block: move register_disk() and del_gendisk() to block/genhd.c

There's no reason for register_disk() and del_gendisk() to be in
fs/partitions/check.c.  Move both to genhd.c.  While at it, collapse
unlink_gendisk(), which was artificially in a separate function due to
genhd.c / check.c split, into del_gendisk().

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

diff --git a/block/genhd.c b/block/genhd.c
index 0905ab2..2e5e4c0 100644 (file)
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -502,6 +502,64 @@ static int exact_lock(dev_t devt, void *data)
        return 0;
 }
 
+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, NULL);
+       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);
+}
+
 /**
  * add_disk - add partitioning information to kernel list
  * @disk: per-device partitioning information
@@ -552,17 +610,43 @@ void add_disk(struct gendisk *disk)
                                   "bdi");
        WARN_ON(retval);
 }
-
 EXPORT_SYMBOL(add_disk);
-EXPORT_SYMBOL(del_gendisk);    /* in partitions/check.c */
 
-void unlink_gendisk(struct gendisk *disk)
+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;
+
        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);
+
+       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));
 }
+EXPORT_SYMBOL(del_gendisk);
 
 /**
  * get_gendisk - get partitioning information for a given device

diff --git a/fs/partitions/check.c b/fs/partitions/check.c
index bdf8d3c..9a48d65 100644 (file)
--- a/fs/partitions/check.c
+++ b/fs/partitions/check.c
@@ -516,65 +516,6 @@ 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, NULL);
-       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;
@@ -737,33 +678,3 @@ 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));
-}

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index aae86fd..83031bc 100644 (file)
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -643,7 +643,6 @@ static inline void rq_flush_dcache_pages(struct request *rq)
 
 extern int blk_register_queue(struct gendisk *disk);
 extern void blk_unregister_queue(struct gendisk *disk);
-extern void register_disk(struct gendisk *dev);
 extern void generic_make_request(struct bio *bio);
 extern void blk_rq_init(struct request_queue *q, struct request *rq);
 extern void blk_put_request(struct request *);

diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index 5e4e692..56e17ed 100644 (file)
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -394,7 +394,6 @@ extern void part_round_stats(int cpu, struct hd_struct *part);
 /* block/genhd.c */
 extern void add_disk(struct gendisk *disk);
 extern void del_gendisk(struct gendisk *gp);
-extern void unlink_gendisk(struct gendisk *gp);
 extern struct gendisk *get_gendisk(dev_t dev, int *partno);
 extern struct block_device *bdget_disk(struct gendisk *disk, int partno);