On Fri, Oct 31, 2014 at 05:41:48AM +0000, Wang, Yalin wrote: > This patch add bitrev.h file to support rbit instruction, > so that we can do bitrev operation by hardware. > Signed-off-by: Yalin Wang <yalin.wang@xxxxxxxxxxxxxx> > --- > arch/arm64/Kconfig | 1 + > arch/arm64/include/asm/bitrev.h | 21 +++++++++++++++++++++ > 2 files changed, 22 insertions(+) > create mode 100644 arch/arm64/include/asm/bitrev.h > > diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig > index 9532f8d..b1ec1dd 100644 > --- a/arch/arm64/Kconfig > +++ b/arch/arm64/Kconfig > @@ -35,6 +35,7 @@ config ARM64 > select HANDLE_DOMAIN_IRQ > select HARDIRQS_SW_RESEND > select HAVE_ARCH_AUDITSYSCALL > + select HAVE_ARCH_BITREVERSE > select HAVE_ARCH_JUMP_LABEL > select HAVE_ARCH_KGDB > select HAVE_ARCH_TRACEHOOK > diff --git a/arch/arm64/include/asm/bitrev.h b/arch/arm64/include/asm/bitrev.h > new file mode 100644 > index 0000000..706a209 > --- /dev/null > +++ b/arch/arm64/include/asm/bitrev.h > @@ -0,0 +1,21 @@ > +#ifndef __ASM_ARM64_BITREV_H > +#define __ASM_ARM64_BITREV_H Really minor nit, but we don't tend to include 'ARM64' in our header guards, so this should just be __ASM_BITREV_H. With that change, Acked-by: Will Deacon <will.deacon@xxxxxxx> Will -- 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>