc_devt - allocate a dev_t for a block device
+ * @bdev: block device to allocate dev_t for
  * @devt: out parameter for resulting dev_t
  *
  * Allocate a dev_t for block device.
@@ -575,14 +575,14 @@ static int blk_mangle_minor(int minor)
  * CONTEXT:
  * Might sleep.
  */
-int blk_alloc_devt(struct hd_struct *part, dev_t *devt)
+int blk_alloc_devt(struct block_device *bdev, dev_t *devt)
 {
-	struct gendisk *disk = part_to_disk(part);
+	struct gendisk *disk = bdev->bd_disk;
 	int idx;
 
 	/* in consecutive minor range? */
-	if (part->bdev->bd_partno < disk->minors) {
-		*devt = MKDEV(disk->major, disk->first_minor + part->bdev->bd_partno);
+	if (bdev->bd_partno < disk->minors) {
+		*devt = MKDEV(disk->major, disk->first_minor + bdev->bd_partno);
 		return 0;
 	}
 
@@ -738,7 +738,7 @@ static void __device_add_disk(struct device *parent, struct gendisk *disk,
 
 	disk->flags |= GENHD_FL_UP;
 
-	retval = blk_alloc_devt(disk->part0->bd_part, &devt);
+	retval = blk_alloc_devt(disk->part0, &devt);
 	if (retval) {
 		WARN_ON(1);
 		return;
diff --git a/block/partitions/core.c b/block/partitions/core.c
index 6db9ca8b722d66..3d8243334c7cb4 100644
--- a/block/partitions/core.c
+++ b/block/partitions/core.c
@@ -392,7 +392,7 @@ static struct hd_struct *add_partition(struct gendisk *disk, int partno,
 	pdev->type = &part_type;
 	pdev->parent = ddev;
 
-	err = blk_alloc_devt(p, &devt);
+	err = blk_alloc_devt(bdev, &devt);
 	if (err)
 		goto out_bdput;
 	pdev->devt = devt;
-- 
2.29.2

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