[src/trunk]: src/sys/miscfs/specfs specfs: Document sn_opencnt, sd_opencnt, s...

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

details:   https://anonhg.NetBSD.org/src/rev/bf97fb78f090
branches:  trunk
changeset: 364511:bf97fb78f090
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Mon Mar 28 12:36:34 2022 +0000

description:
specfs: Document sn_opencnt, sd_opencnt, sd_refcnt.

diffstat:

 sys/miscfs/specfs/specdev.h |  8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diffs (29 lines):

diff -r f75bbaa58e25 -r bf97fb78f090 sys/miscfs/specfs/specdev.h
--- a/sys/miscfs/specfs/specdev.h       Mon Mar 28 12:36:26 2022 +0000
+++ b/sys/miscfs/specfs/specdev.h       Mon Mar 28 12:36:34 2022 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: specdev.h,v 1.46 2021/07/18 23:57:15 dholland Exp $    */
+/*     $NetBSD: specdev.h,v 1.47 2022/03/28 12:36:34 riastradh Exp $   */
 
 /*-
  * Copyright (c) 2008 The NetBSD Foundation, Inc.
@@ -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 @@
        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;