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sched: Fix fallback sched_clock()'s offset when using jiffies

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Account for the initial offset to the jiffy count.

[ Impact: fix printk timestamps on architectures using fallback sched_clock() ]

Signed-off-by: Ron Lee <ron@debian.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ron
2009-05-08 22:54:49 +09:30
committed by Ingo Molnar
parent 091bf7624d
commit 92d23f703c
1 changed files with 2 additions and 1 deletions
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3
kernel/sched_clock.c
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@@ -38,7 +38,8 @@
*/ */
unsigned long long __attribute__((weak)) sched_clock(void) unsigned long long __attribute__((weak)) sched_clock(void)
{ {
return (unsigned long long)jiffies * (NSEC_PER_SEC / HZ); return (unsigned long long)(jiffies - INITIAL_JIFFIES)
* (NSEC_PER_SEC / HZ);
} }
static __read_mostly int sched_clock_running; static __read_mostly int sched_clock_running;