[android-common:android15-6.6 1/1] arch/arm64/kvm/hyp/nvhe/psci-relay.c:28:40: warning: declaration of 'enum pkvm_psci_notification' will not be visible outside of this function

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

Hi Quentin,

FYI, the error/warning still remains.

tree:   https://android.googlesource.com/kernel/common android15-6.6
head:   ed54096456f66d61be3303aef4a9485e4b53b762
commit: a6f552f0abf27513c692c5dcd8e470c9dbea8b53 [1/1] ANDROID: KVM: arm64: Notify pKVM modules of PSCI events
config: arm64-randconfig-2002-20261109 (https://download.01.org/0day-ci/archive/20261109/202611091937.2ow5eyX2-lkp@intel.com/config)
compiler: clang version 24.0.0git (https://github.com/llvm/llvm-project 0d1bc7245734217f06f9bb7e09f9dfd09d31361b)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261109/202611091937.2ow5eyX2-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/202611091937.2ow5eyX2-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from arch/arm64/kvm/hyp/nvhe/psci-relay.c:7:
   In file included from arch/arm64/include/asm/kvm_asm.h:50:
   In file included from include/linux/mm.h:2168:
   include/linux/vmstat.h:508:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     508 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     509 |                            item];
         |                            ~~~~
   include/linux/vmstat.h:515:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     515 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     516 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
   include/linux/vmstat.h:522:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     522 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
   include/linux/vmstat.h:527:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     527 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     528 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
>> arch/arm64/kvm/hyp/nvhe/psci-relay.c:28:40: warning: declaration of 'enum pkvm_psci_notification' will not be visible outside of this function [-Wvisibility]
      28 | static void (*pkvm_psci_notifier)(enum pkvm_psci_notification, struct user_pt_regs *);
         |                                        ^
   arch/arm64/kvm/hyp/nvhe/psci-relay.c:29:35: warning: declaration of 'enum pkvm_psci_notification' will not be visible outside of this function [-Wvisibility]
      29 | static void pkvm_psci_notify(enum pkvm_psci_notification notif, struct kvm_cpu_context *host_ctxt)
         |                                   ^
   arch/arm64/kvm/hyp/nvhe/psci-relay.c:29:58: error: variable has incomplete type 'enum pkvm_psci_notification'
      29 | static void pkvm_psci_notify(enum pkvm_psci_notification notif, struct kvm_cpu_context *host_ctxt)
         |                                                          ^
   arch/arm64/kvm/hyp/nvhe/psci-relay.c:29:35: note: forward declaration of 'enum pkvm_psci_notification'
      29 | static void pkvm_psci_notify(enum pkvm_psci_notification notif, struct kvm_cpu_context *host_ctxt)
         |                                   ^
   arch/arm64/kvm/hyp/nvhe/psci-relay.c:35:51: warning: declaration of 'enum pkvm_psci_notification' will not be visible outside of this function [-Wvisibility]
      35 | int __pkvm_register_psci_notifier(void (*cb)(enum pkvm_psci_notification, struct user_pt_regs *))
         |                                                   ^
   arch/arm64/kvm/hyp/nvhe/psci-relay.c:35:5: warning: no previous prototype for function '__pkvm_register_psci_notifier' [-Wmissing-prototypes]
      35 | int __pkvm_register_psci_notifier(void (*cb)(enum pkvm_psci_notification, struct user_pt_regs *))
         |     ^
   arch/arm64/kvm/hyp/nvhe/psci-relay.c:35:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
      35 | int __pkvm_register_psci_notifier(void (*cb)(enum pkvm_psci_notification, struct user_pt_regs *))
         | ^
         | static 
   arch/arm64/kvm/hyp/nvhe/psci-relay.c:191:19: error: use of undeclared identifier 'PKVM_PSCI_CPU_SUSPEND'
     191 |         pkvm_psci_notify(PKVM_PSCI_CPU_SUSPEND, host_ctxt);
         |                          ^~~~~~~~~~~~~~~~~~~~~
   arch/arm64/kvm/hyp/nvhe/psci-relay.c:223:19: error: use of undeclared identifier 'PKVM_PSCI_SYSTEM_SUSPEND'
     223 |         pkvm_psci_notify(PKVM_PSCI_SYSTEM_SUSPEND, host_ctxt);
         |                          ^~~~~~~~~~~~~~~~~~~~~~~~
   arch/arm64/kvm/hyp/nvhe/psci-relay.c:251:19: error: use of undeclared identifier 'PKVM_PSCI_CPU_ENTRY'
     251 |         pkvm_psci_notify(PKVM_PSCI_CPU_ENTRY, host_ctxt);
         |                          ^~~~~~~~~~~~~~~~~~~
   8 warnings and 4 errors generated.


vim +28 arch/arm64/kvm/hyp/nvhe/psci-relay.c

    27	
  > 28	static void (*pkvm_psci_notifier)(enum pkvm_psci_notification, struct user_pt_regs *);
    29	static void pkvm_psci_notify(enum pkvm_psci_notification notif, struct kvm_cpu_context *host_ctxt)
    30	{
    31		if (smp_load_acquire(&pkvm_psci_notifier))
    32			pkvm_psci_notifier(notif, &host_ctxt->regs);
    33	}
    34	

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