1 files changed, 8 insertions, 2 deletions

diff --git a/lib/flex_proportions.c b/lib/flex_proportions.c
index e02a3883ae0..c785554f952 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;
 }