linux-kernel - Re: [PATCH] clkdev: report over-sized strings when creating clkdev entries

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Message-ID: <ZjNIiDeXIjXhJlT4@shell.armlinux.org.uk>
Date: Thu, 2 May 2024 09:02:16 +0100
From: "Russell King (Oracle)" <linux@...linux.org.uk>
To: Stephen Boyd <sboyd@...nel.org>
Cc: linux-arm-kernel@...ts.infradead.org,
	Duanqiang Wen <duanqiangwen@...-swift.com>, mturquette@...libre.com,
	linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] clkdev: report over-sized strings when creating clkdev
 entries

On Wed, May 01, 2024 at 06:02:54PM -0700, Stephen Boyd wrote:
> Quoting Stephen Boyd (2024-05-01 17:59:16)
> > Quoting Russell King (Oracle) (2024-03-15 04:47:55)
> > > Report an error when an attempt to register a clkdev entry results in a
> > > truncated string so the problem can be easily spotted.
> > > 
> > > Reported by: Duanqiang Wen <duanqiangwen@...-swift.com>
> > > Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
> > > ---
> > 
> > Applied to clk-next
> > 
> 
> And backed out because I get a compilation failure
> 
> drivers/clk/clkdev.c: In function 'vclkdev_alloc':
> drivers/clk/clkdev.c:182:17: error: function 'vclkdev_alloc' might be a candidate for 'gnu_printf' format attribute [-Werror=suggest-attribute=format]
>   182 |                 res = vsnprintf(cla->dev_id, sizeof(cla->dev_id), dev_fmt, ap);
>       |                 ^~~
> cc1: all warnings being treated as errors
> make[5]: *** [scripts/Makefile.build:244: drivers/clk/clkdev.o] Error 1
> make[4]: *** [scripts/Makefile.build:485: drivers/clk] Error 2

It builds fine for me. I don't get this _error_, and it's really no
different from what it originally was - instead of using vcsnprintf()
we're now using vsnprintf(). That should make no difference what so
ever.

-- 
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