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block: introduce device_add_disk()

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In preparation for removing the ->driverfs_dev member of a gendisk, add
an api that takes the parent device as a parameter to add_disk().  For
now this maintains the status quo of WARN()ing on failure, but not
return a error code.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams
2016-06-15 18:17:27 -07:00
parent 1b57e66384
commit e63a46bef0
2 changed files with 18 additions and 7 deletions
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8
include/linux/genhd.h
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@@ -414,7 +414,13 @@ static inline void free_part_info(struct hd_struct *part)
extern void part_round_stats(int cpu, struct hd_struct *part);
/* block/genhd.c */
extern void add_disk(struct gendisk *disk);
extern void device_add_disk(struct device *parent, struct gendisk *disk);
static inline void add_disk(struct gendisk *disk)
{
/* temporary while we convert callers to device_add_disk */
device_add_disk(disk->driverfs_dev, disk);
}
extern void del_gendisk(struct gendisk *gp);
extern struct gendisk *get_gendisk(dev_t dev, int *partno);
extern struct block_device *bdget_disk(struct gendisk *disk, int partno);