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Subject[intel-tdx:guest-hardening-rebased 11/23] arch/x86/coco/tdx/tdx.c:297:14: warning: no previous prototype for 'tdx_write_msr'
tree:   https://github.com/intel/tdx.git guest-hardening-rebased
head: 64a4c4e66ca9cce1ca55de6d801f32284fbf7c8e
commit: d1a7216a37f68b347a3622a0c8498134d5cb8970 [11/23] x86/tdx: Use direct paravirt call for wrmsrl
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20220708/202207080723.aRk54tCZ-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-3) 11.3.0
reproduce (this is a W=1 build):
# https://github.com/intel/tdx/commit/d1a7216a37f68b347a3622a0c8498134d5cb8970
git remote add intel-tdx https://github.com/intel/tdx.git
git fetch --no-tags intel-tdx guest-hardening-rebased
git checkout d1a7216a37f68b347a3622a0c8498134d5cb8970
# save the config file
mkdir build_dir && cp config build_dir/.config
make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/coco/tdx/ arch/x86/mm/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> arch/x86/coco/tdx/tdx.c:297:14: warning: no previous prototype for 'tdx_write_msr' [-Wmissing-prototypes]
297 | void notrace tdx_write_msr(unsigned int msr, u32 low, u32 high)
| ^~~~~~~~~~~~~


vim +/tdx_write_msr +297 arch/x86/coco/tdx/tdx.c

296
> 297 void notrace tdx_write_msr(unsigned int msr, u32 low, u32 high)
298 {
299 struct tdx_hypercall_args args = {
300 .r10 = TDX_HYPERCALL_STANDARD,
301 .r11 = hcall_func(EXIT_REASON_MSR_WRITE),
302 .r12 = msr,
303 .r13 = (u64)high << 32 | low,
304 };
305
306 if (tdx_fast_tdcall_path_msr(msr))
307 __tdx_hypercall(&args, 0);
308 else
309 native_write_msr(msr, low, high);
310 }
311

--
0-DAY CI Kernel Test Service
https://01.org/lkp

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