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Subject[intel-tdx:tdx/guest-rebased 55/133] arch/x86/kernel/tdx.c:224:5: warning: no previous prototype for 'tdx_hcall_set_notify_intr'
tree:   https://github.com/intel/tdx.git tdx/guest-rebased
head: e3995864d37c56f431c93fc3dc454d9c65f5e9ea
commit: eff3229d99a6ea4b75fa0656fca38ac6db67ca7d [55/133] x86/tdx: Add SetupEventNotifyInterrupt TDX hypercall support
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20220114/202201140147.8KQUVLdd-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/eff3229d99a6ea4b75fa0656fca38ac6db67ca7d
git remote add intel-tdx https://github.com/intel/tdx.git
git fetch --no-tags intel-tdx tdx/guest-rebased
git checkout eff3229d99a6ea4b75fa0656fca38ac6db67ca7d
# 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:224:5: warning: no previous prototype for 'tdx_hcall_set_notify_intr' [-Wmissing-prototypes]
224 | int tdx_hcall_set_notify_intr(u8 vector)
| ^~~~~~~~~~~~~~~~~~~~~~~~~


vim +/tdx_hcall_set_notify_intr +224 arch/x86/kernel/tdx.c

216
217 /*
218 * tdx_hcall_set_notify_intr() - Setup Event Notify Interrupt Vector.
219 *
220 * @vector : Vector address to be used for notification.
221 *
222 * return 0 on success or failure error number.
223 */
> 224 int tdx_hcall_set_notify_intr(u8 vector)
225 {
226 u64 ret;
227
228 /* Minimum vector value allowed is 32 */
229 if (vector < 32)
230 return -EINVAL;
231
232 /*
233 * Register callback vector address with VMM. More details
234 * about the ABI can be found in TDX Guest-Host-Communication
235 * Interface (GHCI), sec 3.5.
236 */
237 ret = _trace_tdx_hypercall(TDVMCALL_SETUP_NOTIFY_INTR, vector, 0, 0, 0,
238 NULL);
239
240 if (ret == TDVMCALL_SUCCESS)
241 return 0;
242 else if (ret == TDCALL_INVALID_OPERAND)
243 return -EINVAL;
244
245 return -EIO;
246 }
247

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

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