From 9b385e25cc13e3351d5a1ddb69daea832994952c Mon Sep 17 00:00:00 2001
From: Taylor R Campbell <riastradh@NetBSD.org>
Date: Mon, 31 Jan 2022 17:03:31 +0000
Subject: [PATCH 24/37] specfs: Document sn_opencnt, sd_opencnt, sd_refcnt.

---
 sys/miscfs/specfs/specdev.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/sys/miscfs/specfs/specdev.h b/sys/miscfs/specfs/specdev.h
index 621c103e80b1..7e1dd84fe330 100644
--- a/sys/miscfs/specfs/specdev.h
+++ b/sys/miscfs/specfs/specdev.h
@@ -66,7 +66,7 @@
 typedef struct specnode {
 	vnode_t		*sn_next;
 	struct specdev	*sn_dev;
-	u_int		sn_opencnt;
+	u_int		sn_opencnt;	/* # of opens, share of sd_opencnt */
 	dev_t		sn_rdev;
 	bool		sn_gone;
 } specnode_t;
@@ -75,8 +75,8 @@ typedef struct specdev {
 	struct mount	*sd_mountpoint;
 	struct lockf	*sd_lockf;
 	vnode_t		*sd_bdevvp;
-	u_int		sd_opencnt;
-	u_int		sd_refcnt;
+	u_int		sd_opencnt;	/* # of opens; close when ->0 */
+	u_int		sd_refcnt;	/* # of specnodes referencing this */
 	dev_t		sd_rdev;
 } specdev_t;