arch/sh/boot/compressed/misc.c:118:6: warning: no previous prototype for 'arch_ftrace_ops_list_func'

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

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   d2f38a3c6507b2520101f9a3807ed98f1bdc545a
commit: 17b251a290ba84a0c2c5c82df9596cb2e7207ca6 ftrace/sh: Add arch_ftrace_ops_list_func stub to have compressed image still link
date:   13 days ago
config: sh-buildonly-randconfig-r001-20211109 (attached as .config)
compiler: sh4-linux-gcc (GCC) 11.2.0
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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=17b251a290ba84a0c2c5c82df9596cb2e7207ca6
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 17b251a290ba84a0c2c5c82df9596cb2e7207ca6
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=sh 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   arch/sh/boot/compressed/misc.c:109:6: warning: no previous prototype for '__stack_chk_fail' [-Wmissing-prototypes]
     109 | void __stack_chk_fail(void)
         |      ^~~~~~~~~~~~~~~~
   arch/sh/boot/compressed/misc.c:115:6: warning: no previous prototype for 'ftrace_stub' [-Wmissing-prototypes]
     115 | void ftrace_stub(void)
         |      ^~~~~~~~~~~
>> arch/sh/boot/compressed/misc.c:118:6: warning: no previous prototype for 'arch_ftrace_ops_list_func' [-Wmissing-prototypes]
     118 | void arch_ftrace_ops_list_func(void)
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~
   arch/sh/boot/compressed/misc.c:128:6: warning: no previous prototype for 'decompress_kernel' [-Wmissing-prototypes]
     128 | void decompress_kernel(void)
         |      ^~~~~~~~~~~~~~~~~


vim +/arch_ftrace_ops_list_func +118 arch/sh/boot/compressed/misc.c

   113	
   114	/* Needed because vmlinux.lds.h references this */
   115	void ftrace_stub(void)
   116	{
   117	}
 > 118	void arch_ftrace_ops_list_func(void)
   119	{
   120	}
   121	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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