int i915_emit_irq(drm_device_t * dev)
static int i915_emit_irq(drm_device_t * dev)
int i915_emit_irq(drm_device_t * dev){	drm_i915_private_t *dev_priv = dev->dev_private;	u32 ret;	RING_LOCALS;	i915_kernel_lost_context(dev);	DRM_DEBUG("%s\n", __FUNCTION__);	ret = dev_priv->counter;	BEGIN_LP_RING(2);	OUT_RING(0);	OUT_RING(GFX_OP_USER_INTERRUPT);	ADVANCE_LP_RING();	return ret;}