From b1b9518a9ac571610e42a194d3122bc197d9ccaf Mon Sep 17 00:00:00 2001
From: deraadt <deraadt@openbsd.org>
Date: Sat, 19 Feb 2022 23:56:18 +0000
Subject: [PATCH] tsleep() prints a stack trace when cold==2.  The
 suspend/resume code has phases where sleeps are not allowed, and this used to
 discover it. msleep() needs the same check.

---
 sys/kern/kern_synch.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/sys/kern/kern_synch.c b/sys/kern/kern_synch.c
index e993131cd9b..d888cb2b84a 100644
--- a/sys/kern/kern_synch.c
+++ b/sys/kern/kern_synch.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: kern_synch.c,v 1.181 2022/02/14 11:26:05 claudio Exp $	*/
+/*	$OpenBSD: kern_synch.c,v 1.182 2022/02/19 23:56:18 deraadt Exp $	*/
 /*	$NetBSD: kern_synch.c,v 1.37 1996/04/22 01:38:37 christos Exp $	*/
 
 /*
@@ -222,6 +222,10 @@ msleep(const volatile void *ident, struct mutex *mtx, int priority,
 	if (priority & PCATCH)
 		KERNEL_ASSERT_LOCKED();
 
+#ifdef DDB
+	if (cold == 2)
+		db_stack_dump();
+#endif
 	if (cold || panicstr) {
 		/*
 		 * After a panic, or during autoconfiguration,
-- 
2.20.1