[android-common:android15-6.6 0/2] arch/arm64/kvm/hyp/nvhe/pkvm.c:1725:5: warning: no previous prototype for '__pkvm_register_guest_smc_handler'

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

Hi Sebastian,

FYI, the error/warning still remains.

tree:   https://android.googlesource.com/kernel/common android15-6.6
head:   5fdbbd61a3cbdca7ac1034dc16723bdbc7ece8cc
commit: 340ef6cb4081cb305235a059f1c142345ac1a71d [0/2] ANDROID: KVM: arm64: Add smc64 trap handling for protected guests
config: arm64-defconfig (https://download.01.org/0day-ci/archive/20260331/202603311207.TrsAxm4F-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 15.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260331/202603311207.TrsAxm4F-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/202603311207.TrsAxm4F-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> arch/arm64/kvm/hyp/nvhe/pkvm.c:1725:5: warning: no previous prototype for '__pkvm_register_guest_smc_handler' [-Wmissing-prototypes]
    1725 | int __pkvm_register_guest_smc_handler(bool (*cb)(struct arm_smccc_1_2_regs *,
         |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/__pkvm_register_guest_smc_handler +1725 arch/arm64/kvm/hyp/nvhe/pkvm.c

  1724	
> 1725	int __pkvm_register_guest_smc_handler(bool (*cb)(struct arm_smccc_1_2_regs *,
  1726							 struct arm_smccc_res *res,
  1727							 pkvm_handle_t handle),
  1728					      pkvm_handle_t handle)
  1729	{
  1730		int ret = -EINVAL;
  1731		struct pkvm_hyp_vm *vm;
  1732	
  1733		if (!cb)
  1734			return ret;
  1735	
  1736		hyp_read_lock(&vm_table_lock);
  1737		vm = get_vm_by_handle(handle);
  1738		if (vm)
  1739			ret = cmpxchg_release(&vm->smc_handler, NULL, cb) ? -EBUSY : 0;
  1740		hyp_read_unlock(&vm_table_lock);
  1741	
  1742		return ret;
  1743	}
  1744	

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