[src/trunk]: src/sys/dev/dkwedge dk(4): Take a read-lock on dkwedges_lock if ...

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

details:   https://anonhg.NetBSD.org/src/rev/22c475dd81d7
branches:  trunk
changeset: 374391:22c475dd81d7
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Fri Apr 21 18:44:18 2023 +0000

description:
dk(4): Take a read-lock on dkwedges_lock if we're only reading.

- dkwedge_find_by_name
- dkwedge_find_by_parent
- dkwedge_print_wnames

diffstat:

 sys/dev/dkwedge/dk.c |  10 +++++-----
 1 files changed, 5 insertions(+), 5 deletions(-)

diffs (45 lines):

diff -r 84dc29b8e1e3 -r 22c475dd81d7 sys/dev/dkwedge/dk.c
--- a/sys/dev/dkwedge/dk.c      Fri Apr 21 18:31:00 2023 +0000
+++ b/sys/dev/dkwedge/dk.c      Fri Apr 21 18:44:18 2023 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: dk.c,v 1.144 2023/04/21 18:31:00 riastradh Exp $       */
+/*     $NetBSD: dk.c,v 1.145 2023/04/21 18:44:18 riastradh Exp $       */
 
 /*-
  * Copyright (c) 2004, 2005, 2006, 2007 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: dk.c,v 1.144 2023/04/21 18:31:00 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: dk.c,v 1.145 2023/04/21 18:44:18 riastradh Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_dkwedge.h"
@@ -877,7 +877,7 @@ dkwedge_find_by_wname(const char *wname)
        struct dkwedge_softc *sc;
        int i;
 
-       rw_enter(&dkwedges_lock, RW_WRITER);
+       rw_enter(&dkwedges_lock, RW_READER);
        for (i = 0; i < ndkwedges; i++) {
                if ((sc = dkwedges[i]) == NULL)
                        continue;
@@ -900,7 +900,7 @@ device_t
 dkwedge_find_by_parent(const char *name, size_t *i)
 {
 
-       rw_enter(&dkwedges_lock, RW_WRITER);
+       rw_enter(&dkwedges_lock, RW_READER);
        for (; *i < (size_t)ndkwedges; (*i)++) {
                struct dkwedge_softc *sc;
                if ((sc = dkwedges[*i]) == NULL)
@@ -920,7 +920,7 @@ dkwedge_print_wnames(void)
        struct dkwedge_softc *sc;
        int i;
 
-       rw_enter(&dkwedges_lock, RW_WRITER);
+       rw_enter(&dkwedges_lock, RW_READER);
        for (i = 0; i < ndkwedges; i++) {
                if ((sc = dkwedges[i]) == NULL)
                        continue;