linux-kernel - Re: [RFC PATCH] gpiolib: remove extra

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Date: Thu, 21 Dec 2023 10:26:03 +0100
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Linus Walleij <linus.walleij@...aro.org>
Cc: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>, Kent Gibson <warthog618@...il.com>, 
	linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: Re: [RFC PATCH] gpiolib: remove extra_checks

On Wed, Dec 20, 2023 at 4:28 PM Linus Walleij <linus.walleij@...aro.org> wrote:
>
> On Wed, Dec 20, 2023 at 3:03 PM Andy Shevchenko
> <andriy.shevchenko@...ux.intel.com> wrote:
> > On Tue, Dec 19, 2023 at 09:11:02PM +0100, Bartosz Golaszewski wrote:
> > > From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> > >
> > > extra_checks is only used in a few places. It also depends on
> >
> > > a non-standard DEBUG define one needs to add to the source file.
> >
> > Huh?!
> >
> > What then CONFIG_DEBUG_GPIO is about?
>
> Yeah that is some helper DBrownell added because like me he could
> never figure out how to pass -DDEBUG to a single file on the command
> line and besides gpiolib is several files. I added the same to pinctrl
> to get core debug messages.
>
> I guess Bartosz means extra_checks is == a non-standard DEBUG
> define.
>
> Yours,
> Linus Walleij

I think this patch is still correct. Defining DEBUG makes sense to
enable dev_dbg() messages. CONFIG_DEBUG_GPIO is used by one driver to
enable code that can lead to undefined behavior (should it maybe be
#if 0?). So the Makefile bit and the Kconfig option can stay but I'd
love to see extra_checks gone.

Bart