diff --git a/drivers/char/random.c b/drivers/char/random.c
index 5a1aa64f4e76..72a4fcb17745 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -626,7 +626,7 @@ static void add_timer_randomness(struct timer_rand_state *state, unsigned num)
 	preempt_disable();
 	/* if over the trickle threshold, use only 1 in 4096 samples */
 	if (input_pool.entropy_count > trickle_thresh &&
-	    (__get_cpu_var(trickle_count)++ & 0xfff))
+	    ((__this_cpu_inc_return(trickle_count) - 1) & 0xfff))
 		goto out;
 
 	sample.jiffies = jiffies;