Fixed GSN-EDF job_arrival() function.

Now the correct job is linked in case that a linked job lowers its
priority. This could happen if a tardy job's successor is immediately
released in the scheduler_tick() function.

The preemption_needed() function was made more robust to handle NULL
pointers correctly (needed for GSN-EDF).

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/edf_common.h b/include/linux/edf_common.h
index 3b6a1de457..252efce97a 100644
--- a/include/linux/edf_common.h
+++ b/include/linux/edf_common.h
@@ -33,6 +33,8 @@ void __add_ready(edf_domain_t* edf, struct task_struct *new);
 void __add_release(edf_domain_t* edf, struct task_struct *task);
 
 struct task_struct* __take_ready(edf_domain_t* edf);
+struct task_struct* __peek_ready(edf_domain_t* edf);
+
 
 void try_release_pending(edf_domain_t* edf);
 void __prepare_new_release(struct task_struct *t, jiffie_t start);