From: Ben Collins <bcollins@ubuntu.com>

Signed-off-by: Ben Collins <bcollins@ubuntu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/char/rtc.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletion(-)

diff -puN drivers/char/rtc.c~rtc-ratelimit-lost-interrupts-message drivers/char/rtc.c
--- a/drivers/char/rtc.c~rtc-ratelimit-lost-interrupts-message
+++ a/drivers/char/rtc.c
@@ -1159,7 +1159,8 @@ static void rtc_dropped_irq(unsigned lon
 
 	spin_unlock_irq(&rtc_lock);
 
-	printk(KERN_WARNING "rtc: lost some interrupts at %ldHz.\n", freq);
+	if (printk_ratelimit())
+		printk(KERN_WARNING "rtc: lost some interrupts at %ldHz.\n", freq);
 
 	/* Now we have new data */
 	wake_up_interruptible(&rtc_wait);
_