[asahilinux:gpu/rust-wip 16/435] rust/helpers.c:688:9: error: implicit declaration of function 'of_node_is_root' is invalid in C99

[kernel test robot <lkp@intel.com>]

tree:   https://github.com/AsahiLinux/linux gpu/rust-wip
head:   6cb6d0b4fbbe5d99e82829e9c20618f85b5d890a
commit: ce99480622e25b44347eb5ffa86fabbcfe450ca9 [16/435] rust: of: Add initial OF node bindings
config: x86_64-rhel-8.3-rust (https://download.01.org/0day-ci/archive/20230121/202301211425.Bc2P8XPq-lkp@intel.com/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
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/AsahiLinux/linux/commit/ce99480622e25b44347eb5ffa86fabbcfe450ca9
        git remote add asahilinux https://github.com/AsahiLinux/linux
        git fetch --no-tags asahilinux gpu/rust-wip
        git checkout ce99480622e25b44347eb5ffa86fabbcfe450ca9
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 prepare

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 >>):

>> rust/helpers.c:688:9: error: implicit declaration of function 'of_node_is_root' is invalid in C99 [-Wimplicit-function-declaration]
>> rust/helpers.c:688:9: error: implicit declaration of function 'of_node_is_root' is invalid in C99 [-Wimplicit-function-declaration], err: true
   thread 'main' panicked at 'Unable to generate bindings: ()', /opt/cross/rustc-1.62.0-bindgen-0.56.0/cargo/registry/src/github.com-1ecc6299db9ec823/bindgen-0.56.0/src/main.rs:54:36
   note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
   make[2]: *** [rust/Makefile:343: rust/bindings/bindings_helpers_generated.rs] Error 1
   make[2]: *** Deleting file 'rust/bindings/bindings_helpers_generated.rs'
   make[2]: Target 'rust/' not remade because of errors.
   make[1]: *** [Makefile:1276: prepare] Error 2
   make: *** [Makefile:231: __sub-make] Error 2
   make: Target 'prepare' not remade because of errors.


vim +/of_node_is_root +688 rust/helpers.c

   685	
   686	bool rust_helper_of_node_is_root(const struct device_node *np)
   687	{
 > 688		return of_node_is_root(np);
   689	}
   690	EXPORT_SYMBOL_GPL(rust_helper_of_node_is_root);
   691	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests