Hi Andy,

I love your patch! Yet something to improve:

[auto build test ERROR on soc/for-next]
[also build test ERROR on linus/master v6.0 next-20221005]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Andy-Shevchenko/device-property-Introduce-fwnode_device_is_compatible-helper/20221005-223919
base:   https://git.kernel.org/pub/scm/linux/kernel/git/soc/soc.git for-next
config: powerpc-allnoconfig
compiler: powerpc-linux-gcc (GCC) 12.1.0
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/intel-lab-lkp/linux/commit/b930d58084d15cbf92f0cd490ad05e843991bd8e
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Andy-Shevchenko/device-property-Introduce-fwnode_device_is_compatible-helper/20221005-223919
        git checkout b930d58084d15cbf92f0cd490ad05e843991bd8e
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash arch/powerpc/kernel/

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

All errors (new ones prefixed by >>):

   In file included from include/linux/of.h:22,
                    from arch/powerpc/kernel/cputable.c:15:
>> include/linux/property.h:54:6: error: no previous prototype for 'fwnode_device_is_compatible' [-Werror=missing-prototypes]
      54 | bool fwnode_device_is_compatible(const struct fwnode_handle *fwnode, const char *compat)
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/property.h: In function 'fwnode_device_is_compatible':
   include/linux/property.h:56:16: error: implicit declaration of function 'fwnode_property_match_string'; did you mean 'device_property_match_string'? [-Werror=implicit-function-declaration]
      56 |         return fwnode_property_match_string(fwnode, "compatible", compat) >= 0;
         |                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
         |                device_property_match_string
   cc1: all warnings being treated as errors


vim +/fwnode_device_is_compatible +54 include/linux/property.h

    36	
    37	bool device_property_present(struct device *dev, const char *propname);
    38	int device_property_read_u8_array(struct device *dev, const char *propname,
    39					  u8 *val, size_t nval);
    40	int device_property_read_u16_array(struct device *dev, const char *propname,
    41					   u16 *val, size_t nval);
    42	int device_property_read_u32_array(struct device *dev, const char *propname,
    43					   u32 *val, size_t nval);
    44	int device_property_read_u64_array(struct device *dev, const char *propname,
    45					   u64 *val, size_t nval);
    46	int device_property_read_string_array(struct device *dev, const char *propname,
    47					      const char **val, size_t nval);
    48	int device_property_read_string(struct device *dev, const char *propname,
    49					const char **val);
    50	int device_property_match_string(struct device *dev,
    51					 const char *propname, const char *string);
    52	
    53	bool fwnode_device_is_available(const struct fwnode_handle *fwnode);
  > 54	bool fwnode_device_is_compatible(const struct fwnode_handle *fwnode, const char *compat)
    55	{
    56		return fwnode_property_match_string(fwnode, "compatible", compat) >= 0;
    57	}
    58	

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