1 files changed, 16 insertions, 90 deletions

diff --git a/fs/partitions/check.c b/fs/partitions/check.c
index 0a8b0ad0c7e2..9c21119512b9 100644
--- a/fs/partitions/check.c
+++ b/fs/partitions/check.c
@@ -237,6 +237,13 @@ ssize_t part_size_show(struct device *dev,
         return sprintf(buf, "%llu\n",(unsigned long long)p->nr_sects);
 }
 
+ssize_t part_ro_show(struct device *dev,
+                       struct device_attribute *attr, char *buf)
+{
+        struct hd_struct *p = dev_to_part(dev);
+        return sprintf(buf, "%d\n", p->policy ? 1 : 0);
+}
+
 ssize_t part_alignment_offset_show(struct device *dev,
                                    struct device_attribute *attr, char *buf)
 {
@@ -312,6 +319,7 @@ ssize_t part_fail_store(struct device *dev,
 static DEVICE_ATTR(partition, S_IRUGO, part_partition_show, NULL);
 static DEVICE_ATTR(start, S_IRUGO, part_start_show, NULL);
 static DEVICE_ATTR(size, S_IRUGO, part_size_show, NULL);
+static DEVICE_ATTR(ro, S_IRUGO, part_ro_show, NULL);
 static DEVICE_ATTR(alignment_offset, S_IRUGO, part_alignment_offset_show, NULL);
 static DEVICE_ATTR(discard_alignment, S_IRUGO, part_discard_alignment_show,
                    NULL);
@@ -326,6 +334,7 @@ static struct attribute *part_attrs[] = {
         &dev_attr_partition.attr,
         &dev_attr_start.attr,
         &dev_attr_size.attr,
+        &dev_attr_ro.attr,
         &dev_attr_alignment_offset.attr,
         &dev_attr_discard_alignment.attr,
         &dev_attr_stat.attr,
@@ -372,6 +381,11 @@ static void delete_partition_rcu_cb(struct rcu_head *head)
         put_device(part_to_dev(part));
 }
 
+void __delete_partition(struct hd_struct *part)
+{
+        call_rcu(&part->rcu_head, delete_partition_rcu_cb);
+}
+
 void delete_partition(struct gendisk *disk, int partno)
 {
         struct disk_part_tbl *ptbl = disk->part_tbl;
@@ -390,7 +404,7 @@ void delete_partition(struct gendisk *disk, int partno)
         kobject_put(part->holder_dir);
         device_del(part_to_dev(part));
 
-        call_rcu(&part->rcu_head, delete_partition_rcu_cb);
+        hd_struct_put(part);
 }
 
 static ssize_t whole_disk_show(struct device *dev,
@@ -489,6 +503,7 @@ struct hd_struct *add_partition(struct gendisk *disk, int partno,
         if (!dev_get_uevent_suppress(ddev))
                 kobject_uevent(&pdev->kobj, KOBJ_ADD);
 
+        hd_ref_init(p);
         return p;
 
 out_free_info:
@@ -507,65 +522,6 @@ out_put:
         return ERR_PTR(err);
 }
 
-/* Not exported, helper to add_disk(). */
-void register_disk(struct gendisk *disk)
-{
-        struct device *ddev = disk_to_dev(disk);
-        struct block_device *bdev;
-        struct disk_part_iter piter;
-        struct hd_struct *part;
-        int err;
-
-        ddev->parent = disk->driverfs_dev;
-
-        dev_set_name(ddev, disk->disk_name);
-
-        /* delay uevents, until we scanned partition table */
-        dev_set_uevent_suppress(ddev, 1);
-
-        if (device_add(ddev))
-                return;
-        if (!sysfs_deprecated) {
-                err = sysfs_create_link(block_depr, &ddev->kobj,
-                                        kobject_name(&ddev->kobj));
-                if (err) {
-                        device_del(ddev);
-                        return;
-                }
-        }
-        disk->part0.holder_dir = kobject_create_and_add("holders", &ddev->kobj);
-        disk->slave_dir = kobject_create_and_add("slaves", &ddev->kobj);
-
-        /* No minors to use for partitions */
-        if (!disk_partitionable(disk))
-                goto exit;
-
-        /* No such device (e.g., media were just removed) */
-        if (!get_capacity(disk))
-                goto exit;
-
-        bdev = bdget_disk(disk, 0);
-        if (!bdev)
-                goto exit;
-
-        bdev->bd_invalidated = 1;
-        err = blkdev_get(bdev, FMODE_READ);
-        if (err < 0)
-                goto exit;
-        blkdev_put(bdev, FMODE_READ);
-
-exit:
-        /* announce disk after possible partitions are created */
-        dev_set_uevent_suppress(ddev, 0);
-        kobject_uevent(&ddev->kobj, KOBJ_ADD);
-
-        /* announce possible partitions */
-        disk_part_iter_init(&piter, disk, 0);
-        while ((part = disk_part_iter_next(&piter)))
-                kobject_uevent(&part_to_dev(part)->kobj, KOBJ_ADD);
-        disk_part_iter_exit(&piter);
-}
-
 static bool disk_unlock_native_capacity(struct gendisk *disk)
 {
         const struct block_device_operations *bdops = disk->fops;
@@ -728,33 +684,3 @@ fail:
 }
 
 EXPORT_SYMBOL(read_dev_sector);
-
-void del_gendisk(struct gendisk *disk)
-{
-        struct disk_part_iter piter;
-        struct hd_struct *part;
-
-        /* invalidate stuff */
-        disk_part_iter_init(&piter, disk,
-                             DISK_PITER_INCL_EMPTY | DISK_PITER_REVERSE);
-        while ((part = disk_part_iter_next(&piter))) {
-                invalidate_partition(disk, part->partno);
-                delete_partition(disk, part->partno);
-        }
-        disk_part_iter_exit(&piter);
-
-        invalidate_partition(disk, 0);
-        blk_free_devt(disk_to_dev(disk)->devt);
-        set_capacity(disk, 0);
-        disk->flags &= ~GENHD_FL_UP;
-        unlink_gendisk(disk);
-        part_stat_set_all(&disk->part0, 0);
-        disk->part0.stamp = 0;
-
-        kobject_put(disk->part0.holder_dir);
-        kobject_put(disk->slave_dir);
-        disk->driverfs_dev = NULL;
-        if (!sysfs_deprecated)
-                sysfs_remove_link(block_depr, dev_name(disk_to_dev(disk)));
-        device_del(disk_to_dev(disk));
-}