On Thu, Jul 20, 2023 at 12:04:43AM -0700, Christoph Hellwig wrote: > The layering here is exactly the wrong way around. This block device > as nvmem provide has not business sitting in the block layer and being > keyed ff the gendisk registration. Instead you should create a new > nvmem backed that opens the block device as needed if it fits your > OF description without any changes to the core block layer. > Ok. I will use a class_interface instead.