[src/trunk]: src/sys/kern sleepq_insert: call lwp_eprio only when necessary

[yamt <yamt%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/0dd75c18fc0f
branches:  trunk
changeset: 767662:0dd75c18fc0f
user:      yamt <yamt%NetBSD.org@localhost>
date:      Tue Jul 26 13:04:51 2011 +0000

description:
sleepq_insert: call lwp_eprio only when necessary

diffstat:

 sys/kern/kern_sleepq.c |  9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)

diffs (32 lines):

diff -r 94bdf5caa44e -r 0dd75c18fc0f sys/kern/kern_sleepq.c
--- a/sys/kern/kern_sleepq.c    Tue Jul 26 13:03:57 2011 +0000
+++ b/sys/kern/kern_sleepq.c    Tue Jul 26 13:04:51 2011 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: kern_sleepq.c,v 1.39 2011/05/13 22:19:41 rmind Exp $   */
+/*     $NetBSD: kern_sleepq.c,v 1.40 2011/07/26 13:04:51 yamt Exp $    */
 
 /*-
  * Copyright (c) 2006, 2007, 2008, 2009 The NetBSD Foundation, Inc.
@@ -35,7 +35,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: kern_sleepq.c,v 1.39 2011/05/13 22:19:41 rmind Exp $");
+__KERNEL_RCSID(0, "$NetBSD: kern_sleepq.c,v 1.40 2011/07/26 13:04:51 yamt Exp $");
 
 #include <sys/param.h>
 #include <sys/kernel.h>
@@ -166,10 +166,11 @@
 void
 sleepq_insert(sleepq_t *sq, lwp_t *l, syncobj_t *sobj)
 {
-       lwp_t *l2;
-       const int pri = lwp_eprio(l);
 
        if ((sobj->sobj_flag & SOBJ_SLEEPQ_SORTED) != 0) {
+               lwp_t *l2;
+               const int pri = lwp_eprio(l);
+
                TAILQ_FOREACH(l2, sq, l_sleepchain) {
                        if (lwp_eprio(l2) < pri) {
                                TAILQ_INSERT_BEFORE(l2, l, l_sleepchain);