hrtimers: Convert hrtimers to use timerlist infrastructure

Converts the hrtimer code to use the new timerlist infrastructure

Signed-off-by: John Stultz <john.stultz@linaro.org>
LKML Reference: <1290136329-18291-3-git-send-email-john.stultz@linaro.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
CC: Alessandro Zummo <a.zummo@towertech.it>
CC: Thomas Gleixner <tglx@linutronix.de>
CC: Richard Cochran <richardcochran@gmail.com>

1 files changed, 15 insertions, 17 deletions

diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h
index dd9954b7934..330586ffffb 100644
--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.h
@@ -22,7 +22,7 @@
 #include <linux/wait.h>
 #include <linux/percpu.h>
 #include <linux/timer.h>
-
+#include <linux/timerqueue.h>
 
 struct hrtimer_clock_base;
 struct hrtimer_cpu_base;
@@ -79,8 +79,8 @@ enum hrtimer_restart {
 
 /**
  * struct hrtimer - the basic hrtimer structure
- * @node:       red black tree node for time ordered insertion
- * @_expires:   the absolute expiry time in the hrtimers internal
+ * @node:       timerqueue node, which also manages node.expires,
+ *              the absolute expiry time in the hrtimers internal
  *              representation. The time is related to the clock on
  *              which the timer is based. Is setup by adding
  *              slack to the _softexpires value. For non range timers
@@ -101,8 +101,7 @@ enum hrtimer_restart {
  * The hrtimer structure must be initialized by hrtimer_init()
  */
 struct hrtimer {
-        struct rb_node                  node;
-        ktime_t                         _expires;
+        struct timerqueue_node          node;
         ktime_t                         _softexpires;
         enum hrtimer_restart            (*function)(struct hrtimer *);
         struct hrtimer_clock_base       *base;
@@ -141,8 +140,7 @@ struct hrtimer_sleeper {
 struct hrtimer_clock_base {
         struct hrtimer_cpu_base *cpu_base;
         clockid_t               index;
-        struct rb_root          active;
-        struct rb_node          *first;
+        struct timerqueue_head  active;
         ktime_t                 resolution;
         ktime_t                 (*get_time)(void);
         ktime_t                 softirq_time;
@@ -183,43 +181,43 @@ struct hrtimer_cpu_base {
 
 static inline void hrtimer_set_expires(struct hrtimer *timer, ktime_t time)
 {
-        timer->_expires = time;
+        timer->node.expires = time;
         timer->_softexpires = time;
 }
 
 static inline void hrtimer_set_expires_range(struct hrtimer *timer, ktime_t time, ktime_t delta)
 {
         timer->_softexpires = time;
-        timer->_expires = ktime_add_safe(time, delta);
+        timer->node.expires = ktime_add_safe(time, delta);
 }
 
 static inline void hrtimer_set_expires_range_ns(struct hrtimer *timer, ktime_t time, unsigned long delta)
 {
         timer->_softexpires = time;
-        timer->_expires = ktime_add_safe(time, ns_to_ktime(delta));
+        timer->node.expires = ktime_add_safe(time, ns_to_ktime(delta));
 }
 
 static inline void hrtimer_set_expires_tv64(struct hrtimer *timer, s64 tv64)
 {
-        timer->_expires.tv64 = tv64;
+        timer->node.expires.tv64 = tv64;
         timer->_softexpires.tv64 = tv64;
 }
 
 static inline void hrtimer_add_expires(struct hrtimer *timer, ktime_t time)
 {
-        timer->_expires = ktime_add_safe(timer->_expires, time);
+        timer->node.expires = ktime_add_safe(timer->node.expires, time);
         timer->_softexpires = ktime_add_safe(timer->_softexpires, time);
 }
 
 static inline void hrtimer_add_expires_ns(struct hrtimer *timer, u64 ns)
 {
-        timer->_expires = ktime_add_ns(timer->_expires, ns);
+        timer->node.expires = ktime_add_ns(timer->node.expires, ns);
         timer->_softexpires = ktime_add_ns(timer->_softexpires, ns);
 }
 
 static inline ktime_t hrtimer_get_expires(const struct hrtimer *timer)
 {
-        return timer->_expires;
+        return timer->node.expires;
 }
 
 static inline ktime_t hrtimer_get_softexpires(const struct hrtimer *timer)
@@ -229,7 +227,7 @@ static inline ktime_t hrtimer_get_softexpires(const struct hrtimer *timer)
 
 static inline s64 hrtimer_get_expires_tv64(const struct hrtimer *timer)
 {
-        return timer->_expires.tv64;
+        return timer->node.expires.tv64;
 }
 static inline s64 hrtimer_get_softexpires_tv64(const struct hrtimer *timer)
 {
@@ -238,12 +236,12 @@ static inline s64 hrtimer_get_softexpires_tv64(const struct hrtimer *timer)
 
 static inline s64 hrtimer_get_expires_ns(const struct hrtimer *timer)
 {
-        return ktime_to_ns(timer->_expires);
+        return ktime_to_ns(timer->node.expires);
 }
 
 static inline ktime_t hrtimer_expires_remaining(const struct hrtimer *timer)
 {
-    return ktime_sub(timer->_expires, timer->base->get_time());
+        return ktime_sub(timer->node.expires, timer->base->get_time());
 }
 
 #ifdef CONFIG_HIGH_RES_TIMERS