Re: [PATCH RFC 1/2] drivers/base: export lock_device_hotplug/unlock_device_hotplug

On Fri, Aug 17, 2018 at 01:56:35PM +0200, David Hildenbrand wrote:

E.g. When adding the memory block devices, we know that there won't be a
driver to attach to (as there are no drivers for the "memory" subsystem)
- the bus_probe_device() function that takes the device_lock() could
pretty much be avoided for that case. But burying such special cases
down in core driver code definitely won't make locking related to memory
hotplug easier.

You don't have to have a driver for a device if you don't want to, or
you can just have a default one for all memory devices if you somehow
need it.  No reason to not do this if it makes things easier for you.

thanks,

greg k-h