diff options
| author | Rik van Riel <riel@redhat.com> | 2016-07-13 16:50:05 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-07-14 10:42:35 +0200 |
| commit | 553bf6bbfd8a540c70aee28eb50e24caff456a03 (patch) | |
| tree | ef441b2d8f5eb6761880602ed66b08860371ebba /kernel | |
| parent | 8612f17ab99c1f0770792bc875f5f039212a2a85 (diff) | |
| download | linux-553bf6bbfd8a540c70aee28eb50e24caff456a03.tar.bz2 | |
sched/cputime: Drop local_irq_save/restore from irqtime_account_irq()
Paolo pointed out that irqs are already blocked when irqtime_account_irq()
is called. That means there is no reason to call local_irq_save/restore()
again.
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Radim Krcmar <rkrcmar@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wanpeng Li <wanpeng.li@hotmail.com>
Link: http://lkml.kernel.org/r/1468421405-20056-6-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 | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/kernel/sched/cputime.c b/kernel/sched/cputime.c index 16a873c203b1..ea0f6f31a244 100644 --- a/kernel/sched/cputime.c +++ b/kernel/sched/cputime.c @@ -49,15 +49,12 @@ DEFINE_PER_CPU(seqcount_t, irq_time_seq); */ void irqtime_account_irq(struct task_struct *curr) { - unsigned long flags; s64 delta; int cpu; if (!sched_clock_irqtime) return; - local_irq_save(flags); - cpu = smp_processor_id(); delta = sched_clock_cpu(cpu) - __this_cpu_read(irq_start_time); __this_cpu_add(irq_start_time, delta); @@ -75,7 +72,6 @@ void irqtime_account_irq(struct task_struct *curr) __this_cpu_add(cpu_softirq_time, delta); irq_time_write_end(); - local_irq_restore(flags); } EXPORT_SYMBOL_GPL(irqtime_account_irq); |