linux-kernel - Re: [PATCH 4/4] kernel/time/clockevents: compensate for monotonic clock's dynamic frequency

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Date:	Sun, 10 Jul 2016 21:56:09 +0800
From:	kbuild test robot <lkp@...el.com>
To:	Nicolai Stange <nicstange@...il.com>
Cc:	kbuild-all@...org, Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	John Stultz <john.stultz@...aro.org>,
	Borislav Petkov <bp@...e.de>,
	Paolo Bonzini <pbonzini@...hat.com>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	Hidehiro Kawai <hidehiro.kawai.ez@...achi.com>,
	"Peter Zijlstra (Intel)" <peterz@...radead.org>,
	"Christopher S. Hall" <christopher.s.hall@...el.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	linux-kernel@...r.kernel.org, Nicolai Stange <nicstange@...il.com>
Subject: Re: [PATCH 4/4] kernel/time/clockevents: compensate for monotonic
 clock's dynamic frequency

Hi,

[auto build test ERROR on tip/timers/core]
[also build test ERROR on v4.7-rc6 next-20160708]
[cannot apply to tip/x86/core]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Nicolai-Stange/avoid-double-timer-interrupt-with-nohz-and-Intel-TSC/20160710-202914
config: sh-sh7785lcr_32bit_defconfig (attached as .config)
compiler: sh4-linux-gnu-gcc (Debian 5.3.1-8) 5.3.1 20160205
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=sh 

All errors (new ones prefixed by >>):

   kernel/built-in.o: In function `timekeeping_mono_interval_to_raw':
>> kernel/time/timekeeping.c:2164: undefined reference to `__divdi3'

vim +2164 kernel/time/timekeeping.c

  2158		 * that is they cancel.
  2159		 */
  2160		if (KTIME_MAX / raw_mult < interval)
  2161			return KTIME_MAX;
  2162		raw = interval * raw_mult;
  2163	
> 2164		if (KTIME_MAX - mono_mult / 2 < raw)
  2165			return KTIME_MAX;
  2166		raw += mono_mult / 2; /* round properly */
  2167		raw /= mono_mult;

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

Download attachment ".config.gz" of type "application/octet-stream" (16948 bytes)