--- zzzz-none-000/linux-2.6.39.4/drivers/gpu/drm/drm_pci.c	2011-08-03 19:43:28.000000000 +0000
+++ puma6-atom-6490-729/linux-2.6.39.4/drivers/gpu/drm/drm_pci.c	2021-11-10 13:38:14.000000000 +0000
@@ -251,7 +251,7 @@
 }
 
 
-static int drm_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *p)
+int drm_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *p)
 {
 	if ((p->busnum >> 8) != drm_get_pci_domain(dev) ||
 	    (p->busnum & 0xff) != dev->pdev->bus->number ||
@@ -292,7 +292,6 @@
 	.get_name = drm_pci_get_name,
 	.set_busid = drm_pci_set_busid,
 	.set_unique = drm_pci_set_unique,
-	.irq_by_busid = drm_pci_irq_by_busid,
 	.agp_init = drm_pci_agp_init,
 };