block: implement and use {disk|part}_to_dev()
Implement {disk|part}_to_dev() and use them to access generic device
instead of directly dereferencing {disk|part}->dev. To make sure no
user is left behind, rename generic devices fields to __dev.
This is in preparation of unifying partition 0 handling with other
partitions.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/block/genhd.c b/block/genhd.c
index 67e5a59..0a2f16b 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -59,7 +59,7 @@
rcu_read_lock();
part = rcu_dereference(disk->__part[partno - 1]);
if (part)
- get_device(&part->dev);
+ get_device(part_to_dev(part));
rcu_read_unlock();
return part;
@@ -130,7 +130,7 @@
if (!(piter->flags & DISK_PITER_INCL_EMPTY) && !part->nr_sects)
continue;
- get_device(&part->dev);
+ get_device(part_to_dev(part));
piter->part = part;
piter->idx += inc;
break;
@@ -435,7 +435,7 @@
{
struct gendisk *p = data;
- return &p->dev.kobj;
+ return &disk_to_dev(p)->kobj;
}
static int exact_lock(dev_t devt, void *data)
@@ -460,7 +460,7 @@
int retval;
disk->flags |= GENHD_FL_UP;
- disk->dev.devt = MKDEV(disk->major, disk->first_minor);
+ disk_to_dev(disk)->devt = MKDEV(disk->major, disk->first_minor);
blk_register_region(disk_devt(disk), disk->minors, NULL,
exact_match, exact_lock, disk);
register_disk(disk);
@@ -468,7 +468,8 @@
bdi = &disk->queue->backing_dev_info;
bdi_register_dev(bdi, disk_devt(disk));
- retval = sysfs_create_link(&disk->dev.kobj, &bdi->dev->kobj, "bdi");
+ retval = sysfs_create_link(&disk_to_dev(disk)->kobj, &bdi->dev->kobj,
+ "bdi");
WARN_ON(retval);
}
@@ -477,7 +478,7 @@
void unlink_gendisk(struct gendisk *disk)
{
- sysfs_remove_link(&disk->dev.kobj, "bdi");
+ sysfs_remove_link(&disk_to_dev(disk)->kobj, "bdi");
bdi_unregister(&disk->queue->backing_dev_info);
blk_unregister_queue(disk);
blk_unregister_region(disk_devt(disk), disk->minors);
@@ -903,7 +904,7 @@
int cpu;
/*
- if (&gp->dev.kobj.entry == block_class.devices.next)
+ if (&disk_to_dev(gp)->kobj.entry == block_class.devices.next)
seq_puts(seqf, "major minor name"
" rio rmerge rsect ruse wio wmerge "
"wsect wuse running use aveq"
@@ -972,7 +973,7 @@
* set enviroment vars to indicate which event this is for
* so that user space will know to go check the media status.
*/
- kobject_uevent_env(&gd->dev.kobj, KOBJ_CHANGE, envp);
+ kobject_uevent_env(&disk_to_dev(gd)->kobj, KOBJ_CHANGE, envp);
put_device(gd->driverfs_dev);
}
@@ -1062,9 +1063,9 @@
disk->minors = minors;
disk->ext_minors = ext_minors;
rand_initialize_disk(disk);
- disk->dev.class = &block_class;
- disk->dev.type = &disk_type;
- device_initialize(&disk->dev);
+ disk_to_dev(disk)->class = &block_class;
+ disk_to_dev(disk)->type = &disk_type;
+ device_initialize(disk_to_dev(disk));
INIT_WORK(&disk->async_notify,
media_change_notify_thread);
}
@@ -1086,7 +1087,7 @@
owner = disk->fops->owner;
if (owner && !try_module_get(owner))
return NULL;
- kobj = kobject_get(&disk->dev.kobj);
+ kobj = kobject_get(&disk_to_dev(disk)->kobj);
if (kobj == NULL) {
module_put(owner);
return NULL;
@@ -1100,7 +1101,7 @@
void put_disk(struct gendisk *disk)
{
if (disk)
- kobject_put(&disk->dev.kobj);
+ kobject_put(&disk_to_dev(disk)->kobj);
}
EXPORT_SYMBOL(put_disk);