[PATCH] x86: fix potential jiffies overflow in timer_resume()

i386 timer_resume is updating jiffies, not jiffies_64.  It looks there is a
potential overflow problem.  And jiffies_64 and wall_jiffies should be
protected by xtime_lock.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: john stultz <johnstul@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/i386/kernel/time.c b/arch/i386/kernel/time.c
index a14d594bfbeb..9d3074759856 100644
--- a/arch/i386/kernel/time.c
+++ b/arch/i386/kernel/time.c
@@ -412,9 +412,9 @@ static int timer_resume(struct sys_device *dev)
         write_seqlock_irqsave(&xtime_lock, flags);
         xtime.tv_sec = sec;
         xtime.tv_nsec = 0;
-        write_sequnlock_irqrestore(&xtime_lock, flags);
-        jiffies += sleep_length;
+        jiffies_64 += sleep_length;
         wall_jiffies += sleep_length;
+        write_sequnlock_irqrestore(&xtime_lock, flags);
         if (last_timer->resume)
                 last_timer->resume();
         cur_timer = last_timer;