time: Fix accumulation bug triggered by long delay.

[safe/jmp/linux-2.6] / kernel / time / timekeeping.c

diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 1673637..39f6177 100644 (file)
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -818,7 +818,8 @@ void update_wall_time(void)
        shift = min(shift, maxshift);
        while (offset >= timekeeper.cycle_interval) {
                offset = logarithmic_accumulation(offset, shift);
-               shift--;
+               if(offset < timekeeper.cycle_interval<<shift)
+                       shift--;
        }
 
        /* correct the clock when NTP error is too big */