bugfix: don't forget to requeue linked task at the end of RT mode

This caused RT tasks to get lost.

1 files changed, 10 insertions, 5 deletions

diff --git a/kernel/sched_gsn_edf.c b/kernel/sched_gsn_edf.c
index 948d2b4dc3..293dd5d532 100644
--- a/kernel/sched_gsn_edf.c
+++ b/kernel/sched_gsn_edf.c
@@ -424,8 +424,10 @@ static int gsnedf_schedule(struct task_struct * prev,
                          struct task_struct ** next, 
                          runqueue_t * rq)
 {
-        cpu_entry_t*    entry = &__get_cpu_var(gsnedf_cpu_entries);
-        int             out_of_time, sleep, preempt, np, exists, rt, blocks;
+        cpu_entry_t*            entry = &__get_cpu_var(gsnedf_cpu_entries);
+        int                     out_of_time, sleep, preempt, np, exists, 
+                                rt, blocks;
+        struct task_struct*     linked;
 
         /* Will be released in finish_switch. */
         queue_lock(&gsnedf_lock);
@@ -468,11 +470,14 @@ static int gsnedf_schedule(struct task_struct * prev,
         
         /* Stop real-time tasks when we leave real-time mode 
          */
-        if (!rt && entry->linked)
+        if (!rt && entry->linked) {
                 /* task will be preempted once it is preemptable 
-                 * (which it may be now already)
+                 * (which it may be already)
                  */
-                unlink(entry->linked);  
+                linked = entry->linked;
+                unlink(linked);        
+                requeue(linked);
+        }
 
         /* Link pending task if we became unlinked.
          */