[peterz-queue:x86/core 12/14] arch/x86/hyperv/ivm.c:395:60: warning: non-void function does not return a value

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git x86/core
head:   a4f560f88ebe36d504463b63e648dbf3468f836c
commit: 34c83ece500350809581ca9365b38908a8973471 [12/14] x86,hyperv: Clean up hv_do_hypercall()
config: x86_64-buildonly-randconfig-002-20250430 (https://download.01.org/0day-ci/archive/20250430/202504300410.yCsLT0DE-lkp@intel.com/config)
compiler: clang version 20.1.2 (https://github.com/llvm/llvm-project 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250430/202504300410.yCsLT0DE-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/202504300410.yCsLT0DE-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> arch/x86/hyperv/ivm.c:395:60: warning: non-void function does not return a value [-Wreturn-type]
     395 | u64 hv_snp_hypercall(u64 control, u64 param1, u64 param2) {}
         |                                                            ^
   arch/x86/hyperv/ivm.c:445:60: warning: non-void function does not return a value [-Wreturn-type]
     445 | u64 hv_tdx_hypercall(u64 control, u64 param1, u64 param2) {}
         |                                                            ^
   arch/x86/hyperv/ivm.c:393:20: warning: unused function 'hv_ghcb_msr_write' [-Wunused-function]
     393 | static inline void hv_ghcb_msr_write(u64 msr, u64 value) {}
         |                    ^~~~~~~~~~~~~~~~~
   arch/x86/hyperv/ivm.c:394:20: warning: unused function 'hv_ghcb_msr_read' [-Wunused-function]
     394 | static inline void hv_ghcb_msr_read(u64 msr, u64 *value) {}
         |                    ^~~~~~~~~~~~~~~~
   arch/x86/hyperv/ivm.c:443:20: warning: unused function 'hv_tdx_msr_write' [-Wunused-function]
     443 | static inline void hv_tdx_msr_write(u64 msr, u64 value) {}
         |                    ^~~~~~~~~~~~~~~~
   arch/x86/hyperv/ivm.c:444:20: warning: unused function 'hv_tdx_msr_read' [-Wunused-function]
     444 | static inline void hv_tdx_msr_read(u64 msr, u64 *value) {}
         |                    ^~~~~~~~~~~~~~~
   6 warnings generated.


vim +395 arch/x86/hyperv/ivm.c

   391	
   392	#else
   393	static inline void hv_ghcb_msr_write(u64 msr, u64 value) {}
   394	static inline void hv_ghcb_msr_read(u64 msr, u64 *value) {}
 > 395	u64 hv_snp_hypercall(u64 control, u64 param1, u64 param2) {}
   396	#endif /* CONFIG_AMD_MEM_ENCRYPT */
   397	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki