From 9e42ad10cedf0632fc39860381375806092212bd Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Thu, 10 Dec 2020 20:25:41 +0100 Subject: genirq: Annotate irq stats data races Both the per cpu stats and the accumulated count are accessed lockless and can be concurrently modified. That's intentional and the stats are a rough estimate anyway. Annotate them with data_race(). Signed-off-by: Thomas Gleixner Link: https://lore.kernel.org/r/20201210194043.067097663@linutronix.de --- kernel/irq/irqdesc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'kernel/irq/irqdesc.c') diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c index 20a54fa7cd30..02b446a21ce6 100644 --- a/kernel/irq/irqdesc.c +++ b/kernel/irq/irqdesc.c @@ -943,10 +943,10 @@ unsigned int kstat_irqs(unsigned int irq) if (!irq_settings_is_per_cpu_devid(desc) && !irq_settings_is_per_cpu(desc) && !irq_is_nmi(desc)) - return desc->tot_count; + return data_race(desc->tot_count); for_each_possible_cpu(cpu) - sum += *per_cpu_ptr(desc->kstat_irqs, cpu); + sum += data_race(*per_cpu_ptr(desc->kstat_irqs, cpu)); return sum; } -- cgit v1.2.3