diff options
| author | Rob Herring <rob.herring@calxeda.com> | 2011-03-01 12:38:06 -0600 |
|---|---|---|
| committer | Jonas ABERG <jonas.aberg@stericsson.com> | 2011-04-20 11:12:33 +0200 |
| commit | d1d3aa968bb3de6844b4bbbd667a7eca548d9e42 (patch) | |
| tree | 6f399430aed4edd3f32da74cd1ac2fcf03594ec4 /arch | |
| parent | 2812cbfb40d8b249c229762addb831b04135825f (diff) | |
ARM: enable CONFIG_KTIME_SCALAR
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.
ST-Ericsson ID: 329353
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
Change-Id: Ic9d31ff64d7c60354f85055e3a74efd84d447e7f
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/21192
Reviewed-by: Jonas ABERG <jonas.aberg@stericsson.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/Kconfig | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 24374e716f5..d0d8bd6b7f1 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -57,6 +57,10 @@ config GENERIC_CLOCKEVENTS_BROADCAST depends on GENERIC_CLOCKEVENTS default y if SMP && !LOCAL_TIMERS +config KTIME_SCALAR + bool + default y + config HAVE_TCM bool select GENERIC_ALLOCATOR |