sched: Simplify sys_sched_rr_get_interval() system call

By removing the need for it to know details of scheduling classes.

This allows PlugSched to define orthogonal scheduling classes.

Signed-off-by: Peter Williams <pwil3058@bigpond.net.au>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
LKML-Reference: <06d1b89ee15a0eef82d7.1253496713@mudlark.pw.nest>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/sched.h b/include/linux/sched.h
index cc37a3fa5065..239c8e0dba9f 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1075,6 +1075,8 @@ struct sched_class {
         void (*prio_changed) (struct rq *this_rq, struct task_struct *task,
                              int oldprio, int running);
 
+        unsigned int (*get_rr_interval) (struct task_struct *task);
+
 #ifdef CONFIG_FAIR_GROUP_SCHED
         void (*moved_group) (struct task_struct *p);
 #endif