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authorChristoph Hellwig <hch@lst.de>2020-11-27 18:43:51 +0300
committerJens Axboe <axboe@kernel.dk>2020-12-02 00:53:40 +0300
commit0d02129e76edf91cf04fabf1efbc3a9a1f1d729a (patch)
tree20fd7e1e54d4430038eb74d8e276decee65ee7c3 /init
parent9499ffc7521742e3fea32f6ac6c1213b6fc4e914 (diff)
downloadlinux-0d02129e76edf91cf04fabf1efbc3a9a1f1d729a.tar.xz
block: merge struct block_device and struct hd_struct
Instead of having two structures that represent each block device with different life time rules, merge them into a single one. This also greatly simplifies the reference counting rules, as we can use the inode reference count as the main reference count for the new struct block_device, with the device model reference front ending it for device model interaction. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Jan Kara <jack@suse.cz> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'init')
-rw-r--r--init/do_mounts.c21
1 files changed, 10 insertions, 11 deletions
diff --git a/init/do_mounts.c b/init/do_mounts.c
index 86bef93e72eb..a78e44ee6adb 100644
--- a/init/do_mounts.c
+++ b/init/do_mounts.c
@@ -76,11 +76,11 @@ struct uuidcmp {
*/
static int match_dev_by_uuid(struct device *dev, const void *data)
{
+ struct block_device *bdev = dev_to_bdev(dev);
const struct uuidcmp *cmp = data;
- struct hd_struct *part = dev_to_part(dev);
- if (!part->bdev->bd_meta_info ||
- strncasecmp(cmp->uuid, part->bdev->bd_meta_info->uuid, cmp->len))
+ if (!bdev->bd_meta_info ||
+ strncasecmp(cmp->uuid, bdev->bd_meta_info->uuid, cmp->len))
return 0;
return 1;
}
@@ -133,13 +133,13 @@ static dev_t devt_from_partuuid(const char *uuid_str)
* Attempt to find the requested partition by adding an offset
* to the partition number found by UUID.
*/
- struct hd_struct *part;
+ struct block_device *part;
- part = disk_get_part(dev_to_disk(dev),
- dev_to_part(dev)->bdev->bd_partno + offset);
+ part = bdget_disk(dev_to_disk(dev),
+ dev_to_bdev(dev)->bd_partno + offset);
if (part) {
- devt = part_devt(part);
- put_device(part_to_dev(part));
+ devt = part->bd_dev;
+ bdput(part);
}
} else {
devt = dev->devt;
@@ -166,11 +166,10 @@ clear_root_wait:
*/
static int match_dev_by_label(struct device *dev, const void *data)
{
+ struct block_device *bdev = dev_to_bdev(dev);
const char *label = data;
- struct hd_struct *part = dev_to_part(dev);
- if (!part->bdev->bd_meta_info ||
- strcmp(label, part->bdev->bd_meta_info->volname))
+ if (!bdev->bd_meta_info || strcmp(label, bdev->bd_meta_info->volname))
return 0;
return 1;
}