On Thu, Jul 01, 2021 at 12:27:58PM +0800, kernel test robot wrote: > > >> arch/x86/kvm/mmu/mmu.c:3119:6: error: no previous prototype for 'get_last_sptep_lockless' [-Werror=missing-prototypes] > 3119 | u64 *get_last_sptep_lockless(struct kvm_vcpu *vcpu, gpa_t gpa, u64 *spte) > | ^~~~~~~~~~~~~~~~~~~~~~~ get_last_sptep_lockless should be static. I will include a fix in the next version of this series.