On Wed, Feb 19, 2014 at 10:19:19PM -0800, Ben Widawsky wrote:
<snip>
> @@ -634,6 +641,85 @@ static void render_ring_cleanup(struct intel_ring_buffer
> *ring)
> ring->scratch.obj = NULL;
> }
>
> +static int gen8_rcs_signal(struct intel_ring_buffer *signaller,
> + unsigned int num_dwords)
> +{
> +#define MBOX_UPDATE_DWORDS 8
> + struct drm_device *dev = signaller->dev;
> + struct drm_i915_private *dev_priv = dev->dev_private;
> + struct intel_ring_buffer *waiter;
> + int i, ret, num_rings;
> +
> + num_rings = hweight_long(INTEL_INFO(dev)->ring_mask);
Again hweight32() would be enough.
<snip>
--
Ville Syrjälä
Intel OTC
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