[avpatel:riscv_pmem_v1 37/38] arch/riscv/mm/cacheflush.c:100:2: error: call to undeclared function 'for_each_of_cpu_node'; ISO C99 and later do not support implicit function declarations

[kernel test robot]

tree:   https://github.com/avpatel/linux.git riscv_pmem_v1
head:   cfb27bb3561d70cd5e00b71c5f817b7c4452ae71
commit: 2590647b8e45549f88977f6c2d87b9740e3df722 [37/38] RISC-V: Move riscv_init_cbom_blocksize() to cacheflush.c
config: riscv-randconfig-r042-20220825 (https://download.01.org/0day-ci/archive/20220827/202208272028.IwrNZ0Ur-lkp@xxxxxxxxx/config)
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project a2100daf12fb980a29fd1a9c85ccf8eaaaf79730)
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
        # install riscv cross compiling tool for clang build
        # apt-get install binutils-riscv64-linux-gnu
        # https://github.com/avpatel/linux/commit/2590647b8e45549f88977f6c2d87b9740e3df722
        git remote add avpatel https://github.com/avpatel/linux.git
        git fetch --no-tags avpatel riscv_pmem_v1
        git checkout 2590647b8e45549f88977f6c2d87b9740e3df722
        # 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=riscv SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

>> arch/riscv/mm/cacheflush.c:100:2: error: call to undeclared function 'for_each_of_cpu_node'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
           for_each_of_cpu_node(node) {
           ^
>> arch/riscv/mm/cacheflush.c:100:28: error: expected ';' after expression
           for_each_of_cpu_node(node) {
                                     ^
                                     ;
>> arch/riscv/mm/cacheflush.c:106:4: error: 'continue' statement not in loop statement
                           continue;
                           ^
   arch/riscv/mm/cacheflush.c:109:4: error: 'continue' statement not in loop statement
                           continue;
                           ^
>> arch/riscv/mm/cacheflush.c:112:9: error: call to undeclared function 'of_property_read_u32'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
                   ret = of_property_read_u32(node, "riscv,cbom-block-size", &val);
                         ^
   arch/riscv/mm/cacheflush.c:114:4: error: 'continue' statement not in loop statement
                           continue;
                           ^
   6 errors generated.


vim +/for_each_of_cpu_node +100 arch/riscv/mm/cacheflush.c

    92	
    93	#ifdef CONFIG_RISCV_ISA_ZICBOM
    94	void riscv_init_cbom_blocksize(void)
    95	{
    96		struct device_node *node;
    97		int ret;
    98		u32 val;
    99	
 > 100		for_each_of_cpu_node(node) {
   101			unsigned long hartid;
   102			int cbom_hartid;
   103	
   104			ret = riscv_of_processor_hartid(node, &hartid);
   105			if (ret)
 > 106				continue;
   107	
   108			if (hartid < 0)
   109				continue;
   110	
   111			/* set block-size for cbom extension if available */
 > 112			ret = of_property_read_u32(node, "riscv,cbom-block-size", &val);

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