Hi Artur,

[auto build test ERROR on v4.14-rc3]
[also build test ERROR on next-20170929]
[cannot apply to glikely/devicetree/next]
[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/Artur-Lorincz/Added-default-implementation-for-of_find_all_nodes-This-function-is-used-by-board-c-from-the-board-module-drivers-staging-board/20171009-014559
config: i386-randconfig-i1-201741 (attached as .config)
compiler: gcc-4.8 (Debian 4.8.4-1) 4.8.4
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   In file included from include/linux/iio/iio.h:16:0,
                    from drivers/iio/pressure/ms5611_core.c:17:
>> include/linux/of.h:541:35: error: static declaration of 'of_find_all_nodes' follows non-static declaration
    static inline struct device_node *of_find_all_nodes(struct device_node *prev)
                                      ^
   include/linux/of.h:222:28: note: previous declaration of 'of_find_all_nodes' was here
    extern struct device_node *of_find_all_nodes(struct device_node *prev);
                               ^
--
   In file included from drivers//of/base.c:27:0:
>> include/linux/of.h:541:35: error: static declaration of 'of_find_all_nodes' follows non-static declaration
    static inline struct device_node *of_find_all_nodes(struct device_node *prev)
                                      ^
   include/linux/of.h:222:28: note: previous declaration of 'of_find_all_nodes' was here
    extern struct device_node *of_find_all_nodes(struct device_node *prev);
                               ^
>> drivers//of/base.c:280:21: error: redefinition of 'of_find_all_nodes'
    struct device_node *of_find_all_nodes(struct device_node *prev)
                        ^
   In file included from drivers//of/base.c:27:0:
   include/linux/of.h:541:35: note: previous definition of 'of_find_all_nodes' was here
    static inline struct device_node *of_find_all_nodes(struct device_node *prev)
                                      ^
--
   In file included from drivers/of/base.c:27:0:
>> include/linux/of.h:541:35: error: static declaration of 'of_find_all_nodes' follows non-static declaration
    static inline struct device_node *of_find_all_nodes(struct device_node *prev)
                                      ^
   include/linux/of.h:222:28: note: previous declaration of 'of_find_all_nodes' was here
    extern struct device_node *of_find_all_nodes(struct device_node *prev);
                               ^
   drivers/of/base.c:280:21: error: redefinition of 'of_find_all_nodes'
    struct device_node *of_find_all_nodes(struct device_node *prev)
                        ^
   In file included from drivers/of/base.c:27:0:
   include/linux/of.h:541:35: note: previous definition of 'of_find_all_nodes' was here
    static inline struct device_node *of_find_all_nodes(struct device_node *prev)
                                      ^

vim +/of_find_all_nodes +541 include/linux/of.h

   540	
 > 541	static inline struct device_node *of_find_all_nodes(struct device_node *prev)
   542	{
   543		return NULL;
   544	}
   545	

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