Extract out KSE specific code from machine specific code

so that there is ony one copy of it. Fix that one copy
so that KSEs with no mailbox in a KSE program are not a cause
of page faults (this can legitmatly happen).

Submitted by:	(parts) davidxu

1 files changed, 2 insertions, 18 deletions

diff --git a/sys/alpha/alpha/trap.c b/sys/alpha/alpha/trap.c
index 3db80de..6c554f7 100644
--- a/sys/alpha/alpha/trap.c
+++ b/sys/alpha/alpha/trap.c
@@ -669,24 +669,8 @@ syscall(code, framep)
 	sticks = td->td_kse->ke_sticks;
 	if (td->td_ucred != p->p_ucred)
 		cred_update_thread(td);
-	if (p->p_flag & P_KSES) {
-		/*
-		 * If we are doing a syscall in a KSE environment,
-		 * note where our mailbox is. There is always the
-		 * possibility that we could do this lazily (in sleep()),
-		 * but for now do it every time.
-		 */
-		td->td_mailbox = (void *)fuword((caddr_t)td->td_kse->ke_mailbox
-		    + offsetof(struct kse_mailbox, km_curthread));
-		if ((td->td_mailbox == NULL) ||
-		    (td->td_mailbox == (void *)-1)) {
-			td->td_mailbox = NULL;  /* single thread it.. */
-			td->td_flags &= ~TDF_UNBOUND;
-		} else {
-			td->td_flags |= TDF_UNBOUND;
-		}
-	}
-
+	if (p->p_flag & P_KSES)
+		thread_user_enter(p, td);
 #ifdef DIAGNOSTIC
 	alpha_fpstate_check(td);
 #endif