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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 05 Oct 2022 05:00:59.5620 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 47961f58-4358-45fe-167a-08daa68e9853 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.161];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: DM6NAM11FT100.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR12MB5405 X-Spam-Status: No, score=-1.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FORGED_SPF_HELO, RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_NONE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- block/genhd.c | 13 +++++++++++++ drivers/block/null_blk/main.c | 12 ++++-------- include/linux/blkdev.h | 5 +++++ 3 files changed, 22 insertions(+), 8 deletions(-) diff --git a/block/genhd.c b/block/genhd.c index 514395361d7c..701309a7388e 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -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); diff --git a/drivers/block/null_blk/main.c b/drivers/block/null_blk/main.c index 1f154f92f4c2..d31085c94fd3 100644 --- a/drivers/block/null_blk/main.c +++ b/drivers/block/null_blk/main.c @@ -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) { diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 49373d002631..cb9db857f890 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -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); -- 2.29.0