linux-kernel - Re: [PATCH] clocksource: Use correct limit for wd-cs-wd read back delay in printing

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Message-ID: <20250801024253.GA360@bytedance>
Date: Fri, 1 Aug 2025 10:42:53 +0800
From: Aaron Lu <ziqianlu@...edance.com>
To: kernel test robot <lkp@...el.com>
Cc: "Paul E. McKenney" <paulmck@...nel.org>, llvm@...ts.linux.dev,
	oe-kbuild-all@...ts.linux.dev, John Stultz <jstultz@...gle.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Stephen Boyd <sboyd@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] clocksource: Use correct limit for wd-cs-wd read back
 delay in printing

On Fri, Aug 01, 2025 at 09:48:40AM +0800, kernel test robot wrote:
> Hi Aaron,
> 
> kernel test robot noticed the following build warnings:
> 
> [auto build test WARNING on tip/timers/core]
> [also build test WARNING on linus/master v6.16 next-20250731]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use '--base' as documented in
> https://git-scm.com/docs/git-format-patch#_base_tree_information]
> 
> url:    https://github.com/intel-lab-lkp/linux/commits/Aaron-Lu/clocksource-Use-correct-limit-for-wd-cs-wd-read-back-delay-in-printing/20250731-200709
> base:   tip/timers/core
> patch link:    https://lore.kernel.org/r/20250731120454.GA309%40bytedance
> patch subject: [PATCH] clocksource: Use correct limit for wd-cs-wd read back delay in printing
> config: i386-buildonly-randconfig-001-20250801 (https://download.01.org/0day-ci/archive/20250801/202508010911.AmkxEw1p-lkp@intel.com/config)
> compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250801/202508010911.AmkxEw1p-lkp@intel.com/reproduce)
> 
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@...el.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202508010911.AmkxEw1p-lkp@intel.com/
> 
> All warnings (new ones prefixed by >>):
> 
> >> kernel/time/clocksource.c:293:43: warning: format specifies type 'long' but the argument has type 'int64_t' (aka 'long long') [-Wformat]
>      292 |         pr_warn("timekeeping watchdog on CPU%d: wd-%s-wd excessive read-back delay of %lldns vs. limit of %ldns, wd-wd read-back delay only %lldns, attempt %d, marking %s unstable\n",
>          |                                                                                                           ~~~
>          |                                                                                                           %lld

Thanks for catching this, will fix it in next version.

>      293 |                 smp_processor_id(), cs->name, wd_delay, md + cs->uncertainty_margin, wd_seq_delay, nretries, cs->name);
>          |                                                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~