From: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
The core fix was applied in
commit a63b03e2d2477586440741677ecac45bcf28d7b1
Author: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Date: Tue Jan 6 10:29:35 2015 +0000
mutex: Always clear owner field upon mutex_unlock()
(note the absence of stable@ tag)
so we can now revert our band-aid commit 226e5ae9e5f910 for -next.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_gem.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 0a074bc..b50a2b4 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -5213,7 +5213,7 @@ static bool mutex_is_locked_by(struct mutex *mutex, struct task_struct *task)
if (!mutex_is_locked(mutex))
return false;
-#if defined(CONFIG_SMP) && !defined(CONFIG_DEBUG_MUTEXES)
+#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_MUTEXES)
return mutex->owner == task;
#else
/* Since UP may be pre-empted, we cannot assume that we own the lock */
--
1.9.3
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