I could not find that file in the Documentation directory. I have one more question here. I read from a book that virt_to_phy is same as virt_to_bus for PCI devices. Is that True? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux.eu.org/Linux-MM/