On Thu, Jan 04, 2018 at 06:39:24PM +0800, Ming Lei wrote: > When detaching loop disk, neither we remove loop partitions, nor > invalidate them. This way may cause data loss, and often confuse > people. > > This patch fixes the above issue by removing & invalidating loop > partitions in loop_clr_fd(), Please add a comment explaining the call (e.g. the weird loop case of keeping unbound devices around). Also dasd seems to implement this functionality by iterating over all partitions and then calling ioctl_by_bdev(bdev, BLKPG, ..) on it. Please switch it to you new helper assuming there is a good reason to even do this to start with. CCing the maintainers to confirm that. And while you'e at it split the block and loop bits into separate patches. > +void del_gendisk_partitions(struct gendisk *disk) Add a comment explanining the function, please. > struct disk_part_iter piter; > struct hd_struct *part; > > - blk_integrity_del(disk); > - disk_del_events(disk); > - > /* invalidate stuff */ > disk_part_iter_init(&piter, disk, > DISK_PITER_INCL_EMPTY | DISK_PITER_REVERSE); > @@ -714,7 +711,17 @@ void del_gendisk(struct gendisk *disk) > disk_part_iter_exit(&piter); > > invalidate_partition(disk, 0); > +} > +EXPORT_SYMBOL(del_gendisk_partitions); EXPORT_SYMBOL_GPL, please.
