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Subject[intel-tdx:guest 54/144] arch/x86/kernel/tdx.c:225:5: warning: no previous prototype for 'tdx_hcall_set_notify_intr'
tree:   https://github.com/intel/tdx.git guest
head: 41fe88a1b3c28543f49fa6ed9e0e9b6650ed7614
commit: 7315ae7f753386e793da1941e073c4cb1112e767 [54/144] x86/tdx: Add SetupEventNotifyInterrupt TDX hypercall support
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20211208/202112080412.ewbt4zCb-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/7315ae7f753386e793da1941e073c4cb1112e767
git remote add intel-tdx https://github.com/intel/tdx.git
git fetch --no-tags intel-tdx guest
git checkout 7315ae7f753386e793da1941e073c4cb1112e767
# 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:225:5: warning: no previous prototype for 'tdx_hcall_set_notify_intr' [-Wmissing-prototypes]
225 | int tdx_hcall_set_notify_intr(u8 vector)
| ^~~~~~~~~~~~~~~~~~~~~~~~~


vim +/tdx_hcall_set_notify_intr +225 arch/x86/kernel/tdx.c

217
218 /*
219 * tdx_hcall_set_notify_intr() - Setup Event Notify Interrupt Vector.
220 *
221 * @vector : Vector address to be used for notification.
222 *
223 * return 0 on success or failure error number.
224 */
> 225 int tdx_hcall_set_notify_intr(u8 vector)
226 {
227 u64 ret;
228
229 /* Minimum vector value allowed is 32 */
230 if (vector < 32)
231 return -EINVAL;
232
233 /*
234 * Register callback vector address with VMM. More details
235 * about the ABI can be found in TDX Guest-Host-Communication
236 * Interface (GHCI), sec 3.5.
237 */
238 ret = _trace_tdx_hypercall(TDVMCALL_SETUP_NOTIFY_INTR, vector, 0, 0, 0,
239 NULL);
240
241 if (ret == TDVMCALL_SUCCESS)
242 return 0;
243 else if (ret == TDCALL_INVALID_OPERAND)
244 return -EINVAL;
245
246 return -EIO;
247 }
248

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

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