linux-kernel - [chenxing:msc313_mainlining 53/62] drivers/rtc/rtc-msc313.c:54:19: error: implicit declaration of function 'readw'

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Date:   Tue, 26 Oct 2021 03:24:39 +0800
From:   kernel test robot <lkp@...el.com>
To:     Daniel Palmer <daniel@...f.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Romain Perier <romain.perier@...il.com>,
        Nobuhiro Iwamatsu <iwamatsu@...auri.org>
Subject: [chenxing:msc313_mainlining 53/62] drivers/rtc/rtc-msc313.c:54:19:
 error: implicit declaration of function 'readw'

tree:   git://github.com/linux-chenxing/linux.git msc313_mainlining
head:   00ca14821cbd3f21593b24fb75d0c1a1a4ad9a26
commit: fab8dc2356bfc1a76d65a839a3b3fb9173b497a8 [53/62] rtc: Add support for the MSTAR MSC313 RTC
config: sparc-randconfig-c004-20211025 (attached as .config)
compiler: sparc64-linux-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/linux-chenxing/linux/commit/fab8dc2356bfc1a76d65a839a3b3fb9173b497a8
        git remote add chenxing git://github.com/linux-chenxing/linux.git
        git fetch --no-tags chenxing msc313_mainlining
        git checkout fab8dc2356bfc1a76d65a839a3b3fb9173b497a8
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=sparc 

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

All errors (new ones prefixed by >>):

   drivers/rtc/rtc-msc313.c: In function 'msc313_rtc_read_alarm':
>> drivers/rtc/rtc-msc313.c:54:19: error: implicit declaration of function 'readw' [-Werror=implicit-function-declaration]
      54 |         seconds = readw(priv->rtc_base + REG_RTC_MATCH_VAL_L)
         |                   ^~~~~
   drivers/rtc/rtc-msc313.c: In function 'msc313_rtc_alarm_irq_enable':
>> drivers/rtc/rtc-msc313.c:75:9: error: implicit declaration of function 'writew' [-Werror=implicit-function-declaration]
      75 |         writew(reg, priv->rtc_base + REG_RTC_CTRL);
         |         ^~~~~~
   cc1: some warnings being treated as errors


vim +/readw +54 drivers/rtc/rtc-msc313.c

    48	
    49	static int msc313_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
    50	{
    51		struct msc313_rtc *priv = dev_get_drvdata(dev);
    52		unsigned long seconds;
    53	
  > 54		seconds = readw(priv->rtc_base + REG_RTC_MATCH_VAL_L)
    55				| (readw(priv->rtc_base + REG_RTC_MATCH_VAL_H) << 16);
    56	
    57		rtc_time64_to_tm(seconds, &alarm->time);
    58	
    59		if (!(readw(priv->rtc_base + REG_RTC_CTRL) & INT_MASK_BIT))
    60			alarm->enabled = 1;
    61	
    62		return 0;
    63	}
    64	
    65	static int msc313_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
    66	{
    67		struct msc313_rtc *priv = dev_get_drvdata(dev);
    68		u16 reg;
    69	
    70		reg = readw(priv->rtc_base + REG_RTC_CTRL);
    71		if (enabled)
    72			reg &= ~INT_MASK_BIT;
    73		else
    74			reg |= INT_MASK_BIT;
  > 75		writew(reg, priv->rtc_base + REG_RTC_CTRL);
    76		return 0;
    77	}
    78	

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

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