On Fri, Jan 09, 2015 at 08:40:56PM +0800, Wang, Yalin wrote: > Oh, I see, > How about change like this: > + select HAVE_ARCH_BITREVERSE if ((CPU_V7M || CPU_V7) && !CPU_V6 && !CPU_V6K) > I am not sure if I also need add some older CPU types like !CPU_ARM9TDMI && !CPU_ARM940T ? > > Another solution is: > + select HAVE_ARCH_BITREVERSE if ((CPU_32V7M || CPU_32V7) && !CPU_32V6 && !CPU_32V5 && !CPU_32V4 && !CPU_32V4T && !CPU_32V3) > > By the way, I am not clear about the difference between CPU_V6 and CPU_V6K, could you tell me? :) I think select HAVE_ARCH_BITREVERSE if (CPU_32v7M || CPU_32v7) && !CPU_32v6 is sufficient - we don't support mixing pre-v6 and v6+ CPU architectures into a single kernel. -- FTTC broadband for 0.8mile line: currently at 10.5Mbps down 400kbps up according to speedtest.net. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>