[asahilinux:bits/220-tso 4/4] arch/arm64/kernel/cpufeature_impdef.c:12:6: warning: no previous prototype for function 'has_apple_feature'

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

tree:   https://github.com/AsahiLinux/linux bits/220-tso
head:   38015ad2af19088e66e0c81f7efd5a8b51814026
commit: 38015ad2af19088e66e0c81f7efd5a8b51814026 [4/4] arm64: Implement Apple IMPDEF TSO memory model control
config: arm64-randconfig-r011-20230604 (https://download.01.org/0day-ci/archive/20230605/202306050128.UF4gkCm6-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 4faf3aaf28226a4e950c103a14f6fc1d1fdabb1b)
reproduce (this is a W=1 build):
        mkdir -p ~/bin
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        # https://github.com/AsahiLinux/linux/commit/38015ad2af19088e66e0c81f7efd5a8b51814026
        git remote add asahilinux https://github.com/AsahiLinux/linux
        git fetch --no-tags asahilinux bits/220-tso
        git checkout 38015ad2af19088e66e0c81f7efd5a8b51814026
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=arm64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash arch/arm64/kernel/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202306050128.UF4gkCm6-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> arch/arm64/kernel/cpufeature_impdef.c:12:6: warning: no previous prototype for function 'has_apple_feature' [-Wmissing-prototypes]
   bool has_apple_feature(const struct arm64_cpu_capabilities *entry, int scope)
        ^
   arch/arm64/kernel/cpufeature_impdef.c:12:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   bool has_apple_feature(const struct arm64_cpu_capabilities *entry, int scope)
   ^
   static 
   arch/arm64/kernel/cpufeature_impdef.c:24:6: warning: no previous prototype for function 'has_tso_fixed' [-Wmissing-prototypes]
   bool has_tso_fixed(const struct arm64_cpu_capabilities *entry, int scope)
        ^
   arch/arm64/kernel/cpufeature_impdef.c:24:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   bool has_tso_fixed(const struct arm64_cpu_capabilities *entry, int scope)
   ^
   static 
   arch/arm64/kernel/cpufeature_impdef.c:59:13: warning: no previous prototype for function 'init_cpu_hwcaps_indirect_list_impdef' [-Wmissing-prototypes]
   void __init init_cpu_hwcaps_indirect_list_impdef(void)
               ^
   arch/arm64/kernel/cpufeature_impdef.c:59:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void __init init_cpu_hwcaps_indirect_list_impdef(void)
   ^
   static 
   3 warnings generated.


vim +/has_apple_feature +12 arch/arm64/kernel/cpufeature_impdef.c

    11	
  > 12	bool has_apple_feature(const struct arm64_cpu_capabilities *entry, int scope)
    13	{
    14		u64 val;
    15		WARN_ON(scope != SCOPE_SYSTEM);
    16	
    17		if (read_cpuid_implementor() != ARM_CPU_IMP_APPLE)
    18			return false;
    19	
    20		val = read_sysreg(aidr_el1);
    21		return feature_matches(val, entry);
    22	}
    23	

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