| From d94aa877a44e2400a4bbdd0905109d7c0fc99030 Mon Sep 17 00:00:00 2001 |
| From: Wu Zhangjin <wuzhangjin@gmail.com> |
| Date: Wed, 10 Mar 2010 02:07:36 +0800 |
| Subject: [PATCH] RT: MIPS: make cpufreq support depends on !PREEMTP_RT |
| |
| commit d94aa877a44e2400a4bbdd0905109d7c0fc99030 in tip. |
| |
| The cpufreq support will change the cpu frequency dynamically, and also |
| for most of the MIPS timer's frequency are relative to the cpu |
| frequency, for example, in Loongson, the MIPS timer is half of the cpu |
| frequency, if the cpu frequency changes all the time, the MIPS timer |
| will be mussy. |
| |
| all of the above will make the whole system un-determinable, so, just |
| disable the cpufreq support when PREEMPT_RT is used. |
| |
| Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com> |
| |
| diff --git a/arch/mips/kernel/cpufreq/Kconfig b/arch/mips/kernel/cpufreq/Kconfig |
| index 58c601e..8a29c86 100644 |
| --- a/arch/mips/kernel/cpufreq/Kconfig |
| +++ b/arch/mips/kernel/cpufreq/Kconfig |
| @@ -9,6 +9,7 @@ config MIPS_CPUFREQ |
| bool |
| default y |
| depends on CPU_SUPPORTS_CPUFREQ && MIPS_EXTERNAL_TIMER |
| + depends on !PREEMPT_RT |
| |
| if MIPS_CPUFREQ |
| |
| -- |
| 1.7.1.1 |
| |
