Add scheduler API sched_relinquish(), the API is used to implement

yield() and sched_yield() syscalls. Every scheduler has its own way
to relinquish cpu, the ULE and CORE schedulers have two internal run-
queues, a timesharing thread which calls yield() syscall should be
moved to inactive queue.

1 files changed, 1 insertions, 3 deletions

diff --git a/sys/posix4/ksched.c b/sys/posix4/ksched.c
index c4a5f0b..7884d90 100644
--- a/sys/posix4/ksched.c
+++ b/sys/posix4/ksched.c
@@ -253,9 +253,7 @@ ksched_getscheduler(register_t *ret, struct ksched *ksched, struct thread *td)
 int
 ksched_yield(register_t *ret, struct ksched *ksched)
 {
-	mtx_lock_spin(&sched_lock);
-	curthread->td_flags |= TDF_NEEDRESCHED;
-	mtx_unlock_spin(&sched_lock);
+	sched_relinquish(curthread);
 	return 0;
 }