[3.8.y.z extended stable] Patch "arm64: vdso: update wtm fields for CLOCK_MONOTONIC_COARSE" has been added to staging queue

[Kamal Mostafa]

This is a note to let you know that I have just added a patch titled

    arm64: vdso: update wtm fields for CLOCK_MONOTONIC_COARSE

to the linux-3.8.y-queue branch of the 3.8.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.8.y-queue

This patch is scheduled to be released in version 3.8.13.19.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.8.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

------

>From bb3832602562f982570526511f2eca337d7559a7 Mon Sep 17 00:00:00 2001
From: Nathan Lynch <nathan_lynch at mentor.com>
Date: Mon, 3 Feb 2014 19:48:52 +0000
Subject: arm64: vdso: update wtm fields for CLOCK_MONOTONIC_COARSE

commit d4022a335271a48cce49df35d825897914fbffe3 upstream.

Update wall-to-monotonic fields in the VDSO data page
unconditionally.  These are used to service CLOCK_MONOTONIC_COARSE,
which is not guarded by use_syscall.

Signed-off-by: Nathan Lynch <nathan_lynch at mentor.com>
Acked-by: Will Deacon <will.deacon at arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas at arm.com>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 arch/arm64/kernel/vdso.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/kernel/vdso.c b/arch/arm64/kernel/vdso.c
index 6a389dc..0ea7a22 100644
--- a/arch/arm64/kernel/vdso.c
+++ b/arch/arm64/kernel/vdso.c
@@ -235,6 +235,8 @@ void update_vsyscall(struct timekeeper *tk)
 	vdso_data->use_syscall			= use_syscall;
 	vdso_data->xtime_coarse_sec		= xtime_coarse.tv_sec;
 	vdso_data->xtime_coarse_nsec		= xtime_coarse.tv_nsec;
+	vdso_data->wtm_clock_sec		= tk->wall_to_monotonic.tv_sec;
+	vdso_data->wtm_clock_nsec		= tk->wall_to_monotonic.tv_nsec;

 	if (!use_syscall) {
 		vdso_data->cs_cycle_last	= tk->clock->cycle_last;
@@ -242,8 +244,6 @@ void update_vsyscall(struct timekeeper *tk)
 		vdso_data->xtime_clock_nsec	= tk->xtime_nsec;
 		vdso_data->cs_mult		= tk->mult;
 		vdso_data->cs_shift		= tk->shift;
-		vdso_data->wtm_clock_sec	= tk->wall_to_monotonic.tv_sec;
-		vdso_data->wtm_clock_nsec	= tk->wall_to_monotonic.tv_nsec;
 	}

 	smp_wmb();
--
1.8.3.2