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Subjectarch/arm64/kvm/hyp/nvhe/psci-relay.c:174:28: warning: no previous prototype for 'kvm_host_psci_cpu_entry'
Hi David,

FYI, the error/warning still remains.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: dbe69e43372212527abf48609aba7fc39a6daa27
commit: cdf367192766ad11a03e8d5098556be43b8eb6b0 KVM: arm64: Intercept host's CPU_ON SMCs
date: 7 months ago
config: arm64-buildonly-randconfig-r002-20210701 (attached as .config)
compiler: aarch64-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cdf367192766ad11a03e8d5098556be43b8eb6b0
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout cdf367192766ad11a03e8d5098556be43b8eb6b0
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> arch/arm64/kvm/hyp/nvhe/psci-relay.c:174:28: warning: no previous prototype for 'kvm_host_psci_cpu_entry' [-Wmissing-prototypes]
174 | asmlinkage void __noreturn kvm_host_psci_cpu_entry(bool is_cpu_on)
| ^~~~~~~~~~~~~~~~~~~~~~~


vim +/kvm_host_psci_cpu_entry +174 arch/arm64/kvm/hyp/nvhe/psci-relay.c

173
> 174 asmlinkage void __noreturn kvm_host_psci_cpu_entry(bool is_cpu_on)
175 {
176 struct psci_boot_args *boot_args;
177 struct kvm_cpu_context *host_ctxt;
178
179 host_ctxt = &this_cpu_ptr(hyp_symbol_addr(kvm_host_data))->host_ctxt;
180 boot_args = this_cpu_ptr(hyp_symbol_addr(cpu_on_args));
181
182 cpu_reg(host_ctxt, 0) = boot_args->r0;
183 write_sysreg_el2(boot_args->pc, SYS_ELR);
184 release_boot_args(boot_args);
185
186 __host_enter(host_ctxt);
187 }
188

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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