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[S390] lockless idle time accounting

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Replace the spinlock used in the idle time accounting with a sequence
counter mechanism analog to seqlock.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky
2009-06-22 12:08:20 +02:00
parent 4f0076f77f
commit e98bbaafcd
3 changed files with 35 additions and 17 deletions
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2
arch/s390/include/asm/cputime.h
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@@ -178,7 +178,7 @@ cputime64_to_clock_t(cputime64_t cputime)
}
struct s390_idle_data {
spinlock_t lock;
unsigned int sequence;
unsigned long long idle_count;
unsigned long long idle_enter;
unsigned long long idle_time;