[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:   308062b9b17efd95c1c98c7c2cf667f620492fce
commit: 308062b9b17efd95c1c98c7c2cf667f620492fce [4/4] arm64: Implement Apple IMPDEF TSO memory model control
config: arm64-randconfig-002-20231120 (https://download.01.org/0day-ci/archive/20231120/202311202018.ECg9m9He-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231120/202311202018.ECg9m9He-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311202018.ECg9m9He-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]
      12 | 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
      12 | 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]
      24 | 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
      24 | 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_cpucap_indirect_list_impdef' [-Wmissing-prototypes]
      59 | void __init init_cpucap_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
      59 | void __init init_cpucap_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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