1 files changed, 17 insertions, 0 deletions
diff --git a/sys/arch/sun3/sun3/conf.c b/sys/arch/sun3/sun3/conf.c
index b941d393524..d0ed19c26d8 100644
--- a/sys/arch/sun3/sun3/conf.c
+++ b/sys/arch/sun3/sun3/conf.c
@@ -372,3 +372,20 @@ chrtoblk(dev)
 	return (makedev(blkmaj, minor(dev)));
 }
 
+/*
+ * Convert a character device number to a block device number.
+ */
+dev_t
+blktochr(dev)
+	dev_t dev;
+{
+	int blkmaj = major(dev);
+	int i;
+
+	if (blkmaj >= nblkdev)
+		return (NODEV);
+	for (i = 0; i < sizeof(chrtoblktbl)/sizeof(chrtoblktbl[0]); i++)
+		if (blkmaj == chrtoblktbl[i])
+			return (makedev(i, minor(dev)));
+	return (NODEV);
+}