[asahilinux:bits/210-gpu 54/104] rust/helpers.c:317:9: 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 bits/210-gpu
head:   4f5acd5f030d581ab273e65726beff36608128ff
commit: b2a2b9affe450f8e83893153aa98195a05804feb [54/104] rust: kernel: platform: Add Device.set_dma_masks()
config: x86_64-randconfig-a001-20230424 (https://download.01.org/0day-ci/archive/20230425/202304250119.VM2PDuTB-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/b2a2b9affe450f8e83893153aa98195a05804feb
        git remote add asahilinux https://github.com/AsahiLinux/linux
        git fetch --no-tags asahilinux bits/210-gpu
        git checkout b2a2b9affe450f8e83893153aa98195a05804feb
        # 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>
| Link: https://lore.kernel.org/oe-kbuild-all/202304250119.VM2PDuTB-lkp@intel.com/

All errors (new ones prefixed by >>):

>> rust/helpers.c:317:9: error: implicit declaration of function 'of_node_is_root' is invalid in C99 [-Wimplicit-function-declaration]
>> rust/helpers.c:317:9: 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-1.66.0-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:317: 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:1292: prepare] Error 2
   make: *** [Makefile:226: __sub-make] Error 2
   make: Target 'prepare' not remade because of errors.


vim +/of_node_is_root +317 rust/helpers.c

8d3466eeedc463 Asahi Lina 2023-02-16  314  
662203dc3516bf Asahi Lina 2022-10-22  315  bool rust_helper_of_node_is_root(const struct device_node *np)
662203dc3516bf Asahi Lina 2022-10-22  316  {
662203dc3516bf Asahi Lina 2022-10-22 @317  	return of_node_is_root(np);
662203dc3516bf Asahi Lina 2022-10-22  318  }
662203dc3516bf Asahi Lina 2022-10-22  319  EXPORT_SYMBOL_GPL(rust_helper_of_node_is_root);
662203dc3516bf Asahi Lina 2022-10-22  320  

:::::: The code at line 317 was first introduced by commit
:::::: 662203dc3516bfb8c6db8890df17b87c9e88553c rust: of: Add OF node abstraction

:::::: TO: Asahi Lina <lina@asahilina.net>
:::::: CC: Hector Martin <marcan@marcan.st>

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