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block: implement and use {disk|part}_to_dev()

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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>
This commit is contained in:
Tejun Heo
2008-08-25 19:56:05 +09:00
committed by Jens Axboe
parent 870d665612
commit ed9e198234
11 changed files with 86 additions and 77 deletions
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drivers/block/nbd.c
+2 -2
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@@ -403,7 +403,7 @@ static int nbd_do_it(struct nbd_device *lo)
BUG_ON(lo->magic != LO_MAGIC);
lo->pid = current->pid;
ret = sysfs_create_file(&lo->disk->dev.kobj, &pid_attr.attr);
ret = sysfs_create_file(&disk_to_dev(lo->disk)->kobj, &pid_attr.attr);
if (ret) {
printk(KERN_ERR "nbd: sysfs_create_file failed!");
return ret;
@@ -412,7 +412,7 @@ static int nbd_do_it(struct nbd_device *lo)
while ((req = nbd_read_stat(lo)) != NULL)
nbd_end_request(req);
sysfs_remove_file(&lo->disk->dev.kobj, &pid_attr.attr);
sysfs_remove_file(&disk_to_dev(lo->disk)->kobj, &pid_attr.attr);
return 0;
}