[intel-tdx:guest 104/144] arch/x86/kernel/tdx.c:491:14: warning: no previous prototype for 'tdx_write_msr'

[intel-tdx:guest 104/144] arch/x86/kernel/tdx.c:491:14: warning: no previous prototype for 'tdx_write_msr'

[kernel test robot]

tree:   https://github.com/intel/tdx.git guest
head:   41fe88a1b3c28543f49fa6ed9e0e9b6650ed7614
commit: 112748701181f3a7ab49d21bcf7920b983b05af2 [104/144] x86/tdx: Use direct paravirt call for wrmsrl
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20211208/202112080508.FqEbBAvi-lkp@intel.com/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel/tdx/commit/112748701181f3a7ab49d21bcf7920b983b05af2
        git remote add intel-tdx https://github.com/intel/tdx.git
        git fetch --no-tags intel-tdx guest
        git checkout 112748701181f3a7ab49d21bcf7920b983b05af2
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/kernel/

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/x86/kernel/tdx.c:268:5: warning: no previous prototype for 'tdx_hcall_set_notify_intr' [-Wmissing-prototypes]
     268 | int tdx_hcall_set_notify_intr(u8 vector)
         |     ^~~~~~~~~~~~~~~~~~~~~~~~~
>> arch/x86/kernel/tdx.c:491:14: warning: no previous prototype for 'tdx_write_msr' [-Wmissing-prototypes]
     491 | void notrace tdx_write_msr(unsigned int msr, u32 low, u32 high)
         |              ^~~~~~~~~~~~~


vim +/tdx_write_msr +491 arch/x86/kernel/tdx.c

   490	
 > 491	void notrace tdx_write_msr(unsigned int msr, u32 low, u32 high)
   492	{
   493		if (tdx_fast_tdcall_path_msr(msr))
   494			tdx_write_msr_safe(msr, low, high);
   495		else
   496			native_write_msr(msr, low, high);
   497	}
   498	

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