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Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_request.h')
-rw-r--r--drivers/gpu/drm/i915/i915_gem_request.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_request.h b/drivers/gpu/drm/i915/i915_gem_request.h
index f6661f31a348..6dd83b172c7a 100644
--- a/drivers/gpu/drm/i915/i915_gem_request.h
+++ b/drivers/gpu/drm/i915/i915_gem_request.h
@@ -490,6 +490,9 @@ __i915_gem_active_get_rcu(const struct i915_gem_active *active)
* incremented) then the following read for rcu_access_pointer()
* must occur after the atomic operation and so confirm
* that this request is the one currently being tracked.
+ *
+ * The corresponding write barrier is part of
+ * rcu_assign_pointer().
*/
if (!request || request == rcu_access_pointer(active->request))
return rcu_pointer_handoff(request);