linux-kernel - Re: [PATCH v3 1/2] timer: make deferrable cpu unbound timers really not bound to a cpu

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Date:   Tue, 5 May 2020 08:08:27 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Prasad Sodagudi <psodagud@...eaurora.org>, tglx@...utronix.de,
        john.stultz@...aro.org, sboyd@...nel.org, tj@...nel.org
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        saravanak@...gle.com, psodagud@...eaurora.org,
        pkondeti@...eaurora.org, Joonwoo Park <joonwoop@...eaurora.org>
Subject: Re: [PATCH v3 1/2] timer: make deferrable cpu unbound timers really
 not bound to a cpu

Hi Prasad,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on tip/timers/core]
[also build test ERROR on tip/auto-latest tip/timers/nohz v5.7-rc4 next-20200504]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Prasad-Sodagudi/timer-make-deferrable-cpu-unbound-timers-really-not-bound-to-a-cpu/20200503-025049
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 4479730e9263befbb9ce9563a09563db2acb8f7c
config: ia64-randconfig-a001-20200505 (attached as .config)
compiler: ia64-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day GCC_VERSION=9.3.0 make.cross ARCH=ia64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

   kernel/time/timer.c: In function 'get_timer_cpu_base':
   kernel/time/timer.c:847:11: error: 'timer_base_deferrable' undeclared (first use in this function)
     847 |   base = &timer_base_deferrable;
         |           ^~~~~~~~~~~~~~~~~~~~~
   kernel/time/timer.c:847:11: note: each undeclared identifier is reported only once for each function it appears in
   kernel/time/timer.c: In function 'get_timer_this_cpu_base':
   kernel/time/timer.c:866:11: error: 'timer_base_deferrable' undeclared (first use in this function)
     866 |   base = &timer_base_deferrable;
         |           ^~~~~~~~~~~~~~~~~~~~~
   kernel/time/timer.c: In function 'run_timer_softirq':
>> kernel/time/timer.c:1803:7: error: 'tick_do_timer_cpu' undeclared (first use in this function); did you mean 'tick_dep_clear_cpu'?
    1803 |   if (tick_do_timer_cpu == TICK_DO_TIMER_NONE ||
         |       ^~~~~~~~~~~~~~~~~
         |       tick_dep_clear_cpu
>> kernel/time/timer.c:1803:28: error: 'TICK_DO_TIMER_NONE' undeclared (first use in this function)
    1803 |   if (tick_do_timer_cpu == TICK_DO_TIMER_NONE ||
         |                            ^~~~~~~~~~~~~~~~~~
   kernel/time/timer.c:1805:18: error: 'timer_base_deferrable' undeclared (first use in this function)
    1805 |    __run_timers(&timer_base_deferrable);
         |                  ^~~~~~~~~~~~~~~~~~~~~

vim +1803 kernel/time/timer.c

  1791	
  1792	/*
  1793	 * This function runs timers and the timer-tq in bottom half context.
  1794	 */
  1795	static __latent_entropy void run_timer_softirq(struct softirq_action *h)
  1796	{
  1797		struct timer_base *base = this_cpu_ptr(&timer_bases[BASE_STD]);
  1798	
  1799		__run_timers(base);
  1800		if (IS_ENABLED(CONFIG_NO_HZ_COMMON)) {
  1801			__run_timers(this_cpu_ptr(&timer_bases[BASE_DEF]));
  1802	#ifdef CONFIG_SMP
> 1803			if (tick_do_timer_cpu == TICK_DO_TIMER_NONE ||
  1804					tick_do_timer_cpu == smp_processor_id())
  1805				__run_timers(&timer_base_deferrable);
  1806	#endif
  1807		}
  1808	}
  1809	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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