RedHat patch used in Fedora Core 13.

This patch prevents instantaneous crashes when starting Xorg.

Index: linux-2.6.33-rc7/drivers/gpu/drm/i915/i915_gem.c
===================================================================
--- linux-2.6.33-rc7.orig/drivers/gpu/drm/i915/i915_gem.c	2010-02-15 16:11:03.352204419 +0900
+++ linux-2.6.33-rc7/drivers/gpu/drm/i915/i915_gem.c	2010-02-19 12:32:55.802554946 +0900
@@ -3711,6 +3711,10 @@
 
 	mutex_lock(&dev->struct_mutex);
 
+	/* We don't get the flushing right for these chipsets, use the
+	 * big hamer for now to avoid random crashiness. */
+	wbinvd();
+
 	i915_verify_inactive(dev, __FILE__, __LINE__);
 
 	if (atomic_read(&dev_priv->mm.wedged)) {