TononixOS/ubports_kernel_google_msm
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

block: move __dev from disk to part0

Browse Source 
Move disk->__dev to part0->__dev.  This simplifies bdget_disk() and
lookup_devt() and allows common sysfs attributes to be unified.
part_to_disk() is updated to handle part0 -> disk.

Updated to include a fix from Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>,
he writes:

"part0 is a "special" partition and doesn't need to have capacity set - this
fixes regression caused by "block: move __dev from disk to part0" commit."

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Tejun Heo
2008-08-29 09:01:47 +02:00
committed by Jens Axboe
parent 80795aefb7
commit 548b10eb29
2 changed files with 20 additions and 33 deletions
Download Patch File Download Diff File Expand all files Collapse all files

40
block/genhd.c
View File

@@ -537,22 +537,15 @@ struct gendisk *get_gendisk(dev_t devt, int *partno)
*/
extern struct block_device *bdget_disk(struct gendisk *disk, int partno)
{
dev_t devt = MKDEV(0, 0);
struct hd_struct *part;
struct block_device *bdev = NULL;
if (partno == 0)
devt = disk_devt(disk);
else {
struct hd_struct *part;
part = disk_get_part(disk, partno);
if (part && (part->nr_sects || partno == 0))
bdev = bdget(part_devt(part));
disk_put_part(part);
part = disk_get_part(disk, partno);
if (part && part->nr_sects)
devt = part_devt(part);
disk_put_part(part);
}
if (likely(devt != MKDEV(0, 0)))
return bdget(devt);
return NULL;
return bdev;
}
EXPORT_SYMBOL(bdget_disk);
@@ -1000,27 +993,18 @@ dev_t blk_lookup_devt(const char *name, int partno)
class_dev_iter_init(&iter, &block_class, NULL, &disk_type);
while ((dev = class_dev_iter_next(&iter))) {
struct gendisk *disk = dev_to_disk(dev);
struct hd_struct *part;
if (strcmp(dev->bus_id, name))
continue;
if (partno < 0 || partno >= disk_max_parts(disk))
continue;
if (partno == 0)
devt = disk_devt(disk);
else {
struct hd_struct *part;
part = disk_get_part(disk, partno);
if (!part || !part->nr_sects) {
disk_put_part(part);
continue;
}
part = disk_get_part(disk, partno);
if (part && (part->nr_sects || partno == 0)) {
devt = part_devt(part);
disk_put_part(part);
break;
}
break;
disk_put_part(part);
}
class_dev_iter_exit(&iter);
return devt;