Merge git://git.kernel.org/pub/scm/linux/kernel/git/tglx/linux-2.6-hrt

* git://git.kernel.org/pub/scm/linux/kernel/git/tglx/linux-2.6-hrt:
  time: remove obsolete CLOCK_TICK_ADJUST
  time: don't touch an offlined CPU's ts->tick_stopped in tick_cancel_sched_timer()
  time: prevent the loop in timespec_add_ns() from being optimised away
  ntp: use unsigned input for do_div()

1 files changed, 4 insertions, 0 deletions

diff --git a/include/linux/time.h b/include/linux/time.h
index 2091a19f1655..d32ef0ad4c0a 100644
--- a/include/linux/time.h
+++ b/include/linux/time.h
@@ -174,6 +174,10 @@ static inline void timespec_add_ns(struct timespec *a, u64 ns)
 {
         ns += a->tv_nsec;
         while(unlikely(ns >= NSEC_PER_SEC)) {
+                /* The following asm() prevents the compiler from
+                 * optimising this loop into a modulo operation.  */
+                asm("" : "+r"(ns));
+
                 ns -= NSEC_PER_SEC;
                 a->tv_sec++;
         }