Patch "drm/i915: Update ifdeffery for mutex->owner" has been added to the 4.4-stable tree

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

    drm/i915: Update ifdeffery for mutex->owner

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
drm-i915-update-ifdeffery-for-mutex-owner.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 <[email protected]> know about it.

From: Chris Wilson <[email protected]>
Date: Mon, 11 Jul 2016 14:46:17 +0100
Subject: drm/i915: Update ifdeffery for mutex->owner

From: Chris Wilson <[email protected]>

commit b19240062722c39fa92c99f04cbfd93034625123 upstream.

In commit 7608a43d8f2e ("locking/mutexes: Use MUTEX_SPIN_ON_OWNER when appropriate") the owner field in the mutex was updated from being dependent upon CONFIG_SMP to using optimistic spin. Update our peek function to suite.

---
 drivers/gpu/drm/i915/i915_gem_shrinker.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -39,7 +39,7 @@ static bool mutex_is_locked_by(struct mu
 	if (!mutex_is_locked(mutex))
 		return false;
 
-#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_MUTEXES)
+#if defined(CONFIG_DEBUG_MUTEXES) || defined(CONFIG_MUTEX_SPIN_ON_OWNER)
 	return mutex->owner == task;
 #else
 	/* Since UP may be pre-empted, we cannot assume that we own the lock */

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/sched-fair-fix-cfs_rq-avg-tracking-underflow.patch queue-4.4/drm-i915-update-ifdeffery-for-mutex-owner.patch queue-4.4/locking-ww_mutex-report-recursive-ww_mutex-locking-early.patch