diff options
Diffstat (limited to 'block/genhd.c')
| -rw-r--r-- | block/genhd.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/block/genhd.c b/block/genhd.c index b922d4801c87..9074f384b097 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -189,6 +189,7 @@ void add_disk(struct gendisk *disk) disk->minors, NULL, exact_match, exact_lock, disk); register_disk(disk); blk_register_queue(disk); + blk_register_filter(disk); bdi = &disk->queue->backing_dev_info; bdi_register_dev(bdi, MKDEV(disk->major, disk->first_minor)); @@ -200,6 +201,7 @@ EXPORT_SYMBOL(del_gendisk); /* in partitions/check.c */ void unlink_gendisk(struct gendisk *disk) { + blk_unregister_filter(disk); sysfs_remove_link(&disk->dev.kobj, "bdi"); bdi_unregister(&disk->queue->backing_dev_info); blk_unregister_queue(disk); @@ -400,6 +402,14 @@ static ssize_t disk_removable_show(struct device *dev, (disk->flags & GENHD_FL_REMOVABLE ? 1 : 0)); } +static ssize_t disk_ro_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct gendisk *disk = dev_to_disk(dev); + + return sprintf(buf, "%d\n", disk->policy ? 1 : 0); +} + static ssize_t disk_size_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -472,6 +482,7 @@ static ssize_t disk_fail_store(struct device *dev, static DEVICE_ATTR(range, S_IRUGO, disk_range_show, NULL); static DEVICE_ATTR(removable, S_IRUGO, disk_removable_show, NULL); +static DEVICE_ATTR(ro, S_IRUGO, disk_ro_show, NULL); static DEVICE_ATTR(size, S_IRUGO, disk_size_show, NULL); static DEVICE_ATTR(capability, S_IRUGO, disk_capability_show, NULL); static DEVICE_ATTR(stat, S_IRUGO, disk_stat_show, NULL); @@ -483,6 +494,7 @@ static struct device_attribute dev_attr_fail = static struct attribute *disk_attrs[] = { &dev_attr_range.attr, &dev_attr_removable.attr, + &dev_attr_ro.attr, &dev_attr_size.attr, &dev_attr_capability.attr, &dev_attr_stat.attr, |
