This is a note to let you know that I've just added the patch titled

x86/vsdo: Fix build on PARAVIRT_CLOCK=y, KVM_GUEST=n

to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: x86-vsdo-fix-build-on-paravirt_clock-y-kvm_guest-n.patch and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From 8705d603edd49f1cff165cd3b7998f4c7f098d27 Mon Sep 17 00:00:00 2001

From: Andy Lutomirski luto@kernel.org Date: Tue, 29 Dec 2015 20:12:18 -0800 Subject: x86/vsdo: Fix build on PARAVIRT_CLOCK=y, KVM_GUEST=n

From: Andy Lutomirski luto@kernel.org

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@kernel.org Tested-by: Borislav Petkov bp@alien8.de Cc: Oleg Nesterov oleg@redhat.com Cc: Kees Cook keescook@chromium.org Link: http://lkml.kernel.org/r/444d38a9bcba832685740ea1401b569861d09a72.1451446564... Signed-off-by: Thomas Gleixner tglx@linutronix.de Cc: James Dingwall james@dingwall.me.uk Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- 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)

Patches currently in stable-queue which might be from luto@kernel.org are

queue-4.4/x86-vsdo-fix-build-on-paravirt_clock-y-kvm_guest-n.patch