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[S390] nohz: optimize arch_needs_cpu()

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arch_needs_cpu() gets always executed on the current cpu. Therefore
the cpu parameter can be ignored it is possible to use __get_cpu_var()
instead of per_cpu() to access the per_cpu variable, which will
generate better code.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens 2011-01-05 12:47:55 +01:00 committed by Martin Schwidefsky
parent 90adac58d1
commit 37e8952174
1 changed files with 1 additions and 1 deletions
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arch/s390/include/asm/cputime.h
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@ -202,7 +202,7 @@ static inline void s390_idle_check(struct pt_regs *regs, __u64 int_clock,
static inline int s390_nohz_delay(int cpu)
{
return per_cpu(s390_idle, cpu).nohz_delay != 0;
return __get_cpu_var(s390_idle).nohz_delay != 0;
}
#define arch_needs_cpu(cpu) s390_nohz_delay(cpu)