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sched/irqtime: No need for preempt-safe accessors

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We can safely use the preempt-unsafe accessors for irqtime when we
flush its counters to kcpustat as IRQs are disabled at this time.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wanpeng Li <wanpeng.li@hotmail.com>
Link: http://lkml.kernel.org/r/1474849761-12678-2-git-send-email-fweisbec@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Frederic Weisbecker 2016-09-26 02:29:17 +02:00 committed by Ingo Molnar
parent b60205c7c5
commit f9094a6575
1 changed files with 2 additions and 2 deletions
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4
kernel/sched/cputime.c
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@ -82,7 +82,7 @@ static cputime_t irqtime_account_hi_update(cputime_t maxtime)
cputime_t irq_cputime;
local_irq_save(flags);
irq_cputime = nsecs_to_cputime64(this_cpu_read(cpu_hardirq_time)) -
irq_cputime = nsecs_to_cputime64(__this_cpu_read(cpu_hardirq_time)) -
cpustat[CPUTIME_IRQ];
irq_cputime = min(irq_cputime, maxtime);
cpustat[CPUTIME_IRQ] += irq_cputime;
@ -97,7 +97,7 @@ static cputime_t irqtime_account_si_update(cputime_t maxtime)
cputime_t softirq_cputime;
local_irq_save(flags);
softirq_cputime = nsecs_to_cputime64(this_cpu_read(cpu_softirq_time)) -
softirq_cputime = nsecs_to_cputime64(__this_cpu_read(cpu_softirq_time)) -
cpustat[CPUTIME_SOFTIRQ];
softirq_cputime = min(softirq_cputime, maxtime);
cpustat[CPUTIME_SOFTIRQ] += softirq_cputime;