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tracing: Use sched_clock_cpu for trace_clock_global 

For systems with an unstable sched_clock, all cpu_clock() does is enable/
disable local irq during the call to sched_clock_cpu().  And for stable
systems they are same.

trace_clock_global() already disables interrupts, so it can call
sched_clock_cpu() directly.

Link: http://lkml.kernel.org/r/1356576585-28782-2-git-send-email-namhyung@kernel.org

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Namhyung Kim 2012-12-27 11:49:45 +09:00 committed by Steven Rostedt
parent ad964704ba
commit 5e67b51e3f
1 changed files with 1 additions and 1 deletions
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2
kernel/trace/trace_clock.c
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@ -84,7 +84,7 @@ u64 notrace trace_clock_global(void)
local_irq_save(flags);
this_cpu = raw_smp_processor_id();
now = cpu_clock(this_cpu);
now = sched_clock_cpu(this_cpu);
/*
* If in an NMI context then dont risk lockups and return the
* cpu_clock() time: