[dcui-tdx:decui/upstream-tip/x86/tdx/v7-wip 7/15] arch/x86/hyperv/ivm.c:427: undefined reference to `__tdx_hypercall_ret'

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

tree:   https://github.com/dcui/tdx decui/upstream-tip/x86/tdx/v7-wip
head:   2ed5ddebd0892b9aba336de12ecfef74076d1ce9
commit: c95e14c94d53cbb21418b661eb397cee1c67dd24 [7/15] x86/hyperv: Support hypercalls for TDX guests
config: x86_64-rhel-8.3 (https://download.01.org/0day-ci/archive/20230617/202306171459.JCFAEPYe-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build):
        # https://github.com/dcui/tdx/commit/c95e14c94d53cbb21418b661eb397cee1c67dd24
        git remote add dcui-tdx https://github.com/dcui/tdx
        git fetch --no-tags dcui-tdx decui/upstream-tip/x86/tdx/v7-wip
        git checkout c95e14c94d53cbb21418b661eb397cee1c67dd24
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 olddefconfig
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash

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/202306171459.JCFAEPYe-lkp@intel.com/

All errors (new ones prefixed by >>):

   ld: vmlinux.o: in function `hv_tdx_hypercall':
>> arch/x86/hyperv/ivm.c:427: undefined reference to `__tdx_hypercall_ret'


vim +427 arch/x86/hyperv/ivm.c

   418	
   419	u64 hv_tdx_hypercall(u64 control, u64 param1, u64 param2)
   420	{
   421		struct tdx_hypercall_args args = { };
   422	
   423		args.r10 = control;
   424		args.rdx = param1;
   425		args.r8  = param2;
   426	
 > 427		(void)__tdx_hypercall_ret(&args);

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