On Thu, Jul 20, 2023 at 05:02:32PM +0100, Daniel Golle wrote: > 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. I'm not sure a class_interface makes much sense here. Why does the block layer even need to know about you using a device a nvmem provider? As far as I can tell your provider should layer entirely above the block layer and not have to be integrated with it.