We get a warning when build kernel W=1: arch/x86/kvm/vmx/vmx.c:6365:6: warning: no previous prototype for ‘vmx_update_host_rsp’ [-Wmissing-prototypes] void vmx_update_host_rsp(struct vcpu_vmx *vmx, unsigned long host_rsp) Add the missing declaration to fix this. Signed-off-by: Yi Wang <wang.yi59@xxxxxxxxxx> --- arch/x86/kvm/vmx/vmx.h | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/kvm/vmx/vmx.h b/arch/x86/kvm/vmx/vmx.h index f879529..9cd72de 100644 --- a/arch/x86/kvm/vmx/vmx.h +++ b/arch/x86/kvm/vmx/vmx.h @@ -314,6 +314,7 @@ struct kvm_vmx { void vmx_set_virtual_apic_mode(struct kvm_vcpu *vcpu); struct shared_msr_entry *find_msr_entry(struct vcpu_vmx *vmx, u32 msr); void pt_update_intercept_for_msr(struct vcpu_vmx *vmx); +void vmx_update_host_rsp(struct vcpu_vmx *vmx, unsigned long host_rsp); #define POSTED_INTR_ON 0 #define POSTED_INTR_SN 1 -- 1.8.3.1