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authorFrederic Weisbecker <fweisbec@gmail.com>2016-09-26 02:29:18 +0200
committerIngo Molnar <mingo@kernel.org>2016-09-30 11:46:39 +0200
commit2810f611f908112ea1b30bc016d25205acb3d486 (patch)
tree7d20a062428cfe75112c40b19cc94a499966f086 /kernel/sched
parentf9094a65755df86ec931f47b781f68ea3095cb56 (diff)
downloadlinux-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/sched')
-rw-r--r--kernel/sched/cputime.c11
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)