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| author | Thomas Gleixner <tglx@linutronix.de> | 2020-12-10 20:25:41 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-12-15 16:19:30 +0100 |
| commit | 9e42ad10cedf0632fc39860381375806092212bd (patch) | |
| tree | 869b44fb4351939487b8d5a47ec4057357ff19da /kernel/irq/irqdesc.c | |
| parent | 3e2380123fb96987ce958f623207010c667ffa7c (diff) | |
| download | linux-9e42ad10cedf0632fc39860381375806092212bd.tar.gz linux-9e42ad10cedf0632fc39860381375806092212bd.tar.bz2 linux-9e42ad10cedf0632fc39860381375806092212bd.zip | |
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 <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20201210194043.067097663@linutronix.de
Diffstat (limited to 'kernel/irq/irqdesc.c')
| -rw-r--r-- | kernel/irq/irqdesc.c | 4 |
1 files changed, 2 insertions, 2 deletions
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; } |