input: evdev: Use ktime_mono_to_real()

Convert the monotonic timestamp with ktime_mono_to_real() in
evdev_events().

In evdev_queue_syn_dropped() we can call either ktime_get() or
ktime_get_real() depending on the clkid. No point in having two calls
for CLOCK_REALTIME.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Stultz <john.stultz@linaro.org>

drivers/input/evdev.c

@@ -108,9 +108,8 @@ static void evdev_queue_syn_dropped(struct evdev_client *client)
 	struct input_event ev;
 	ktime_t time;
 
-	time = ktime_get();
-	if (client->clkid != CLOCK_MONOTONIC)
-		time = ktime_sub(time, ktime_get_monotonic_offset());
+	time = (client->clkid == CLOCK_MONOTONIC) ?
+		ktime_get() : ktime_get_real();
 
 	ev.time = ktime_to_timeval(time);
 	ev.type = EV_SYN;
@@ -202,7 +201,7 @@ static void evdev_events(struct input_handle *handle,
 	ktime_t time_mono, time_real;
 
 	time_mono = ktime_get();
-	time_real = ktime_sub(time_mono, ktime_get_monotonic_offset());
+	time_real = ktime_mono_to_real(time_mono);
 
 	rcu_read_lock();