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-rw-r--r--lib/flex_proportions.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/lib/flex_proportions.c b/lib/flex_proportions.c
index e02a3883ae01..c785554f9523 100644
--- a/lib/flex_proportions.c
+++ b/lib/flex_proportions.c
@@ -62,13 +62,18 @@ void fprop_global_destroy(struct fprop_global *p)
*/
bool fprop_new_period(struct fprop_global *p, int periods)
{
- u64 events = percpu_counter_sum(&p->events);
+ u64 events;
+ unsigned long flags;
+ local_irq_save(flags);
+ events = percpu_counter_sum(&p->events);
/*
* Don't do anything if there are no events.
*/
- if (events <= 1)
+ if (events <= 1) {
+ local_irq_restore(flags);
return false;
+ }
write_seqcount_begin(&p->sequence);
if (periods < 64)
events -= events >> periods;
@@ -76,6 +81,7 @@ bool fprop_new_period(struct fprop_global *p, int periods)
percpu_counter_add(&p->events, -events);
p->period += periods;
write_seqcount_end(&p->sequence);
+ local_irq_restore(flags);
return true;
}