linux-kernel - [asahilinux:audio/testing 112/167] drivers/cpufreq/apple-soc-cpufreq.c:53:12: error: implicit declaration of function 'readq

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Message-ID: <202203130855.uw6cQQRl-lkp@intel.com>
Date:   Sun, 13 Mar 2022 08:38:57 +0800
From:   kernel test robot <lkp@...el.com>
To:     Hector Martin <marcan@...can.st>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org
Subject: [asahilinux:audio/testing 112/167]
 drivers/cpufreq/apple-soc-cpufreq.c:53:12: error: implicit declaration of
 function 'readq_relaxed' is invalid in C99

tree:   https://github.com/AsahiLinux/linux audio/testing
head:   878d09efcd811ce17adb15d9ee32a5b7130320b5
commit: 97012c133dff8f4ad7de4c8d34cf327567c8e3d8 [112/167] cpufreq: apple-soc: Add new driver to control Apple SoC CPU P-states
config: arm-buildonly-randconfig-r001-20220313 (https://download.01.org/0day-ci/archive/20220313/202203130855.uw6cQQRl-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 43f668b98e8d87290fc6bbf5ed13c3ab542e3497)
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
        # install arm cross compiling tool for clang build
        # apt-get install binutils-arm-linux-gnueabi
        # https://github.com/AsahiLinux/linux/commit/97012c133dff8f4ad7de4c8d34cf327567c8e3d8
        git remote add asahilinux https://github.com/AsahiLinux/linux
        git fetch --no-tags asahilinux audio/testing
        git checkout 97012c133dff8f4ad7de4c8d34cf327567c8e3d8
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash drivers/cpufreq/

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/cpufreq/apple-soc-cpufreq.c:53:12: error: implicit declaration of function 'readq_relaxed' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
           u64 reg = readq_relaxed(priv->reg_base + APPLE_CLUSTER_PSTATE);
                     ^
>> drivers/cpufreq/apple-soc-cpufreq.c:71:6: error: implicit declaration of function 'readq' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
           if (readq_poll_timeout_atomic(priv->reg_base + APPLE_CLUSTER_PSTATE, reg,
               ^
   include/linux/iopoll.h:165:28: note: expanded from macro 'readq_poll_timeout_atomic'
           readx_poll_timeout_atomic(readq, addr, val, cond, delay_us, timeout_us)
                                     ^
>> drivers/cpufreq/apple-soc-cpufreq.c:82:2: error: implicit declaration of function 'writeq_relaxed' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
           writeq_relaxed(reg, priv->reg_base + APPLE_CLUSTER_PSTATE);
           ^
   3 errors generated.


vim +/readq_relaxed +53 drivers/cpufreq/apple-soc-cpufreq.c

    48	
    49	static unsigned int apple_soc_cpufreq_get_rate(unsigned int cpu)
    50	{
    51		struct cpufreq_policy *policy = cpufreq_cpu_get_raw(cpu);
    52		struct apple_cpu_priv *priv = policy->driver_data;
  > 53		u64 reg = readq_relaxed(priv->reg_base + APPLE_CLUSTER_PSTATE);
    54		unsigned int pstate = FIELD_GET(APPLE_CLUSTER_PSTATE_DESIRED1, reg);
    55		unsigned int i;
    56	
    57		for (i = 0; policy->freq_table[i].frequency != CPUFREQ_TABLE_END; i++)
    58			if (policy->freq_table[i].driver_data == pstate)
    59				return policy->freq_table[i].frequency;
    60	
    61		dev_err(priv->cpu_dev, "could not find frequency for pstate %d\n", pstate);
    62		return 0;
    63	}
    64	
    65	static int apple_soc_cpufreq_set_target(struct cpufreq_policy *policy, unsigned int index)
    66	{
    67		struct apple_cpu_priv *priv = policy->driver_data;
    68		unsigned int pstate = policy->freq_table[index].driver_data;
    69		u64 reg;
    70	
  > 71		if (readq_poll_timeout_atomic(priv->reg_base + APPLE_CLUSTER_PSTATE, reg,
    72					      !(reg & APPLE_CLUSTER_PSTATE_BUSY), 2,
    73					      APPLE_CLUSTER_SWITCH_TIMEOUT)) {
    74			return -EIO;
    75		}
    76	
    77		reg &= ~(APPLE_CLUSTER_PSTATE_DESIRED1 | APPLE_CLUSTER_PSTATE_DESIRED2);
    78		reg |= FIELD_PREP(APPLE_CLUSTER_PSTATE_DESIRED1, pstate);
    79		reg |= FIELD_PREP(APPLE_CLUSTER_PSTATE_DESIRED2, pstate);
    80		reg |= APPLE_CLUSTER_PSTATE_SET;
    81	
  > 82		writeq_relaxed(reg, priv->reg_base + APPLE_CLUSTER_PSTATE);
    83	
    84		return 0;
    85	}
    86	

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