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sched_clock: Add local_clock() API and improve documentation

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For people who otherwise get to write: cpu_clock(smp_processor_id()),
there is now: local_clock().

Also, as per suggestion from Andrew, provide some documentation on
the various clock interfaces, and minimize the unsigned long long vs
u64 mess.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Jens Axboe <jaxboe@fusionio.com>
LKML-Reference: <1275052414.1645.52.camel@laptop>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra
2010-05-25 10:48:51 +02:00
committed by Ingo Molnar
parent 95ae3c59fa
commit c676329abb
8 changed files with 113 additions and 34 deletions
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2
kernel/lockdep.c
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@@ -146,7 +146,7 @@ static DEFINE_PER_CPU(struct lock_class_stats[MAX_LOCKDEP_KEYS],
static inline u64 lockstat_clock(void)
{
return cpu_clock(smp_processor_id());
return local_clock();
}
static int lock_point(unsigned long points[], unsigned long ip)