[miquelraynal:nvmem-layouts-and-of-cleanup /35] drivers/of/module.c:62:6: warning: incompatible integer to pointer conversion assigning to 'char *' from 'int'

[miquelraynal:nvmem-layouts-and-of-cleanup /35] drivers/of/module.c:62:6: warning: incompatible integer to pointer conversion assigning to 'char *' from 'int'

[kernel test robot]

tree:   https://github.com/miquelraynal/linux-0day.git nvmem-layouts-and-of-cleanup
head:   4dbec5e07ef322a0458183244c9a11e92eebd61d
commit: 71414eadef0bb9ab9e3688498d0dc11f2739b5f2 [/35] of: Move the request module helper logic to module.c
config: i386-randconfig-a013-20230306 (https://download.01.org/0day-ci/archive/20230308/202303080602.l78Xfpcf-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/miquelraynal/linux-0day/commit/71414eadef0bb9ab9e3688498d0dc11f2739b5f2
        git remote add miquelraynal https://github.com/miquelraynal/linux-0day.git
        git fetch --no-tags miquelraynal nvmem-layouts-and-of-cleanup
        git checkout 71414eadef0bb9ab9e3688498d0dc11f2739b5f2
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/nvmem/ drivers/of/

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/202303080602.l78Xfpcf-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/of/module.c:62:8: error: implicit declaration of function 'kmalloc' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
           str = kmalloc(size, GFP_KERNEL);
                 ^
   drivers/of/module.c:62:8: note: did you mean 'mm_alloc'?
   include/linux/sched/mm.h:16:26: note: 'mm_alloc' declared here
   extern struct mm_struct *mm_alloc(void);
                            ^
>> drivers/of/module.c:62:6: warning: incompatible integer to pointer conversion assigning to 'char *' from 'int' [-Wint-conversion]
           str = kmalloc(size, GFP_KERNEL);
               ^ ~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/of/module.c:69:2: error: implicit declaration of function 'kfree' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
           kfree(str);
           ^
   drivers/of/module.c:69:2: note: did you mean 'kvfree'?
   include/linux/rcutiny.h:99:13: note: 'kvfree' declared here
   extern void kvfree(const void *addr);
               ^
   1 warning and 2 errors generated.


vim +62 drivers/of/module.c

    45	
    46	int of_request_module(struct device_node *np)
    47	{
    48		char *str;
    49		ssize_t size;
    50		int ret;
    51	
    52		if (!np)
    53			return -ENODEV;
    54	
    55		size = of_modalias(np, NULL, 0);
    56		if (size < 0)
    57			return size;
    58	
    59		/* Reserve an additional byte for the trailing '\0' */
    60		size++;
    61	
  > 62		str = kmalloc(size, GFP_KERNEL);

-- 
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https://github.com/intel/lkp-tests