From mboxrd@z Thu Jan 1 00:00:00 1970 From: robherring2@gmail.com (Rob Herring) Date: Tue, 1 Mar 2011 12:38:06 -0600 Subject: [PATCH] ARM: enable CONFIG_KTIME_SCALAR Message-ID: <1299004686-9281-1-git-send-email-robherring2@gmail.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Rob Herring Use straight 64-bit values as 64-bit operations are fairly efficient on ARM. Comparing the asm output with and without KTIME_SCALAR, using 64-bit math generates clearly better code. Comparing kernel/hrtimer.c .text size, it goes from 0x1414 to 0x119c with this change. Signed-off-by: Rob Herring --- arch/arm/Kconfig | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 166efa2..0efbea4 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -63,6 +63,10 @@ config GENERIC_CLOCKEVENTS_BROADCAST depends on GENERIC_CLOCKEVENTS default y if SMP +config KTIME_SCALAR + bool + default y + config HAVE_TCM bool select GENERIC_ALLOCATOR -- 1.7.1