linux-kernel - Re: txtimestamp.c:164:29: warning: format '0' expects argument of type 'long unsigned int', but argument 3 has type 'int64

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Message-ID: <CA+G9fYtNQh8KygC7ufvkMuB_d7PX-meknhOpDcuQiPx8oBcrCA@mail.gmail.com>
Date:   Thu, 6 Jan 2022 17:38:16 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-stable <stable@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>, Netdev <netdev@...r.kernel.org>,
        lkft-triage@...ts.linaro.org, Shuah Khan <shuah@...nel.org>,
        Jakub Kicinski <kuba@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Yangbo Lu <yangbo.lu@....com>,
        Grygorii Strashko <grygorii.strashko@...com>,
        Richard Cochran <richardcochran@...il.com>,
        Jian Yang <jianyang@...gle.com>
Subject: Re: txtimestamp.c:164:29: warning: format '0' expects argument of
 type 'long unsigned int', but argument 3 has type 'int64_t' {aka 'long long
 int'} [-Wformat=]

On Thu, 6 Jan 2022 at 16:07, Greg Kroah-Hartman
<gregkh@...uxfoundation.org> wrote:
>
> On Thu, Jan 06, 2022 at 03:39:09PM +0530, Naresh Kamboju wrote:
> > While building selftests the following warnings were noticed for arm
> > architecture on Linux stable v5.15.13 kernel and also on Linus's tree.
> >
> > arm-linux-gnueabihf-gcc -Wall -Wl,--no-as-needed -O2 -g
> > -I../../../../usr/include/    txtimestamp.c  -o
> > /home/tuxbuild/.cache/tuxmake/builds/current/kselftest/net/txtimestamp
> > txtimestamp.c: In function 'validate_timestamp':
> > txtimestamp.c:164:29: warning: format '0' expects argument of type
> > 'long unsigned int', but argument 3 has type 'int64_t' {aka 'long long
> > int'} [-Wformat=]
> >   164 |   fprintf(stderr, "ERROR: 0 us expected between 0 and 0\n",

<trim>

> Same question as before, is this a regression, and if so, any pointers
> to a fix?

This is a known warning on Linus's tree.
The fix should come from Linus's tree.

- Naresh