[ALSA] rtctimer: remove superfluous rtc_inc variable

Modules: RTC timer driver

The rtc_inc variable is never used outside the interrupt handler, and
is always one where it matters, so we can just remove it.
Signed-off-by: NClemens Ladisch <clemens@ladisch.de>

sound/core/rtctimer.c

@@ -60,7 +60,6 @@ static struct _snd_timer_hardware rtc_hw = {
 
 static int rtctimer_freq = RTC_FREQ;		/* frequency */
 static snd_timer_t *rtctimer;
-static atomic_t rtc_inc = ATOMIC_INIT(0);
 static rtc_task_t rtc_task;
 
 
@@ -94,7 +93,6 @@ rtctimer_start(snd_timer_t *timer)
 	snd_assert(rtc != NULL, return -EINVAL);
 	rtc_control(rtc, RTC_IRQP_SET, rtctimer_freq);
 	rtc_control(rtc, RTC_PIE_ON, 0);
-	atomic_set(&rtc_inc, 0);
 	return 0;
 }
 
@@ -112,12 +110,7 @@ rtctimer_stop(snd_timer_t *timer)
  */
 static void rtctimer_interrupt(void *private_data)
 {
-	int ticks;
-
-	atomic_inc(&rtc_inc);
-	ticks = atomic_read(&rtc_inc);
-	snd_timer_interrupt((snd_timer_t*)private_data, ticks);
-	atomic_sub(ticks, &rtc_inc);
+	snd_timer_interrupt(private_data, 1);
 }