4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Andy Lutomirski <luto@xxxxxxxxxx> commit 8705d603edd49f1cff165cd3b7998f4c7f098d27 upstream. arch/x86/built-in.o: In function `arch_setup_additional_pages': (.text+0x587): undefined reference to `pvclock_pvti_cpu0_va' KVM_GUEST selects PARAVIRT_CLOCK, so we can make pvclock_pvti_cpu0_va depend on KVM_GUEST. Signed-off-by: Andy Lutomirski <luto@xxxxxxxxxx> Tested-by: Borislav Petkov <bp@xxxxxxxxx> Cc: Oleg Nesterov <oleg@xxxxxxxxxx> Cc: Kees Cook <keescook@xxxxxxxxxxxx> Link: http://lkml.kernel.org/r/444d38a9bcba832685740ea1401b569861d09a72.1451446564.git.luto@xxxxxxxxxx Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: James Dingwall <james@xxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- arch/x86/include/asm/pvclock.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/x86/include/asm/pvclock.h +++ b/arch/x86/include/asm/pvclock.h @@ -4,7 +4,7 @@ #include <linux/clocksource.h> #include <asm/pvclock-abi.h> -#ifdef CONFIG_PARAVIRT_CLOCK +#ifdef CONFIG_KVM_GUEST extern struct pvclock_vsyscall_time_info *pvclock_pvti_cpu0_va(void); #else static inline struct pvclock_vsyscall_time_info *pvclock_pvti_cpu0_va(void)