[intel-tdx:guest-debug 4/4] arch/x86/coco/core.c:23:8: error: call to undeclared function 'get_option'; ISO C99 and later do not support implicit function declarations

[intel-tdx:guest-debug 4/4] arch/x86/coco/core.c:23:8: error: call to undeclared function 'get_option'; ISO C99 and later do not support implicit function declarations

[kernel test robot]

tree:   https://github.com/intel/tdx.git guest-debug
head:   90df00c4e488a8b5b6c837995706f3e101d75e9c
commit: 90df00c4e488a8b5b6c837995706f3e101d75e9c [4/4] x86/tdx: Add option to override prot values
config: x86_64-rhel-8.3-rust (https://download.01.org/0day-ci/archive/20240403/202404032332.b7k80Bz6-lkp@intel.com/config)
compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240403/202404032332.b7k80Bz6-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/202404032332.b7k80Bz6-lkp@intel.com/

All errors (new ones prefixed by >>):

>> arch/x86/coco/core.c:23:8: error: call to undeclared function 'get_option'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
      23 |        get_option(&arg, &x86_cc_attr_override);
         |        ^
   1 error generated.


vim +/get_option +23 arch/x86/coco/core.c

    20	
    21	static int __init x86_cc_attr_override_setup(char *arg)
    22	{
  > 23	       get_option(&arg, &x86_cc_attr_override);
    24	
    25	       return 1;
    26	}
    27	__setup("x86_cc_attr_override=", x86_cc_attr_override_setup);
    28	

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