PSN-EDF: re-implement FMLP support

Implement the partitioned FMLP with priority boosting based on the
generic lock API.

1 files changed, 13 insertions, 0 deletions

diff --git a/litmus/locking.c b/litmus/locking.c
index ab643475093f..d39afaeefffe 100644
--- a/litmus/locking.c
+++ b/litmus/locking.c
@@ -108,6 +108,19 @@ asmlinkage long sys_litmus_unlock(int lock_od)
         return err;
 }
 
+struct task_struct* waitqueue_first(wait_queue_head_t *wq)
+{
+        wait_queue_t *q;
+
+        if (waitqueue_active(wq)) {
+                q = list_entry(wq->task_list.next,
+                               wait_queue_t, task_list);
+                return (struct task_struct*) q->private;
+        } else
+                return NULL;
+}
+
+
 #else
 
 struct fdso_ops generic_lock_ops = {};