1 files changed, 7 insertions, 3 deletions

diff --git a/kernel/timer.c b/kernel/timer.c
index e3b8c697bde4..2454172a80d3 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -752,11 +752,15 @@ unsigned long apply_slack(struct timer_list *timer, unsigned long expires)
 
         expires_limit = expires;
 
-        if (timer->slack > -1)
+        if (timer->slack >= 0) {
                 expires_limit = expires + timer->slack;
-        else if (time_after(expires, jiffies)) /* auto slack: use 0.4% */
-                expires_limit = expires + (expires - jiffies)/256;
+        } else {
+                unsigned long now = jiffies;
 
+                /* No slack, if already expired else auto slack 0.4% */
+                if (time_after(expires, now))
+                        expires_limit = expires + (expires - now)/256;
+        }
         mask = expires ^ expires_limit;
         if (mask == 0)
                 return expires;