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Revert "block: remove devnode callback from struct block_device_operations"

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This reverts commit 85d6ce58e4.

We're reinstating the pktcdvd driver, which needs this API.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2023-01-04 14:44:02 -07:00
parent ee4b4e2248
commit 050a4f341f
2 changed files with 12 additions and 0 deletions
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11
block/genhd.c
View File

@ -1201,10 +1201,21 @@ struct class block_class = {
.dev_uevent = block_uevent,
};
static char *block_devnode(struct device *dev, umode_t *mode,
kuid_t *uid, kgid_t *gid)
{
struct gendisk *disk = dev_to_disk(dev);
if (disk->fops->devnode)
return disk->fops->devnode(disk, mode);
return NULL;
}
const struct device_type disk_type = {
.name = "disk",
.groups = disk_attr_groups,
.release = disk_release,
.devnode = block_devnode,
};
#ifdef CONFIG_PROC_FS

1
include/linux/blkdev.h
View File

@ -1395,6 +1395,7 @@ struct block_device_operations {
void (*swap_slot_free_notify) (struct block_device *, unsigned long);
int (*report_zones)(struct gendisk *, sector_t sector,
unsigned int nr_zones, report_zones_cb cb, void *data);
char *(*devnode)(struct gendisk *disk, umode_t *mode);
/* returns the length of the identifier or a negative errno: */
int (*get_unique_id)(struct gendisk *disk, u8 id[16],
enum blk_unique_id id_type);