diff --git a/include/linux/pci.h b/include/linux/pci.h
index 174e539..5da166e 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -955,6 +955,11 @@
 }
 #endif /* CONFIG_PCI_DOMAINS */
 
+/* some architectures require additional setup to direct VGA traffic */
+typedef int (*arch_set_vga_state_t)(struct pci_dev *pdev, bool decode,
+		      unsigned int command_bits, bool change_bridge);
+extern void pci_register_set_vga_state(arch_set_vga_state_t func);
+
 #else /* CONFIG_PCI is not enabled */
 
 /*