Merge ../from-linus

1 files changed, 5 insertions, 2 deletions

diff --git a/drivers/char/rtc.c b/drivers/char/rtc.c
index d8f9e94ae475..cd4fe8b1709f 100644
--- a/drivers/char/rtc.c
+++ b/drivers/char/rtc.c
@@ -1209,6 +1209,7 @@ static int rtc_proc_open(struct inode *inode, struct file *file)
 
 void rtc_get_rtc_time(struct rtc_time *rtc_tm)
 {
+        unsigned long uip_watchdog = jiffies;
         unsigned char ctrl;
 #ifdef CONFIG_MACH_DECSTATION
         unsigned int real_year;
@@ -1224,8 +1225,10 @@ void rtc_get_rtc_time(struct rtc_time *rtc_tm)
          * Once the read clears, read the RTC time (again via ioctl). Easy.
          */
 
-        if (rtc_is_updating() != 0)
-                msleep(20);
+        while (rtc_is_updating() != 0 && jiffies - uip_watchdog < 2*HZ/100) {
+                barrier();
+                cpu_relax();
+        }
 
         /*
          * Only the values that we read from the RTC are set. We leave