Hi Andy,

I love your patch! Yet something to improve:

[auto build test ERROR on pm/linux-next]
[cannot apply to v5.3 next-20190920]
[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/Andy-Shevchenko/ACPI-utils-Describe-function-parameters-in-kernel-doc/20190924-230504
base:   https://kernel.googlesource.com/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
config: ia64-allmodconfig (attached as .config)
compiler: ia64-linux-gcc (GCC) 7.4.0
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
        GCC_VERSION=7.4.0 make.cross ARCH=ia64 

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

All error/warnings (new ones prefixed by >>):

   In file included from include/linux/acpi.h:32:0,
                    from include/linux/i2c.h:13,
                    from drivers//media/radio/si4713/si4713.c:15:
>> include/acpi/acpi_bus.h:78:36: warning: 'struct acpi_device' declared inside parameter list will not be visible outside of this definition or declaration
    bool acpi_dev_hid_uid_match(struct acpi_device *adev,
                                       ^~~~~~~~~~~
--
   In file included from include/linux/acpi.h:32:0,
                    from drivers/acpi/utils.c:15:
>> include/acpi/acpi_bus.h:78:36: warning: 'struct acpi_device' declared inside parameter list will not be visible outside of this definition or declaration
    bool acpi_dev_hid_uid_match(struct acpi_device *adev,
                                       ^~~~~~~~~~~
>> drivers/acpi/utils.c:713:6: error: conflicting types for 'acpi_dev_hid_uid_match'
    bool acpi_dev_hid_uid_match(struct acpi_device *adev,
         ^~~~~~~~~~~~~~~~~~~~~~
   In file included from include/linux/acpi.h:32:0,
                    from drivers/acpi/utils.c:15:
   include/acpi/acpi_bus.h:78:6: note: previous declaration of 'acpi_dev_hid_uid_match' was here
    bool acpi_dev_hid_uid_match(struct acpi_device *adev,
         ^~~~~~~~~~~~~~~~~~~~~~
   In file included from include/linux/linkage.h:7:0,
                    from include/linux/kernel.h:8,
                    from drivers/acpi/utils.c:9:
   drivers/acpi/utils.c:727:15: error: conflicting types for 'acpi_dev_hid_uid_match'
    EXPORT_SYMBOL(acpi_dev_hid_uid_match);
                  ^
   include/linux/export.h:79:21: note: in definition of macro '___EXPORT_SYMBOL'
     extern typeof(sym) sym;      \
                        ^~~
>> drivers/acpi/utils.c:727:1: note: in expansion of macro 'EXPORT_SYMBOL'
    EXPORT_SYMBOL(acpi_dev_hid_uid_match);
    ^~~~~~~~~~~~~
   In file included from include/linux/acpi.h:32:0,
                    from drivers/acpi/utils.c:15:
   include/acpi/acpi_bus.h:78:6: note: previous declaration of 'acpi_dev_hid_uid_match' was here
    bool acpi_dev_hid_uid_match(struct acpi_device *adev,
         ^~~~~~~~~~~~~~~~~~~~~~
--
   In file included from include/linux/acpi.h:32:0,
                    from drivers/cpufreq/ia64-acpi-cpufreq.c:24:
>> include/acpi/acpi_bus.h:78:36: warning: 'struct acpi_device' declared inside parameter list will not be visible outside of this definition or declaration
    bool acpi_dev_hid_uid_match(struct acpi_device *adev,
                                       ^~~~~~~~~~~
   drivers/cpufreq/ia64-acpi-cpufreq.c: In function 'processor_set_pstate':
   <command-line>:0:16: warning: format '%lx' expects argument of type 'long unsigned int', but argument 4 has type 's64 {aka long long int}' [-Wformat=]
   drivers/cpufreq/ia64-acpi-cpufreq.c:12:21: note: in expansion of macro 'KBUILD_MODNAME'
    #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
                        ^~~~~~~~~~~~~~
   include/linux/dynamic_debug.h:125:15: note: in expansion of macro 'pr_fmt'
      func(&id, ##__VA_ARGS__);  \
                  ^~~~~~~~~~~
   include/linux/dynamic_debug.h:143:2: note: in expansion of macro '__dynamic_func_call'
     __dynamic_func_call(__UNIQUE_ID(ddebug), fmt, func, ##__VA_ARGS__)
     ^~~~~~~~~~~~~~~~~~~
   include/linux/dynamic_debug.h:153:2: note: in expansion of macro '_dynamic_func_call'
     _dynamic_func_call(fmt, __dynamic_pr_debug,  \
     ^~~~~~~~~~~~~~~~~~
   include/linux/printk.h:336:2: note: in expansion of macro 'dynamic_pr_debug'
     dynamic_pr_debug(fmt, ##__VA_ARGS__)
     ^~~~~~~~~~~~~~~~
   drivers/cpufreq/ia64-acpi-cpufreq.c:57:3: note: in expansion of macro 'pr_debug'
      pr_debug("Failed to set freq to 0x%x, with error 0x%lx\n",
      ^~~~~~~~
   drivers/cpufreq/ia64-acpi-cpufreq.c: In function 'processor_get_pstate':
   <command-line>:0:16: warning: format '%lx' expects argument of type 'long unsigned int', but argument 3 has type 's64 {aka long long int}' [-Wformat=]
   drivers/cpufreq/ia64-acpi-cpufreq.c:12:21: note: in expansion of macro 'KBUILD_MODNAME'
    #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
                        ^~~~~~~~~~~~~~
   include/linux/dynamic_debug.h:125:15: note: in expansion of macro 'pr_fmt'
      func(&id, ##__VA_ARGS__);  \
                  ^~~~~~~~~~~
   include/linux/dynamic_debug.h:143:2: note: in expansion of macro '__dynamic_func_call'
     __dynamic_func_call(__UNIQUE_ID(ddebug), fmt, func, ##__VA_ARGS__)
     ^~~~~~~~~~~~~~~~~~~
   include/linux/dynamic_debug.h:153:2: note: in expansion of macro '_dynamic_func_call'
     _dynamic_func_call(fmt, __dynamic_pr_debug,  \
     ^~~~~~~~~~~~~~~~~~
   include/linux/printk.h:336:2: note: in expansion of macro 'dynamic_pr_debug'
     dynamic_pr_debug(fmt, ##__VA_ARGS__)
     ^~~~~~~~~~~~~~~~
   drivers/cpufreq/ia64-acpi-cpufreq.c:79:3: note: in expansion of macro 'pr_debug'
      pr_debug("Failed to get current freq with "
      ^~~~~~~~
--
   In file included from include/linux/acpi.h:32:0,
                    from drivers//acpi/utils.c:15:
>> include/acpi/acpi_bus.h:78:36: warning: 'struct acpi_device' declared inside parameter list will not be visible outside of this definition or declaration
    bool acpi_dev_hid_uid_match(struct acpi_device *adev,
                                       ^~~~~~~~~~~
   drivers//acpi/utils.c:713:6: error: conflicting types for 'acpi_dev_hid_uid_match'
    bool acpi_dev_hid_uid_match(struct acpi_device *adev,
         ^~~~~~~~~~~~~~~~~~~~~~
   In file included from include/linux/acpi.h:32:0,
                    from drivers//acpi/utils.c:15:
   include/acpi/acpi_bus.h:78:6: note: previous declaration of 'acpi_dev_hid_uid_match' was here
    bool acpi_dev_hid_uid_match(struct acpi_device *adev,
         ^~~~~~~~~~~~~~~~~~~~~~
   In file included from include/linux/linkage.h:7:0,
                    from include/linux/kernel.h:8,
                    from drivers//acpi/utils.c:9:
   drivers//acpi/utils.c:727:15: error: conflicting types for 'acpi_dev_hid_uid_match'
    EXPORT_SYMBOL(acpi_dev_hid_uid_match);
                  ^
   include/linux/export.h:79:21: note: in definition of macro '___EXPORT_SYMBOL'
     extern typeof(sym) sym;      \
                        ^~~
   drivers//acpi/utils.c:727:1: note: in expansion of macro 'EXPORT_SYMBOL'
    EXPORT_SYMBOL(acpi_dev_hid_uid_match);
    ^~~~~~~~~~~~~
   In file included from include/linux/acpi.h:32:0,
                    from drivers//acpi/utils.c:15:
   include/acpi/acpi_bus.h:78:6: note: previous declaration of 'acpi_dev_hid_uid_match' was here
    bool acpi_dev_hid_uid_match(struct acpi_device *adev,
         ^~~~~~~~~~~~~~~~~~~~~~
--
   In file included from include/linux/acpi.h:32:0,
                    from drivers//cpufreq/ia64-acpi-cpufreq.c:24:
>> include/acpi/acpi_bus.h:78:36: warning: 'struct acpi_device' declared inside parameter list will not be visible outside of this definition or declaration
    bool acpi_dev_hid_uid_match(struct acpi_device *adev,
                                       ^~~~~~~~~~~
   drivers//cpufreq/ia64-acpi-cpufreq.c: In function 'processor_set_pstate':
   <command-line>:0:16: warning: format '%lx' expects argument of type 'long unsigned int', but argument 4 has type 's64 {aka long long int}' [-Wformat=]
   drivers//cpufreq/ia64-acpi-cpufreq.c:12:21: note: in expansion of macro 'KBUILD_MODNAME'
    #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
                        ^~~~~~~~~~~~~~
   include/linux/dynamic_debug.h:125:15: note: in expansion of macro 'pr_fmt'
      func(&id, ##__VA_ARGS__);  \
                  ^~~~~~~~~~~
   include/linux/dynamic_debug.h:143:2: note: in expansion of macro '__dynamic_func_call'
     __dynamic_func_call(__UNIQUE_ID(ddebug), fmt, func, ##__VA_ARGS__)
     ^~~~~~~~~~~~~~~~~~~
   include/linux/dynamic_debug.h:153:2: note: in expansion of macro '_dynamic_func_call'
     _dynamic_func_call(fmt, __dynamic_pr_debug,  \
     ^~~~~~~~~~~~~~~~~~
   include/linux/printk.h:336:2: note: in expansion of macro 'dynamic_pr_debug'
     dynamic_pr_debug(fmt, ##__VA_ARGS__)
     ^~~~~~~~~~~~~~~~
   drivers//cpufreq/ia64-acpi-cpufreq.c:57:3: note: in expansion of macro 'pr_debug'
      pr_debug("Failed to set freq to 0x%x, with error 0x%lx\n",
      ^~~~~~~~
   drivers//cpufreq/ia64-acpi-cpufreq.c: In function 'processor_get_pstate':
   <command-line>:0:16: warning: format '%lx' expects argument of type 'long unsigned int', but argument 3 has type 's64 {aka long long int}' [-Wformat=]
   drivers//cpufreq/ia64-acpi-cpufreq.c:12:21: note: in expansion of macro 'KBUILD_MODNAME'
    #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
                        ^~~~~~~~~~~~~~
   include/linux/dynamic_debug.h:125:15: note: in expansion of macro 'pr_fmt'
      func(&id, ##__VA_ARGS__);  \
                  ^~~~~~~~~~~
   include/linux/dynamic_debug.h:143:2: note: in expansion of macro '__dynamic_func_call'
     __dynamic_func_call(__UNIQUE_ID(ddebug), fmt, func, ##__VA_ARGS__)
     ^~~~~~~~~~~~~~~~~~~
   include/linux/dynamic_debug.h:153:2: note: in expansion of macro '_dynamic_func_call'
     _dynamic_func_call(fmt, __dynamic_pr_debug,  \
     ^~~~~~~~~~~~~~~~~~
   include/linux/printk.h:336:2: note: in expansion of macro 'dynamic_pr_debug'
     dynamic_pr_debug(fmt, ##__VA_ARGS__)
     ^~~~~~~~~~~~~~~~
   drivers//cpufreq/ia64-acpi-cpufreq.c:79:3: note: in expansion of macro 'pr_debug'
      pr_debug("Failed to get current freq with "
      ^~~~~~~~
--
   In file included from include/linux/acpi.h:32:0,
                    from include/linux/i2c.h:13,
                    from include/media/dvb_frontend.h:38,
                    from drivers/media/tuners/mxl5005s.c:66:
>> include/acpi/acpi_bus.h:78:36: warning: 'struct acpi_device' declared inside parameter list will not be visible outside of this definition or declaration
    bool acpi_dev_hid_uid_match(struct acpi_device *adev,
                                       ^~~~~~~~~~~
   drivers/media/tuners/mxl5005s.c: In function 'MXL5005_ControlInit.isra.2':
   drivers/media/tuners/mxl5005s.c:1660:1: warning: the frame size of 4448 bytes is larger than 2048 bytes [-Wframe-larger-than=]
    }
    ^
--
   In file included from include/linux/acpi.h:32:0,
                    from include/linux/i2c.h:13,
                    from include/media/dvb_frontend.h:38,
                    from drivers//media/tuners/mxl5005s.c:66:
>> include/acpi/acpi_bus.h:78:36: warning: 'struct acpi_device' declared inside parameter list will not be visible outside of this definition or declaration
    bool acpi_dev_hid_uid_match(struct acpi_device *adev,
                                       ^~~~~~~~~~~
   drivers//media/tuners/mxl5005s.c: In function 'MXL5005_ControlInit.isra.2':
   drivers//media/tuners/mxl5005s.c:1660:1: warning: the frame size of 4448 bytes is larger than 2048 bytes [-Wframe-larger-than=]
    }
    ^

vim +/acpi_dev_hid_uid_match +713 drivers/acpi/utils.c

   703	
   704	/**
   705	 * acpi_dev_hid_uid_match - Match device by supplied HID and UID
   706	 * @adev: ACPI device to match.
   707	 * @hid2: Hardware ID of the device.
   708	 * @uid2: Unique ID of the device, pass NULL to not check _UID.
   709	 *
   710	 * Matches HID and UID in @adev with given @hid2 and @uid2.
   711	 * Returns true if matches.
   712	 */
 > 713	bool acpi_dev_hid_uid_match(struct acpi_device *adev,
   714				    const char *hid2, const char *uid2)
   715	{
   716		const char *hid1 = acpi_device_hid(adev);
   717		const char *uid1 = acpi_device_uid(adev);
   718	
   719		if (strcmp(hid1, hid2))
   720			return false;
   721	
   722		if (!uid2)
   723			return true;
   724	
   725		return uid1 && !strcmp(uid1, uid2);
   726	}
 > 727	EXPORT_SYMBOL(acpi_dev_hid_uid_match);
   728	

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