[xinli-intel-fred-public:intel-lkp 10/33] arch/x86/hyperv/ivm.c:113:9: error: call to undeclared function 'native_rdmsrq'; ISO C99 and later do not support implicit function declarations

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

Hi Xin,

FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.

tree:   https://github.com/xinli-intel/linux-fred-public.git intel-lkp
head:   7847889af95a1a39c6e3e0ef6479df8b9505a17d
commit: d6194f8ae4246888ed7cafd9e11414724eb20c04 [10/33] x86/msr: Convert __rdmsr() uses to native_rdmsrq() uses
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20250420/202504201203.qe2AV3Ac-lkp@intel.com/config)
compiler: clang version 20.1.2 (https://github.com/llvm/llvm-project 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250420/202504201203.qe2AV3Ac-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/202504201203.qe2AV3Ac-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from arch/x86/hyperv/ivm.c:18:
   arch/x86/include/asm/mshyperv.h:307:9: error: call to undeclared function 'native_rdmsrq'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     307 |         return native_rdmsrq(reg);
         |                ^
>> arch/x86/hyperv/ivm.c:113:9: error: call to undeclared function 'native_rdmsrq'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     113 |         return native_rdmsrq(MSR_AMD64_SEV_ES_GHCB);
         |                ^
   arch/x86/hyperv/ivm.c:118:2: error: call to undeclared function 'native_wrmsrq'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     118 |         native_wrmsrq(MSR_AMD64_SEV_ES_GHCB, val);
         |         ^
   arch/x86/hyperv/ivm.c:321:15: error: call to undeclared function 'native_read_msr'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     321 |         vmsa->efer = native_read_msr(MSR_EFER);
         |                      ^
   4 errors generated.


vim +/native_rdmsrq +113 arch/x86/hyperv/ivm.c

   110	
   111	static inline u64 rd_ghcb_msr(void)
   112	{
 > 113		return native_rdmsrq(MSR_AMD64_SEV_ES_GHCB);
   114	}
   115	

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