From 5d76604145789b4624c77e8e5ddd9f9a43bc4b44 Mon Sep 17 00:00:00 2001
From: Mark Johnston <markj@FreeBSD.org>
Date: Sun, 27 Oct 2013 16:18:48 +0000
Subject: [PATCH] If the initial attempt to open /dev/ksyms fails, kldload the
 ksyms module and retry.

---
 cddl/contrib/opensolaris/cmd/lockstat/sym.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/cddl/contrib/opensolaris/cmd/lockstat/sym.c b/cddl/contrib/opensolaris/cmd/lockstat/sym.c
index 78b27d2bdcd2..1aa77ad3f314 100644
--- a/cddl/contrib/opensolaris/cmd/lockstat/sym.c
+++ b/cddl/contrib/opensolaris/cmd/lockstat/sym.c
@@ -179,8 +179,19 @@ symtab_init(void)
 	size_t		sz;
 #endif
 
+#if defined(__FreeBSD__)
+	if ((fd = open("/dev/ksyms", O_RDONLY)) == -1) {
+		if (errno == ENOENT && modfind("ksyms") == -1) {
+			kldload("ksyms");
+			fd = open("/dev/ksyms", O_RDONLY);
+		}
+		if (fd == -1)
+			return (-1);
+	}
+#else
 	if ((fd = open("/dev/ksyms", O_RDONLY)) == -1)
 		return (-1);
+#endif
 
 #if defined(sun)
 	(void) elf_version(EV_CURRENT);