Re: [PATCH v4 3/3] hyperv: Cleanly shutdown root partition with MSHV

kernel test robot
2025-11-08T14:26:57Z

Hi Praveen,

kernel test robot noticed the following build warnings:

[auto build test WARNING on next-20251107]
[cannot apply to tip/x86/core linus/master v6.18-rc4 v6.18-rc3 v6.18-rc2 v6.18-rc4]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url: https://github.com/intel-lab-lkp/linux/commits/Praveen-K-Paladugu/hyperv-Add-definitions-for-MSHV-sleep-state-configuration/20251108-061825
base: next-20251107
patch link: https://lore.kernel.org/r/20251107221700.45957-4-prapal%40linux.microsoft.com
patch subject: [PATCH v4 3/3] hyperv: Cleanly shutdown root partition with MSHV
config: x86_64-randconfig-122-20251108 (https://download.01.org/0day-ci/archive/20251108/202511082249.JoKyyEEZ-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251108/202511082249.JoKyyEEZ-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/202511082249.JoKyyEEZ-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/hv/mshv_common.c:227:6: warning: variable 'status' set but not used [-Wunused-but-set-variable]
227 | u64 status;
| ^
1 warning generated.

vim +/status +227 drivers/hv/mshv_common.c

220
221 /*
222 * Power off the machine by entering S5 sleep state via Hyper-V hypercall.
223 * This call does not return if successful.
224 */
225 void hv_machine_power_off(void)
226 {
> 227 u64 status;
228 unsigned long flags;
229 struct hv_input_enter_sleep_state *in;
230
231 local_irq_save(flags);
232 in = *this_cpu_ptr(hyperv_pcpu_input_arg);
233 in->sleep_state = HV_SLEEP_STATE_S5;
234
235 status = hv_do_hypercall(HVCALL_ENTER_SLEEP_STATE, in, NULL);
236 local_irq_restore(flags);
237

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0-DAY CI Kernel Test Service