--- /dev/null
+--- a/kernel/ztdummy.c
++++ b/kernel/ztdummy.c
+@@ -55,7 +55,7 @@
+ * the #define USE_RTC should be commented out.
+ */
+ #if defined(__i386__) || defined(__x86_64__)
+-#if LINUX_VERSION_CODE >= VERSION_CODE(2,6,13)
++#if LINUX_VERSION_CODE >= VERSION_CODE(2,6,15)
+ /* The symbol hrtimer_forward is only exported as of 2.6.22: */
+ #if defined(CONFIG_HIGH_RES_TIMERS) && LINUX_VERSION_CODE >= VERSION_CODE(2,6,22)
+ #define USE_HIGHRESTIMER
+@@ -91,6 +91,18 @@
+ #endif
+ #include "ztdummy.h"
+
++#if defined(USE_HIGHRESTIMER) && ( LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28) )
++/* compatibility with new hrtimer interface */
++static inline ktime_t hrtimer_get_expires(const struct hrtimer *timer)
++{
++ return timer->expires;
++}
++
++static inline void hrtimer_set_expires(struct hrtimer *timer, ktime_t time)
++{
++ timer->expires = time;
++}
++#endif
+
+ static struct ztdummy *ztd;
+
+@@ -200,7 +212,7 @@ static enum hrtimer_restart ztdummy_hr_i
+ * expired.
+ * We should worry if overrun is 2 or more; then we really missed
+ * a tick */
+- overrun = hrtimer_forward(&zaptimer, htmr->expires,
++ overrun = hrtimer_forward(&zaptimer, hrtimer_get_expires(htmr),
+ ktime_set(0, ZAPTEL_TIME_NS));
+ if(overrun > 1) {
+ if(printk_ratelimit())
+@@ -223,7 +235,7 @@ static enum hrtimer_restart ztdummy_hr_i
+ /* use kernel system tick timer if PC architecture RTC is not available */
+ static void ztdummy_timer(unsigned long param)
+ {
+- timer.expires = jiffies + 1;
++ hrtimer_set_expires(timer, jiffies + 1);
+ add_timer(&timer);
+
+ ztd->counter += ZAPTEL_TIME;