[PATCH] rtc warning fix

drivers/char/rtc.c:116: warning: 'hpet_rtc_interrupt' defined but not used

Cc: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/char/rtc.c

@@ -113,7 +113,12 @@ static int rtc_has_irq = 1;
 #define hpet_set_rtc_irq_bit(arg) 		0
 #define hpet_rtc_timer_init() 			do { } while (0)
 #define hpet_rtc_dropped_irq() 			0
-static irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id) {return 0;}
+#ifdef RTC_IRQ
+static irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id)
+{
+	return 0;
+}
+#endif
 #else
 extern irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id);
 #endif