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clock_systimer: Replace critical section APIs with spinlock APIs. (64bit only)

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If SMP=n or SMP=y && SPINLOCK_IRQ=n, this works in the same way as before.
If SMP=y && SPINLOCK_IRQ=y, performance will be improved.

Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>
This commit is contained in:
Masayuki Ishikawa 2018-01-15 13:04:32 +09:00
parent 57b6dec74d
commit 0ecef4dbcb
1 changed files with 2 additions and 2 deletions
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4
sched/clock/clock_systimer.c
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@ -120,9 +120,9 @@ systime_t clock_systimer(void)
/* 64-bit accesses are not atomic on most architectures. */
flags = enter_critical_section();
flags = spin_lock_irqsave();
sample = g_system_timer;
leave_critical_section(flags);
spin_unlock_irqrestore(flags);
return sample;
# else /* CONFIG_SYSTEM_TIME64 */