- Remove setrunqueue and replace it with direct calls to sched_add().

   setrunqueue() was mostly empty.  The few asserts and thread state
   setting were moved to the individual schedulers.  sched_add() was
   chosen to displace it for naming consistency reasons.
 - Remove adjustrunqueue, it was 4 lines of code that was ifdef'd to be
   different on all three schedulers where it was only called in one place
   each.
 - Remove the long ifdef'd out remrunqueue code.
 - Remove the now redundant ts_state.  Inspect the thread state directly.
 - Don't set TSF_* flags from kern_switch.c, we were only doing this to
   support a feature in one scheduler.
 - Change sched_choose() to return a thread rather than a td_sched.  Also,
   rely on the schedulers to return the idlethread.  This simplifies the
   logic in choosethread().  Aside from the run queue links kern_switch.c
   mostly does not care about the contents of td_sched.

Discussed with:	julian

 - Move the idle thread loop into the per scheduler area.  ULE wants to
   do something different from the other schedulers.

Suggested by:	jhb

Tested on:	x86/amd64 sched_{4BSD, ULE, CORE}.

1 files changed, 2 insertions, 1 deletions

diff --git a/sys/kern/kern_kthread.c b/sys/kern/kern_kthread.c
index 30efbaf..c473bb0 100644
--- a/sys/kern/kern_kthread.c
+++ b/sys/kern/kern_kthread.c
@@ -38,6 +38,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/sx.h>
 #include <sys/unistd.h>
 #include <sys/wait.h>
+#include <sys/sched.h>
 
 #include <machine/stdarg.h>
 
@@ -113,7 +114,7 @@ kthread_create(void (*func)(void *), void *arg,
 	/* Delay putting it on the run queue until now. */
 	if (!(flags & RFSTOPPED)) {
 		mtx_lock_spin(&sched_lock);
-		setrunqueue(td, SRQ_BORING); 
+		sched_add(td, SRQ_BORING); 
 		mtx_unlock_spin(&sched_lock);
 	}