linux-kernel - Re: [PATCH] pinctrl: pxa: pxa2xx: Remove 'pxa2xx_pinctrl

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Date:   Thu, 4 Jun 2020 20:35:01 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Joe Perches <joe@...ches.com>
Cc:     Julia Lawall <julia.lawall@...ia.fr>,
        Linus Walleij <linus.walleij@...aro.org>,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        Robert Jarzmik <robert.jarzmik@...e.fr>,
        Daniel Mack <daniel@...que.org>,
        Haojian Zhuang <haojian.zhuang@...il.com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] pinctrl: pxa: pxa2xx: Remove 'pxa2xx_pinctrl_exit()'
 which is unused and broken

On Thu, Jun 04, 2020 at 09:08:44AM -0700, Joe Perches wrote:
> On Thu, 2020-06-04 at 15:30 +0300, Dan Carpenter wrote:
> > On Thu, Jun 04, 2020 at 01:42:12PM +0200, Julia Lawall wrote:
> > > OK, I recall a discussion with Dan where he suggested that some things
> > > that were not actually bug fixes could also merit a Fixes tag.  But it's
> > > probably better if he weighs in directly.
> > 
> > I generally think Fixes should only be used for "real bug" fixes.
> > 
> > The one exception is when I'm reviewing a patch that fixes an "unused
> > assignment" static checker warning is that I know which commit
> > introduced the warning.  I don't have strong feelings if it's in the
> > Fixes tag or if it's just mentioned in the commit message.
> 
> My view is that changes that silence compiler warnings are
> not fixing bugs and that these changes should generally not
> be backported.
> 

The Fixes tag is useful for backports but that's not whole the point of
it.  It's also for collecting metrics.  Also sometimes we fix the bug
before the kernel is released so the Fixes tag means we can automatically
ignore those ones when we look at which patches to backport.

I don't care if the "unused assignment" patches use a Fixes tag or just
mention the commit.  Either way the information is there for when I
review the patch.

regards,
dan carpenter