linux-kernel - Re: [RFC][PATCH v2 7/7] checkpatch: add pF/pf deprecation warning

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Message-ID: <20170921074351.GC773@jagdpanzerIV.localdomain>
Date:   Thu, 21 Sep 2017 16:43:51 +0900
From:   Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
To:     Helge Deller <deller@....de>, Joe Perches <joe@...ches.com>
Cc:     Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Tony Luck <tony.luck@...el.com>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        James Bottomley <jejb@...isc-linux.org>,
        Petr Mladek <pmladek@...e.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Jessica Yu <jeyu@...nel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        linux-ia64@...r.kernel.org, linux-parisc@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        Andy Whitcroft <apw@...onical.com>
Subject: Re: [RFC][PATCH v2 7/7] checkpatch: add pF/pf deprecation warning

On (09/20/17 11:24), Joe Perches wrote:
> On Wed, 2017-09-20 at 19:53 +0200, Helge Deller wrote:
[..]
> > Is it worth to mention, that it's still needed in older kernels?
> > Just in case some patch get's backported.

good question.

> I think probably not.
> 
> There are relatively few references and
> modifications are unlikely to be backported.

I tend to agree.

unlikely anyone backports printk message updates. I have quickly glanced
through stable-4.9 and haven't seen such backports. well, may be there
are some.

can tweak the warning a bit, probably. e.g. "if you are planning to
backport your change to kernels older than 4.14 then ignore this
warning". but not sure if it's worth it.

	-ss