mirror of
https://github.com/followmsi/android_kernel_google_msm.git
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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>
This commit is contained in:
Tejun Heo
Jens Axboe
parent
dddd9dc340
commit
d2bf1b6723
4 changed files with 87 additions and 94 deletions
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@ -502,6 +502,64 @@ static int exact_lock(dev_t devt, void *data)
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return 0;
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}
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void register_disk(struct gendisk *disk)
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{
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struct device *ddev = disk_to_dev(disk);
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struct block_device *bdev;
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struct disk_part_iter piter;
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struct hd_struct *part;
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int err;
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ddev->parent = disk->driverfs_dev;
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dev_set_name(ddev, disk->disk_name);
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/* delay uevents, until we scanned partition table */
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dev_set_uevent_suppress(ddev, 1);
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if (device_add(ddev))
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return;
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if (!sysfs_deprecated) {
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err = sysfs_create_link(block_depr, &ddev->kobj,
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kobject_name(&ddev->kobj));
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if (err) {
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device_del(ddev);
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return;
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}
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}
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disk->part0.holder_dir = kobject_create_and_add("holders", &ddev->kobj);
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disk->slave_dir = kobject_create_and_add("slaves", &ddev->kobj);
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/* No minors to use for partitions */
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if (!disk_partitionable(disk))
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goto exit;
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/* No such device (e.g., media were just removed) */
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if (!get_capacity(disk))
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goto exit;
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bdev = bdget_disk(disk, 0);
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if (!bdev)
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goto exit;
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bdev->bd_invalidated = 1;
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err = blkdev_get(bdev, FMODE_READ, NULL);
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if (err < 0)
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goto exit;
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blkdev_put(bdev, FMODE_READ);
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exit:
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/* announce disk after possible partitions are created */
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dev_set_uevent_suppress(ddev, 0);
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kobject_uevent(&ddev->kobj, KOBJ_ADD);
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/* announce possible partitions */
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disk_part_iter_init(&piter, disk, 0);
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while ((part = disk_part_iter_next(&piter)))
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kobject_uevent(&part_to_dev(part)->kobj, KOBJ_ADD);
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disk_part_iter_exit(&piter);
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}
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/**
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* add_disk - add partitioning information to kernel list
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* @disk: per-device partitioning information
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@ -552,17 +610,43 @@ void add_disk(struct gendisk *disk)
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"bdi");
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WARN_ON(retval);
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}
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EXPORT_SYMBOL(add_disk);
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EXPORT_SYMBOL(del_gendisk); /* in partitions/check.c */
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void unlink_gendisk(struct gendisk *disk)
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void del_gendisk(struct gendisk *disk)
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{
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struct disk_part_iter piter;
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struct hd_struct *part;
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/* invalidate stuff */
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disk_part_iter_init(&piter, disk,
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DISK_PITER_INCL_EMPTY | DISK_PITER_REVERSE);
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while ((part = disk_part_iter_next(&piter))) {
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invalidate_partition(disk, part->partno);
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delete_partition(disk, part->partno);
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}
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disk_part_iter_exit(&piter);
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invalidate_partition(disk, 0);
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blk_free_devt(disk_to_dev(disk)->devt);
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set_capacity(disk, 0);
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disk->flags &= ~GENHD_FL_UP;
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sysfs_remove_link(&disk_to_dev(disk)->kobj, "bdi");
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bdi_unregister(&disk->queue->backing_dev_info);
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blk_unregister_queue(disk);
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blk_unregister_region(disk_devt(disk), disk->minors);
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part_stat_set_all(&disk->part0, 0);
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disk->part0.stamp = 0;
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kobject_put(disk->part0.holder_dir);
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kobject_put(disk->slave_dir);
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disk->driverfs_dev = NULL;
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if (!sysfs_deprecated)
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sysfs_remove_link(block_depr, dev_name(disk_to_dev(disk)));
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device_del(disk_to_dev(disk));
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}
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EXPORT_SYMBOL(del_gendisk);
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/**
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* get_gendisk - get partitioning information for a given device
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@ -516,65 +516,6 @@ out_put:
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return ERR_PTR(err);
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}
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/* Not exported, helper to add_disk(). */
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void register_disk(struct gendisk *disk)
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{
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struct device *ddev = disk_to_dev(disk);
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struct block_device *bdev;
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struct disk_part_iter piter;
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struct hd_struct *part;
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int err;
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ddev->parent = disk->driverfs_dev;
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dev_set_name(ddev, disk->disk_name);
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/* delay uevents, until we scanned partition table */
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dev_set_uevent_suppress(ddev, 1);
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if (device_add(ddev))
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return;
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if (!sysfs_deprecated) {
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err = sysfs_create_link(block_depr, &ddev->kobj,
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kobject_name(&ddev->kobj));
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if (err) {
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device_del(ddev);
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return;
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}
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}
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disk->part0.holder_dir = kobject_create_and_add("holders", &ddev->kobj);
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disk->slave_dir = kobject_create_and_add("slaves", &ddev->kobj);
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/* No minors to use for partitions */
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if (!disk_partitionable(disk))
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goto exit;
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/* No such device (e.g., media were just removed) */
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if (!get_capacity(disk))
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goto exit;
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bdev = bdget_disk(disk, 0);
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if (!bdev)
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goto exit;
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bdev->bd_invalidated = 1;
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err = blkdev_get(bdev, FMODE_READ, NULL);
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if (err < 0)
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goto exit;
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blkdev_put(bdev, FMODE_READ);
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exit:
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/* announce disk after possible partitions are created */
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dev_set_uevent_suppress(ddev, 0);
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kobject_uevent(&ddev->kobj, KOBJ_ADD);
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/* announce possible partitions */
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disk_part_iter_init(&piter, disk, 0);
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while ((part = disk_part_iter_next(&piter)))
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kobject_uevent(&part_to_dev(part)->kobj, KOBJ_ADD);
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disk_part_iter_exit(&piter);
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}
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static bool disk_unlock_native_capacity(struct gendisk *disk)
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{
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const struct block_device_operations *bdops = disk->fops;
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@ -737,33 +678,3 @@ fail:
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}
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EXPORT_SYMBOL(read_dev_sector);
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void del_gendisk(struct gendisk *disk)
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{
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struct disk_part_iter piter;
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struct hd_struct *part;
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/* invalidate stuff */
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disk_part_iter_init(&piter, disk,
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DISK_PITER_INCL_EMPTY | DISK_PITER_REVERSE);
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while ((part = disk_part_iter_next(&piter))) {
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invalidate_partition(disk, part->partno);
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delete_partition(disk, part->partno);
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}
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disk_part_iter_exit(&piter);
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invalidate_partition(disk, 0);
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blk_free_devt(disk_to_dev(disk)->devt);
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set_capacity(disk, 0);
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disk->flags &= ~GENHD_FL_UP;
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unlink_gendisk(disk);
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part_stat_set_all(&disk->part0, 0);
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disk->part0.stamp = 0;
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kobject_put(disk->part0.holder_dir);
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kobject_put(disk->slave_dir);
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disk->driverfs_dev = NULL;
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if (!sysfs_deprecated)
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sysfs_remove_link(block_depr, dev_name(disk_to_dev(disk)));
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device_del(disk_to_dev(disk));
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}
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@ -643,7 +643,6 @@ static inline void rq_flush_dcache_pages(struct request *rq)
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extern int blk_register_queue(struct gendisk *disk);
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extern void blk_unregister_queue(struct gendisk *disk);
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extern void register_disk(struct gendisk *dev);
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extern void generic_make_request(struct bio *bio);
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extern void blk_rq_init(struct request_queue *q, struct request *rq);
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extern void blk_put_request(struct request *);
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@ -394,7 +394,6 @@ extern void part_round_stats(int cpu, struct hd_struct *part);
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/* block/genhd.c */
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extern void add_disk(struct gendisk *disk);
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extern void del_gendisk(struct gendisk *gp);
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extern void unlink_gendisk(struct gendisk *gp);
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extern struct gendisk *get_gendisk(dev_t dev, int *partno);
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extern struct block_device *bdget_disk(struct gendisk *disk, int partno);
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