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| author | Frederic Weisbecker <fweisbec@gmail.com> | 2016-09-26 02:29:18 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-09-30 11:46:39 +0200 |
| commit | 2810f611f908112ea1b30bc016d25205acb3d486 (patch) | |
| tree | 7d20a062428cfe75112c40b19cc94a499966f086 /kernel | |
| parent | f9094a65755df86ec931f47b781f68ea3095cb56 (diff) | |
| download | linux-2810f611f908112ea1b30bc016d25205acb3d486.tar.bz2 | |
sched/irqtime: Remove needless IRQs disablement on kcpustat update
The callers of the functions performing irqtime kcpustat updates have
IRQS disabled, no need to disable them again.
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/1474849761-12678-3-git-send-email-fweisbec@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched/cputime.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/kernel/sched/cputime.c b/kernel/sched/cputime.c index f1110760ff6c..94b1a72879ec 100644 --- a/kernel/sched/cputime.c +++ b/kernel/sched/cputime.c @@ -78,30 +78,26 @@ EXPORT_SYMBOL_GPL(irqtime_account_irq); static cputime_t irqtime_account_hi_update(cputime_t maxtime) { u64 *cpustat = kcpustat_this_cpu->cpustat; - unsigned long flags; cputime_t irq_cputime; - local_irq_save(flags); 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; - local_irq_restore(flags); + return irq_cputime; } static cputime_t irqtime_account_si_update(cputime_t maxtime) { u64 *cpustat = kcpustat_this_cpu->cpustat; - unsigned long flags; cputime_t softirq_cputime; - local_irq_save(flags); 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; - local_irq_restore(flags); + return softirq_cputime; } @@ -295,6 +291,9 @@ static inline cputime_t account_other_time(cputime_t max) { cputime_t accounted; + /* Shall be converted to a lockdep-enabled lightweight check */ + WARN_ON_ONCE(!irqs_disabled()); + accounted = steal_account_process_time(max); if (accounted < max) |