linux-kernel - Re: [PATCH v3] power: reset: Add Spreadtrum SC27xx PMIC power off support

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Message-ID: <201802242020.dNuHpZl6%fengguang.wu@intel.com>
Date:   Sat, 24 Feb 2018 20:37:11 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Baolin Wang <baolin.wang@...aro.org>
Cc:     kbuild-all@...org, sre@...nel.org, broonie@...nel.org,
        baolin.wang@...aro.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org
Subject: Re: [PATCH v3] power: reset: Add Spreadtrum SC27xx PMIC power off
 support

Hi Baolin,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on power-supply/for-next]
[also build test ERROR on v4.16-rc2 next-20180223]
[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/Baolin-Wang/power-reset-Add-Spreadtrum-SC27xx-PMIC-power-off-support/20180224-195742
base:   https://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply.git for-next
config: sh-allmodconfig (attached as .config)
compiler: sh4-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
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
        make.cross ARCH=sh 

All errors (new ones prefixed by >>):

   drivers/power/reset/sc27xx-poweroff.c: In function 'sc27xx_poweroff_shutdown':
>> drivers/power/reset/sc27xx-poweroff.c:32:2: error: implicit declaration of function 'freeze_secondary_cpus' [-Werror=implicit-function-declaration]
     freeze_secondary_cpus(cpu);
     ^~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/freeze_secondary_cpus +32 drivers/power/reset/sc27xx-poweroff.c

    18	
    19	/*
    20	 * On Spreadtrum platform, we need power off system through external SC27xx
    21	 * series PMICs, and it is one similar SPI bus mapped by regmap to access PMIC,
    22	 * which is not fast io access.
    23	 *
    24	 * So before stopping other cores, we need release other cores' resource by
    25	 * taking cpus down to avoid racing regmap or spi mutex lock when poweroff
    26	 * system through PMIC.
    27	 */
    28	void sc27xx_poweroff_shutdown(void)
    29	{
    30		int cpu = smp_processor_id();
    31	
  > 32		freeze_secondary_cpus(cpu);
    33	}
    34	

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

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