Bjoern's Dissertation Code with Priority Donationwip-splitting-omlp-jerickso

1 files changed, 32 insertions, 0 deletions

diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h
index fd0c1b857d3d..76da541c1f66 100644
--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.h
@@ -167,6 +167,7 @@ struct hrtimer_clock_base {
  * @nr_retries:         Total number of hrtimer interrupt retries
  * @nr_hangs:           Total number of hrtimer interrupt hangs
  * @max_hang_time:      Maximum time spent in hrtimer_interrupt
+ * @to_pull:            LITMUS^RT list of timers to be pulled on this cpu
  */
 struct hrtimer_cpu_base {
         raw_spinlock_t                  lock;
@@ -180,8 +181,32 @@ struct hrtimer_cpu_base {
         unsigned long                   nr_hangs;
         ktime_t                         max_hang_time;
 #endif
+        struct list_head                to_pull;
 };
 
+#ifdef CONFIG_ARCH_HAS_SEND_PULL_TIMERS
+
+#define HRTIMER_START_ON_INACTIVE       0
+#define HRTIMER_START_ON_QUEUED         1
+
+/*
+ * struct hrtimer_start_on_info - save timer info on remote cpu
+ * @list:       list of hrtimer_start_on_info on remote cpu (to_pull)
+ * @timer:      timer to be triggered on remote cpu
+ * @time:       time event
+ * @mode:       timer mode
+ * @state:      activity flag
+ */
+struct hrtimer_start_on_info {
+        struct list_head        list;
+        struct hrtimer          *timer;
+        ktime_t                 time;
+        enum hrtimer_mode       mode;
+        atomic_t                state;
+};
+
+#endif
+
 static inline void hrtimer_set_expires(struct hrtimer *timer, ktime_t time)
 {
         timer->_expires = time;
@@ -348,6 +373,13 @@ __hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim,
                          unsigned long delta_ns,
                          const enum hrtimer_mode mode, int wakeup);
 
+#ifdef CONFIG_ARCH_HAS_SEND_PULL_TIMERS
+extern void hrtimer_start_on_info_init(struct hrtimer_start_on_info *info);
+extern int hrtimer_start_on(int cpu, struct hrtimer_start_on_info *info,
+                        struct hrtimer *timer, ktime_t time,
+                        const enum hrtimer_mode mode);
+#endif
+
 extern int hrtimer_cancel(struct hrtimer *timer);
 extern int hrtimer_try_to_cancel(struct hrtimer *timer);