From e63a46bef01ff3064f44dba145833284fb6adeec Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Wed, 15 Jun 2016 18:17:27 -0700 Subject: block: introduce device_add_disk() 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 Reviewed-by: Johannes Thumshirn Reviewed-by: Bart Van Assche Signed-off-by: Dan Williams --- block/genhd.c | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-) (limited to 'block/genhd.c') diff --git a/block/genhd.c b/block/genhd.c index 9f42526b4d62..fb2d9aeb75a5 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -506,7 +506,7 @@ static int exact_lock(dev_t devt, void *data) return 0; } -static void register_disk(struct gendisk *disk) +static void register_disk(struct device *parent, struct gendisk *disk) { struct device *ddev = disk_to_dev(disk); struct block_device *bdev; @@ -514,7 +514,7 @@ static void register_disk(struct gendisk *disk) struct hd_struct *part; int err; - ddev->parent = disk->driverfs_dev; + ddev->parent = parent; dev_set_name(ddev, "%s", disk->disk_name); @@ -573,7 +573,8 @@ exit: } /** - * add_disk - add partitioning information to kernel list + * device_add_disk - add partitioning information to kernel list + * @parent: parent device for the disk * @disk: per-device partitioning information * * This function registers the partitioning information in @disk @@ -581,7 +582,7 @@ exit: * * FIXME: error handling */ -void add_disk(struct gendisk *disk) +void device_add_disk(struct device *parent, struct gendisk *disk) { struct backing_dev_info *bdi; dev_t devt; @@ -617,7 +618,11 @@ void add_disk(struct gendisk *disk) blk_register_region(disk_devt(disk), disk->minors, NULL, exact_match, exact_lock, disk); - register_disk(disk); + + /* temporary while we convert usages to use disk_to_dev(disk)->parent */ + disk->driverfs_dev = parent; + + register_disk(parent, disk); blk_register_queue(disk); /* @@ -633,7 +638,7 @@ void add_disk(struct gendisk *disk) disk_add_events(disk); blk_integrity_add(disk); } -EXPORT_SYMBOL(add_disk); +EXPORT_SYMBOL(device_add_disk); void del_gendisk(struct gendisk *disk) { -- cgit v1.2.3 From 52c44d93c26f5a76068c0a8cc83bb8f56f38043d Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Wed, 15 Jun 2016 19:43:07 -0700 Subject: block: remove ->driverfs_dev Now that all drivers that specify a ->driverfs_dev have been converted to device_add_disk(), the pointer can be removed from struct gendisk. Cc: Jens Axboe Cc: Ross Zwisler Reviewed-by: Christoph Hellwig Reviewed-by: Johannes Thumshirn Signed-off-by: Dan Williams --- block/genhd.c | 9 ++------- drivers/nvdimm/bus.c | 2 +- include/linux/genhd.h | 4 +--- 3 files changed, 4 insertions(+), 11 deletions(-) (limited to 'block/genhd.c') diff --git a/block/genhd.c b/block/genhd.c index fb2d9aeb75a5..a18d35390f1d 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -618,10 +618,6 @@ void device_add_disk(struct device *parent, struct gendisk *disk) blk_register_region(disk_devt(disk), disk->minors, NULL, exact_match, exact_lock, disk); - - /* temporary while we convert usages to use disk_to_dev(disk)->parent */ - disk->driverfs_dev = parent; - register_disk(parent, disk); blk_register_queue(disk); @@ -804,10 +800,9 @@ void __init printk_all_partitions(void) , disk_name(disk, part->partno, name_buf), part->info ? part->info->uuid : ""); if (is_part0) { - if (disk->driverfs_dev != NULL && - disk->driverfs_dev->driver != NULL) + if (dev->parent && dev->parent->driver) printk(" driver: %s\n", - disk->driverfs_dev->driver->name); + dev->parent->driver->name); else printk(" (driver?)\n"); } else diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c index f085f8bceae8..5e4e5c772ea5 100644 --- a/drivers/nvdimm/bus.c +++ b/drivers/nvdimm/bus.c @@ -312,7 +312,7 @@ EXPORT_SYMBOL(__nd_driver_register); int nvdimm_revalidate_disk(struct gendisk *disk) { - struct device *dev = disk->driverfs_dev; + struct device *dev = disk_to_dev(disk)->parent; struct nd_region *nd_region = to_nd_region(dev->parent); const char *pol = nd_region->ro ? "only" : "write"; diff --git a/include/linux/genhd.h b/include/linux/genhd.h index df1dabbfd388..1dbf52f9c24b 100644 --- a/include/linux/genhd.h +++ b/include/linux/genhd.h @@ -205,7 +205,6 @@ struct gendisk { void *private_data; int flags; - struct device *driverfs_dev; // FIXME: remove struct kobject *slave_dir; struct timer_rand_state *random; @@ -417,8 +416,7 @@ extern void part_round_stats(int cpu, struct hd_struct *part); 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); + device_add_disk(NULL, disk); } extern void del_gendisk(struct gendisk *gp); -- cgit v1.2.3