On Tue, Jul 05, 2016 at 01:53:03PM +1000, Stephen Rothwell wrote: > diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c > index d3502c0603e5..1f91f187b2a8 100644 > --- a/drivers/gpu/drm/i915/i915_gem.c > +++ b/drivers/gpu/drm/i915/i915_gem.c > @@ -3290,7 +3290,7 @@ i915_gem_retire_work_handler(struct work_struct *work) > * We do not need to do this test under locking as in the worst-case > * we queue the retire worker once too often. > */ > - if (lockless_dereference(dev_priv->gt.awake)) > + if (/*lockless_dereference*/(dev_priv->gt.awake)) > queue_delayed_work(dev_priv->wq, > &dev_priv->gt.retire_work, > round_jiffies_up_relative(HZ)); > diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c > index f6de8dd567a2..2c1926418691 100644 > --- a/drivers/gpu/drm/i915/i915_irq.c > +++ b/drivers/gpu/drm/i915/i915_irq.c > @@ -3095,7 +3095,7 @@ static void i915_hangcheck_elapsed(struct work_struct > *work) > if (!i915.enable_hangcheck) > return; > > - if (!lockless_dereference(dev_priv->gt.awake)) > + if (!/*lockless_dereference*/(dev_priv->gt.awake)) > return; > > /* As enabling the GPU requires fairly extensive mmio access,
Right, neither case appears to include a data dependency and thus lockless_dereference() seems misguided.
