summaryrefslogtreecommitdiff
path: root/arch/mips/kernel/process.c
diff options
context:
space:
mode:
authorWu Zhangjin <wuzhangjin@gmail.com>2010-03-10 00:27:28 +0800
committerRalf Baechle <ralf@linux-mips.org>2010-04-12 17:26:10 +0100
commit7a7ac952d5217b2f568e5ef91ac39b572e166f24 (patch)
treefc7313875b4d5e8e833da49b35d8b0ea2959d508 /arch/mips/kernel/process.c
parentabe5b417fb4a52e9510fdb5a16e722e91bf89e92 (diff)
MIPS: Trace: Don't trace irqsoff for the idle process
Like x86 did in arch/x86/kernel/{process_32.c,process_64.c}, also don't trace irqsoff for idle. If there's no useful work to be done, we don't care about the irqsoff duration. If we trace the idle process, the max duration of irqsoff will be the idle time and make the irqsoff tracer useless. Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com> Cc: linux-mips@linux-mips.org Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Patchwork: http://patchwork.linux-mips.org/patch/1044/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel/process.c')
-rw-r--r--arch/mips/kernel/process.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c
index 463b71b90a00..99960940d4a4 100644
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c
@@ -63,8 +63,13 @@ void __noreturn cpu_idle(void)
smtc_idle_loop_hook();
#endif
- if (cpu_wait)
+
+ if (cpu_wait) {
+ /* Don't trace irqs off for idle */
+ stop_critical_timings();
(*cpu_wait)();
+ start_critical_timings();
+ }
}
#ifdef CONFIG_HOTPLUG_CPU
if (!cpu_online(cpu) && !cpu_isset(cpu, cpu_callin_map) &&