arch/x86/kernel/cpu/amd.c:1289:6: warning: no previous prototype for function 'amd_check_microcode'

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   1c59d383390f970b891b503b7f79b63a02db2ec5
commit: 522b1d69219d8f083173819fde04f994aa051a98 x86/cpu/amd: Add a Zenbleed fix
date:   6 weeks ago
config: i386-allnoconfig (https://download.01.org/0day-ci/archive/20230829/202308291220.DOn00Y1A-lkp@xxxxxxxxx/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230829/202308291220.DOn00Y1A-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202308291220.DOn00Y1A-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

>> fs/open.c:1167: warning: Function parameter or member 'real_path' not described in 'backing_file_open'
   fs/open.c:1561: warning: expecting prototype for close_range(). Prototype was for sys_close_range() instead
--
>> fs/namespace.c:3046: warning: Function parameter or member 'mp' not described in 'can_move_mount_beneath'
--
>> arch/x86/kernel/cpu/amd.c:1289:6: warning: no previous prototype for function 'amd_check_microcode' [-Wmissing-prototypes]
   void amd_check_microcode(void)
        ^
   arch/x86/kernel/cpu/amd.c:1289:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void amd_check_microcode(void)
   ^
   static 
   1 warning generated.
--
>> arch/x86/kernel/cpu/mtrr/generic.c:434: warning: Function parameter or member 'var' not described in 'mtrr_overwrite_state'
>> arch/x86/kernel/cpu/mtrr/generic.c:434: warning: Function parameter or member 'num_var' not described in 'mtrr_overwrite_state'
>> arch/x86/kernel/cpu/mtrr/generic.c:434: warning: Function parameter or member 'def_type' not described in 'mtrr_overwrite_state'
   arch/x86/kernel/cpu/mtrr/generic.c:504: warning: Function parameter or member 'start' not described in 'mtrr_type_lookup'
   arch/x86/kernel/cpu/mtrr/generic.c:504: warning: Function parameter or member 'end' not described in 'mtrr_type_lookup'
   arch/x86/kernel/cpu/mtrr/generic.c:504: warning: Function parameter or member 'uniform' not described in 'mtrr_type_lookup'
--
>> fs/exportfs/expfs.c:395: warning: Function parameter or member 'parent' not described in 'exportfs_encode_inode_fh'


vim +/amd_check_microcode +1289 arch/x86/kernel/cpu/amd.c

  1288	
> 1289	void amd_check_microcode(void)

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