linux-kernel - Re: [PATCH] gpiolib: acpi: use correct format characters

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Message-ID: <YjSROmYwwGhpsXMl@smile.fi.intel.com>
Date:   Fri, 18 Mar 2022 16:03:38 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Nick Desaulniers <ndesaulniers@...gle.com>
Cc:     Bill Wendling <morbo@...gle.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Nathan Chancellor <nathan@...nel.org>,
        linux-gpio@...r.kernel.org, linux-acpi@...r.kernel.org,
        linux-kernel@...r.kernel.org, llvm@...ts.linux.dev
Subject: Re: [PATCH] gpiolib: acpi: use correct format characters

On Thu, Mar 17, 2022 at 11:11:21AM -0700, Nick Desaulniers wrote:
> On Thu, Mar 17, 2022 at 2:07 AM Andy Shevchenko
> <andriy.shevchenko@...ux.intel.com> wrote:
> > On Wed, Mar 16, 2022 at 02:30:55PM -0700, Bill Wendling wrote:

> > NAK.

I hope you read my follow up to this.

> Andy,
> Our goal is to enable -Wformat for CC=clang.  Please see also:
> commit cbacb5ab0aa0 ("docs: printk-formats: Stop encouraging use of
> unnecessary %h[xudi] and %hh[xudi]")

Not that I agree on that commit for %h[h]x

	signed char ch = -1;
	printf("%x\n", ch);
	printf("%hhx\n", ch);

That's why my first reaction on this change was NAK.

> and the lore link it cites.
> https://lore.kernel.org/lkml/CAHk-=wgoxnmsj8GEVFJSvTwdnWm8wVJthefNk2n6+4TC=20e0Q@mail.gmail.com/
> (I saw your follow up; this patch is one of the less controversial
> ones though since the types are not ones that are promoted).

That said, I hope you are very well aware of the case.

-- 
With Best Regards,
Andy Shevchenko