From 3c78bc9451ce7ce927aaecc9f8e5113de7023a9c Mon Sep 17 00:00:00 2001
From: tb <tb@openbsd.org>
Date: Thu, 7 Apr 2022 09:37:32 +0000
Subject: [PATCH] Fix kernel builds with pseudo-device rd

Make the cf_attach member of struct cfdata const and sprinkle a few
const into subr_autoconf.c to make this work. Fixes the compilation
of sys/dev/rd.c with newly const rd_ca.

ok miod (who had a similar diff)
---
 sys/kern/subr_autoconf.c | 12 ++++++------
 sys/sys/device.h         |  4 ++--
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/sys/kern/subr_autoconf.c b/sys/kern/subr_autoconf.c
index eccf09d10e8..a35b2224724 100644
--- a/sys/kern/subr_autoconf.c
+++ b/sys/kern/subr_autoconf.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: subr_autoconf.c,v 1.95 2021/10/26 16:29:49 deraadt Exp $	*/
+/*	$OpenBSD: subr_autoconf.c,v 1.96 2022/04/07 09:37:32 tb Exp $	*/
 /*	$NetBSD: subr_autoconf.c,v 1.21 1996/04/04 06:06:18 cgd Exp $	*/
 
 /*
@@ -348,7 +348,7 @@ config_attach(struct device *parent, void *match, void *aux, cfprint_t print)
 	struct cfdata *cf;
 	struct device *dev;
 	struct cfdriver *cd;
-	struct cfattach *ca;
+	const struct cfattach *ca;
 
 	mtx_enter(&autoconf_attdet_mtx);
 	while (autoconf_attdet < 0)
@@ -428,7 +428,7 @@ config_make_softc(struct device *parent, struct cfdata *cf)
 {
 	struct device *dev;
 	struct cfdriver *cd;
-	struct cfattach *ca;
+	const struct cfattach *ca;
 
 	cd = cf->cf_driver;
 	ca = cf->cf_attach;
@@ -507,7 +507,7 @@ int
 config_detach(struct device *dev, int flags)
 {
 	struct cfdata *cf;
-	struct cfattach *ca;
+	const struct cfattach *ca;
 	struct cfdriver *cd;
 	int rv = 0, i;
 #ifdef DIAGNOSTIC
@@ -816,7 +816,7 @@ config_detach_children(struct device *parent, int flags)
 int
 config_suspend(struct device *dev, int act)
 {
-	struct cfattach *ca = dev->dv_cfdata->cf_attach;
+	const struct cfattach *ca = dev->dv_cfdata->cf_attach;
 	int r;
 
 	device_ref(dev);
@@ -998,7 +998,7 @@ device_ref(struct device *dv)
 void
 device_unref(struct device *dv)
 {
-	struct cfattach *ca;
+	const struct cfattach *ca;
 
 	if (atomic_dec_int_nv(&dv->dv_ref) == 0) {
 		ca = dv->dv_cfdata->cf_attach;
diff --git a/sys/sys/device.h b/sys/sys/device.h
index 1ac19bb65a7..1d1b5bcf80a 100644
--- a/sys/sys/device.h
+++ b/sys/sys/device.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: device.h,v 1.62 2022/02/16 06:41:27 deraadt Exp $	*/
+/*	$OpenBSD: device.h,v 1.63 2022/04/07 09:37:32 tb Exp $	*/
 /*	$NetBSD: device.h,v 1.15 1996/04/09 20:55:24 cgd Exp $	*/
 
 /*
@@ -89,7 +89,7 @@ TAILQ_HEAD(devicelist, device);
  * Configuration data (i.e., data placed in ioconf.c).
  */
 struct cfdata {
-	struct	cfattach *cf_attach;	/* config attachment */
+	const struct	cfattach *cf_attach;	/* config attachment */
 	struct	cfdriver *cf_driver;	/* config driver */
 	short	cf_unit;		/* unit number */
 	short	cf_fstate;		/* finding state (below) */
-- 
2.20.1