- Change mi_switch() and sched_switch() to accept an optional thread to

  switch to.  If a non-NULL thread pointer is passed in, then the CPU will
  switch to that thread directly rather than calling choosethread() to pick
  a thread to choose to.
- Make sched_switch() aware of idle threads and know to do
  TD_SET_CAN_RUN() instead of sticking them on the run queue rather than
  requiring all callers of mi_switch() to know to do this if they can be
  called from an idlethread.
- Move constants for arguments to mi_switch() and thread_single() out of
  the middle of the function prototypes and up above into their own
  section.

1 files changed, 2 insertions, 2 deletions

diff --git a/sys/kern/kern_sig.c b/sys/kern/kern_sig.c
index e3466a9..d17cbe2 100644
--- a/sys/kern/kern_sig.c
+++ b/sys/kern/kern_sig.c
@@ -2019,7 +2019,7 @@ ptracestop(struct thread *td, int sig)
 	thread_suspend_one(td);
 	PROC_UNLOCK(p);
 	DROP_GIANT();
-	mi_switch(SW_INVOL);
+	mi_switch(SW_INVOL, NULL);
 	mtx_unlock_spin(&sched_lock);
 	PICKUP_GIANT();
 }
@@ -2168,7 +2168,7 @@ issignal(td)
 				thread_suspend_one(td);
 				PROC_UNLOCK(p);
 				DROP_GIANT();
-				mi_switch(SW_INVOL);
+				mi_switch(SW_INVOL, NULL);
 				mtx_unlock_spin(&sched_lock);
 				PICKUP_GIANT();
 				PROC_LOCK(p);