@@ -1470,3 +1470,16 @@ void inc_diskseq(struct gendisk *disk)
{
disk->diskseq = atomic64_inc_return(&diskseq);
}
+
+void init_disk(struct gendisk *disk, int major, int first_minor,
+ int minors, sector_t sectors, void *private_data,
+ const struct block_device_operations *fops)
+{
+ disk->major = major;
+ disk->first_minor = first_minor;
+ disk->minors = minors;
+ set_capacity(disk, sectors);
+ disk->private_data = private_data;
+ disk->fops = fops;
+}
+EXPORT_SYMBOL_GPL(init_disk);
@@ -1871,18 +1871,14 @@ static int init_driver_queues(struct nullb *nullb)
static int null_gendisk_register(struct nullb *nullb)
{
sector_t size = ((sector_t)nullb->dev->size * SZ_1M) >> SECTOR_SHIFT;
+ const struct block_device_operations *fops;
struct gendisk *disk = nullb->disk;
- set_capacity(disk, size);
-
- disk->major = null_major;
- disk->first_minor = nullb->index;
- disk->minors = 1;
if (queue_is_mq(nullb->q))
- disk->fops = &null_rq_ops;
+ fops = &null_rq_ops;
else
- disk->fops = &null_bio_ops;
- disk->private_data = nullb;
+ fops = &null_bio_ops;
+ init_disk(disk, null_major, nullb->index, 1, size, nullb, fops);
strncpy(disk->disk_name, nullb->disk_name, DISK_NAME_LEN);
if (nullb->dev->zoned) {
@@ -757,6 +757,11 @@ static inline int __must_check add_disk(struct gendisk *disk)
{
return device_add_disk(NULL, disk, NULL);
}
+
+void init_disk(struct gendisk *disk, int major, int first_minor,
+ int minors, sector_t sectors, void *private_data,
+ const struct block_device_operations *fops);
+
void del_gendisk(struct gendisk *gp);
void invalidate_disk(struct gendisk *disk);
void set_disk_ro(struct gendisk *disk, bool read_only);
Add and use the helper to initialize the common fields of struct gendisk such as major, first_minor, minors, disk_name, private_data, and ops. This initialization is spread all over the block drivers. This avoids code repetation of inialization code of gendisk in current block drivers and any future ones. Signed-off-by: Chaitanya Kulkarni <kch@nvidia.com> --- block/genhd.c | 13 +++++++++++++ drivers/block/null_blk/main.c | 12 ++++-------- include/linux/blkdev.h | 5 +++++ 3 files changed, 22 insertions(+), 8 deletions(-)