]> git.baikalelectronics.ru Git - kernel.git/commit
projects / kernel.git / commit
? search:
summary | shortlog | log | commit | commitdiff | tree
(parent: 037e788) | patch
ARM: 6786/1: enable CONFIG_KTIME_SCALAR
authorRob Herring <rob.herring@calxeda.com>
Fri, 4 Mar 2011 22:51:59 +0000 (23:51 +0100)
committerRussell King <rmk+kernel@arm.linux.org.uk>
Wed, 9 Mar 2011 00:18:48 +0000 (00:18 +0000)
commita1fc92dc3e159a5fc53dd6b4b1387265c0293013
tree9bdf84901207c037d9d69c566d3a55dd2d5656ectree | snapshot
parent037e788870c78ee52a263dfda037418891f433ffcommit | diff
ARM: 6786/1: 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.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
arch/arm/Kconfig diff | blob | history
Linux Kernel Source Tree.