On Fri, 30 Oct 2020 22:10:42 -0700 Xie He wrote:

quoted

The usual way of getting rid of old code is to move it to staging/
for a few releases then delete it, like Arnd just did with wimax.  

Oh. OK. But I see "include/linux/if_frad.h" is included in
"net/socket.c", and there's still some code in "net/socket.c" related
to it. If we move all these files to "staging/", we need to change the
"include" line in "net/socket.c" to point to the new location, and we
still need to keep a little code in "net/socket.c". So I think if we
move it to "staging/", we can't do this in a clean way.

I'd just place that code under appropriate #ifdef CONFIG_ so we don't
forget to remove it later.  It's just the dlci_ioctl_hook, right?

Maybe others have better ideas, Arnd?