- 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, 4 insertions, 3 deletions

diff --git a/sys/amd64/linux32/linux32_machdep.c b/sys/amd64/linux32/linux32_machdep.c
index dbf32cd..496d592 100644
--- a/sys/amd64/linux32/linux32_machdep.c
+++ b/sys/amd64/linux32/linux32_machdep.c
@@ -46,6 +46,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/proc.h>
 #include <sys/resource.h>
 #include <sys/resourcevar.h>
+#include <sys/sched.h>
 #include <sys/syscallsubr.h>
 #include <sys/sysproto.h>
 #include <sys/unistd.h>
@@ -480,7 +481,7 @@ linux_fork(struct thread *td, struct linux_fork_args *args)
 	/* make it run */
 	mtx_lock_spin(&sched_lock);
 	TD_SET_CAN_RUN(td2);
-	setrunqueue(td2, SRQ_BORING);
+	sched_add(td2, SRQ_BORING);
 	mtx_unlock_spin(&sched_lock);
 
 	return (0);
@@ -521,7 +522,7 @@ linux_vfork(struct thread *td, struct linux_vfork_args *args)
 	/* make it run */
 	mtx_lock_spin(&sched_lock);
 	TD_SET_CAN_RUN(td2);
-	setrunqueue(td2, SRQ_BORING);
+	sched_add(td2, SRQ_BORING);
 	mtx_unlock_spin(&sched_lock);
 
 	/* wait for the children to exit, ie. emulate vfork */
@@ -672,7 +673,7 @@ linux_clone(struct thread *td, struct linux_clone_args *args)
 	 */
 	mtx_lock_spin(&sched_lock);
 	TD_SET_CAN_RUN(td2);
-	setrunqueue(td2, SRQ_BORING);
+	sched_add(td2, SRQ_BORING);
 	mtx_unlock_spin(&sched_lock);
 
 	td->td_retval[0] = p2->p_pid;