[src/trunk]: src/sys/rump/librump/rumpkern init global cv only once

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

details:   https://anonhg.NetBSD.org/src/rev/df910467c53f
branches:  trunk
changeset: 749084:df910467c53f
user:      pooka <pooka%NetBSD.org@localhost>
date:      Tue Nov 17 15:23:42 2009 +0000

description:
init global cv only once

diffstat:

 sys/rump/librump/rumpkern/sleepq.c |  19 +++++++++++++++----
 1 files changed, 15 insertions(+), 4 deletions(-)

diffs (49 lines):

diff -r 3c8775594035 -r df910467c53f sys/rump/librump/rumpkern/sleepq.c
--- a/sys/rump/librump/rumpkern/sleepq.c        Tue Nov 17 15:02:08 2009 +0000
+++ b/sys/rump/librump/rumpkern/sleepq.c        Tue Nov 17 15:23:42 2009 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: sleepq.c,v 1.5 2009/10/21 23:13:53 rmind Exp $ */
+/*     $NetBSD: sleepq.c,v 1.6 2009/11/17 15:23:42 pooka Exp $ */
 
 /*
  * Copyright (c) 2008 Antti Kantee.  All Rights Reserved.
@@ -26,11 +26,12 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: sleepq.c,v 1.5 2009/10/21 23:13:53 rmind Exp $");
+__KERNEL_RCSID(0, "$NetBSD: sleepq.c,v 1.6 2009/11/17 15:23:42 pooka Exp $");
 
 #include <sys/param.h>
 #include <sys/condvar.h>
 #include <sys/mutex.h>
+#include <sys/once.h>
 #include <sys/queue.h>
 #include <sys/sleepq.h>
 #include <sys/syncobj.h>
@@ -46,13 +47,23 @@
 syncobj_t sleep_syncobj;
 static kcondvar_t sq_cv;
 
+static int
+sqinit1(void)
+{
+
+       cv_init(&sq_cv, "sleepq");
+
+       return 0;
+}
+
 void
 sleepq_init(sleepq_t *sq)
 {
+       ONCE_DECL(sqctl);
+
+       RUN_ONCE(&sqctl, sqinit1);
 
        TAILQ_INIT(sq);
-
-       cv_init(&sq_cv, "sleepq"); /* XXX */
 }
 
 void