lkml.org 
[lkml]   [2010]   [Sep]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH] avoid second smp_processor_id() call in __touch_watchdog
Hello,

Per our previous conversation:

Andrew Morton wrote:
> Fair enough, although strictly speaking this should be done in a
> separate and later patch.
>


Avoid double smp_processor_id() call in __touch_watchdog (smp_processor_id()
itself and later call in __get_cpu_var())

Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>

---
diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index 7f9c3c5..03d97c5 100644
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -116,8 +116,7 @@ static unsigned long get_sample_period(void)
static void __touch_watchdog(void)
{
int this_cpu = smp_processor_id();
-
- __get_cpu_var(watchdog_touch_ts) = get_timestamp(this_cpu);
+ per_cpu(watchdog_touch_ts, this_cpu) = get_timestamp(this_cpu);
}

void touch_softlockup_watchdog(void)


\
 
 \ /
  Last update: 2010-09-22 11:03    [from the cache]
©2003-2011 Jasper Spaans