netdev - Re: [PATCH net-next] net: dlci: Deprecate the DLCI driver (aka the Frame Relay layer)

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Message-ID: <20201031095146.5e6945a1@kicinski-fedora-PC1C0HJN.hsd1.ca.comcast.net>
Date:   Sat, 31 Oct 2020 09:51:46 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Xie He <xie.he.0141@...il.com>, Arnd Bergmann <arnd@...db.de>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Linux Kernel Network Developers <netdev@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Lee Jones <lee.jones@...aro.org>,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Krzysztof Halasa <khc@...waw.pl>
Subject: Re: [PATCH net-next] net: dlci: Deprecate the DLCI driver (aka the
 Frame Relay layer)

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