Merge branch 'timers-for-linus-urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'timers-for-linus-urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  timers: Fix slack calculation for expired timers
  timekeeping: Fix timezone update

2 files changed, 8 insertions, 7 deletions

diff --git a/kernel/time.c b/kernel/time.c
index 50612faa9baf..848b1c2ab09a 100644
--- a/kernel/time.c
+++ b/kernel/time.c
@@ -132,10 +132,10 @@ SYSCALL_DEFINE2(gettimeofday, struct timeval __user *, tv,
  */
 static inline void warp_clock(void)
 {
-        struct timespec delta, adjust;
-        delta.tv_sec = sys_tz.tz_minuteswest * 60;
-        delta.tv_nsec = 0;
-        adjust = timespec_add_safe(current_kernel_time(), delta);
+        struct timespec adjust;
+
+        adjust = current_kernel_time();
+        adjust.tv_sec += sys_tz.tz_minuteswest * 60;
         do_settimeofday(&adjust);
 }
 
diff --git a/kernel/timer.c b/kernel/timer.c
index 9199f3c52215..be394af5bc22 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -750,13 +750,14 @@ unsigned long apply_slack(struct timer_list *timer, unsigned long expires)
         unsigned long expires_limit, mask;
         int bit;
 
-        expires_limit = expires + timer->slack;
+        expires_limit = expires;
 
-        if (timer->slack < 0) /* auto slack: use 0.4% */
+        if (timer->slack > -1)
+                expires_limit = expires + timer->slack;
+        else if (time_after(expires, jiffies)) /* auto slack: use 0.4% */
                 expires_limit = expires + (expires - jiffies)/256;
 
         mask = expires ^ expires_limit;
-
         if (mask == 0)
                 return expires;