Change APIs for sched_class and spinlock

- get_rr_interval() changed signature
- load_balance() and move_one_tak() are no longer needed
- spinlock -> raw_spinlock

1 files changed, 10 insertions, 27 deletions

diff --git a/litmus/sched_litmus.c b/litmus/sched_litmus.c
index c1fc7748e590..0cdf284eb9c2 100644
--- a/litmus/sched_litmus.c
+++ b/litmus/sched_litmus.c
@@ -60,7 +60,7 @@ litmus_schedule(struct rq *rq, struct task_struct *prev)
                  */
                 was_running = is_running(prev);
                 mb();
-                spin_unlock(&rq->lock);
+                raw_spin_unlock(&rq->lock);
 
                 /* Don't race with a concurrent switch.  This could deadlock in
                  * the case of cross or circular migrations.  It's the job of
@@ -91,7 +91,7 @@ litmus_schedule(struct rq *rq, struct task_struct *prev)
                                 next = NULL;
 
                                 /* bail out */
-                                spin_lock(&rq->lock);
+                                raw_spin_lock(&rq->lock);
                                 return next;
                         }
                 }
@@ -139,7 +139,7 @@ litmus_schedule(struct rq *rq, struct task_struct *prev)
                         next = NULL;
                 }
                 /* release the other CPU's runqueue, but keep ours */
-                spin_unlock(&other_rq->lock);
+                raw_spin_unlock(&other_rq->lock);
         }
         if (next) {
                 next->rt_param.stack_in_use = rq->cpu;
@@ -150,7 +150,7 @@ litmus_schedule(struct rq *rq, struct task_struct *prev)
 }
 
 static void enqueue_task_litmus(struct rq *rq, struct task_struct *p,
-                                int wakeup)
+                                int wakeup, bool head)
 {
         if (wakeup) {
                 sched_trace_task_resume(p);
@@ -243,7 +243,7 @@ static void prio_changed_litmus(struct rq *rq, struct task_struct *p,
 {
 }
 
-unsigned int get_rr_interval_litmus(struct task_struct *p)
+unsigned int get_rr_interval_litmus(struct rq *rq, struct task_struct *p)
 {
         /* return infinity */
         return 0;
@@ -261,31 +261,16 @@ static void set_curr_task_litmus(struct rq *rq)
 
 
 #ifdef CONFIG_SMP
-/* execve tries to rebalance task in this scheduling domain */
+/* execve tries to rebalance task in this scheduling domain.
+ * We don't care about the scheduling domain; can gets called from
+ * exec, fork, wakeup.
+ */
 static int select_task_rq_litmus(struct task_struct *p, int sd_flag, int flags)
 {
         /* preemption is already disabled.
          * We don't want to change cpu here
          */
-        return smp_processor_id();
-}
-
-/* we don't repartition at runtime */
-
-static unsigned long
-load_balance_litmus(struct rq *this_rq, int this_cpu, struct rq *busiest,
-                unsigned long max_load_move,
-                struct sched_domain *sd, enum cpu_idle_type idle,
-                int *all_pinned, int *this_best_prio)
-{
-        return 0;
-}
-
-static int
-move_one_task_litmus(struct rq *this_rq, int this_cpu, struct rq *busiest,
-                 struct sched_domain *sd, enum cpu_idle_type idle)
-{
-        return 0;
+        return task_cpu(p);
 }
 #endif
 
@@ -303,8 +288,6 @@ const struct sched_class litmus_sched_class = {
 #ifdef CONFIG_SMP
         .select_task_rq         = select_task_rq_litmus,
 
-        .load_balance           = load_balance_litmus,
-        .move_one_task          = move_one_task_litmus,
         .pre_schedule           = pre_schedule_litmus,
 #endif