drm/i915: Report purgeable status in buffer lists.

Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: NEric Anholt <eric@anholt.net>

drivers/gpu/drm/i915/i915_debugfs.c

@@ -97,13 +97,14 @@ static int i915_gem_object_list_info(struct seq_file *m, void *data)
 	{
 		struct drm_gem_object *obj = obj_priv->obj;
 
-		seq_printf(m, "    %p: %s %8zd %08x %08x %d %s",
+		seq_printf(m, "    %p: %s %8zd %08x %08x %d%s%s",
 			   obj,
 			   get_pin_flag(obj_priv),
 			   obj->size,
 			   obj->read_domains, obj->write_domain,
 			   obj_priv->last_rendering_seqno,
-			   obj_priv->dirty ? "dirty" : "");
+			   obj_priv->dirty ? " dirty" : "",
+			   obj_priv->madv == I915_MADV_DONTNEED ? " purgeable" : "");
 
 		if (obj->name)
 			seq_printf(m, " (name: %d)", obj->name);