On Mon, Oct 27, 2014 at 2:46 PM, Joe Perches <joe@xxxxxxxxxxx> wrote: > On Mon, 2014-10-27 at 14:37 +0800, Wang, Yalin wrote: >> this change add CONFIG_HAVE_ARCH_BITREVERSE config option, >> so that we can use arm/arm64 rbit instruction to do bitrev operation >> by hardware. I don't see the original patch in my inbox, so replying here. >> >> Signed-off-by: Yalin Wang <yalin.wang@xxxxxxxxxxxxxx> >> --- >> arch/arm/Kconfig | 1 + >> arch/arm/include/asm/bitrev.h | 21 +++++++++++++++++++++ >> arch/arm64/Kconfig | 1 + >> arch/arm64/include/asm/bitrev.h | 21 +++++++++++++++++++++ >> include/linux/bitrev.h | 9 +++++++++ >> lib/Kconfig | 9 +++++++++ >> lib/bitrev.c | 2 ++ >> 7 files changed, 64 insertions(+) >> create mode 100644 arch/arm/include/asm/bitrev.h >> create mode 100644 arch/arm64/include/asm/bitrev.h >> >> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig >> index 89c4b5c..426cbcc 100644 >> --- a/arch/arm/Kconfig >> +++ b/arch/arm/Kconfig >> @@ -16,6 +16,7 @@ config ARM >> select DCACHE_WORD_ACCESS if HAVE_EFFICIENT_UNALIGNED_ACCESS >> select GENERIC_ALLOCATOR >> select GENERIC_ATOMIC64 if (CPU_V7M || CPU_V6 || !CPU_32v6K || !AEABI) >> + select HAVE_ARCH_BITREVERSE if (CPU_V7M || CPU_V7) >> select GENERIC_CLOCKEVENTS_BROADCAST if SMP >> select GENERIC_IDLE_POLL_SETUP >> select GENERIC_IRQ_PROBE [...] >> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig >> index 9532f8d..263c28c 100644 >> --- a/arch/arm64/Kconfig >> +++ b/arch/arm64/Kconfig >> @@ -36,6 +36,7 @@ config ARM64 >> select HARDIRQS_SW_RESEND >> select HAVE_ARCH_AUDITSYSCALL >> select HAVE_ARCH_JUMP_LABEL >> + select HAVE_ARCH_BITREVERSE >> select HAVE_ARCH_KGDB >> select HAVE_ARCH_TRACEHOOK >> select HAVE_BPF_JIT The kconfig lists should be sorted. Rob -- 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>