linux-kernel - drivers/hv/mshv_common.c:224:6: warning: no previous prototype for 'hv_machine_power

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Message-ID: <202512101321.EaX2X9FD-lkp@intel.com>
Date: Wed, 10 Dec 2025 13:45:42 +0800
From: kernel test robot <lkp@...el.com>
To: Praveen K Paladugu <prapal@...ux.microsoft.com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
	Wei Liu <wei.liu@...nel.org>,
	Anatol Belski <anbelski@...ux.microsoft.com>,
	Easwar Hariharan <easwar.hariharan@...ux.microsoft.com>
Subject: drivers/hv/mshv_common.c:224:6: warning: no previous prototype for
 'hv_machine_power_off'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   c9b47175e9131118e6f221cc8fb81397d62e7c91
commit: 615a6e7d83f958e7ef3bc818e818f7c6433b4c2a mshv: Cleanly shutdown root partition with MSHV
date:   4 days ago
config: arm64-randconfig-001-20251210 (https://download.01.org/0day-ci/archive/20251210/202512101321.EaX2X9FD-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 14.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251210/202512101321.EaX2X9FD-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202512101321.EaX2X9FD-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/hv/mshv_common.c:210:6: warning: no previous prototype for 'hv_sleep_notifiers_register' [-Wmissing-prototypes]
     210 | void hv_sleep_notifiers_register(void)
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/hv/mshv_common.c:224:6: warning: no previous prototype for 'hv_machine_power_off' [-Wmissing-prototypes]
     224 | void hv_machine_power_off(void)
         |      ^~~~~~~~~~~~~~~~~~~~


vim +/hv_machine_power_off +224 drivers/hv/mshv_common.c

   219	
   220	/*
   221	 * Power off the machine by entering S5 sleep state via Hyper-V hypercall.
   222	 * This call does not return if successful.
   223	 */
 > 224	void hv_machine_power_off(void)
   225	{
   226		unsigned long flags;
   227		struct hv_input_enter_sleep_state *in;
   228	
   229		local_irq_save(flags);
   230		in = *this_cpu_ptr(hyperv_pcpu_input_arg);
   231		in->sleep_state = HV_SLEEP_STATE_S5;
   232	
   233		(void)hv_do_hypercall(HVCALL_ENTER_SLEEP_STATE, in, NULL);
   234		local_irq_restore(flags);
   235	
   236		/* should never reach here */
   237		BUG();
   238	

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