Re: [PATCH 3/3] libnvdimm/ioctl: Switch to cdev_register_queued()

[Greg KH]

On Wed, Jan 20, 2021 at 11:39:08AM -0800, Dan Williams wrote:
> The ioctl implementation in libnvdimm is a case study in what can be
> cleaned up when the cdev core handles synchronizing in-flight ioctls
> with device removal. Switch to cdev_register_queued() which allows for
> the ugly context lookup and activity tracking implementation to be
> dropped, among other cleanups.

I'm confused, the cdev handles the filesystem access from /dev/ which
handles the ioctl.  Any use of a cdev with relationship to a struct
device that might go away is independent, so we really should not tie
these together in any way.

thanks,

greg k-h