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Assert ownership of alldevs_mtx, as required for config_makeroom.

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The one caller in config_unit_alloc guarantees ownership, via
config_alldevs_enter and preserved by config_makeroom.
This commit is contained in:
riastradh 2017-03-20 01:05:03 +00:00
parent f7e6ff90f6
commit 1d7e0698c7
1 changed files with 4 additions and 2 deletions
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6
sys/kern/subr_autoconf.c
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@ -1,4 +1,4 @@
/* $NetBSD: subr_autoconf.c,v 1.248 2017/03/20 00:30:03 riastradh Exp $ */
/* $NetBSD: subr_autoconf.c,v 1.249 2017/03/20 01:05:03 riastradh Exp $ */
/*
* Copyright (c) 1996, 2000 Christopher G. Demetriou
@ -77,7 +77,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: subr_autoconf.c,v 1.248 2017/03/20 00:30:03 riastradh Exp $");
__KERNEL_RCSID(0, "$NetBSD: subr_autoconf.c,v 1.249 2017/03/20 01:05:03 riastradh Exp $");
#ifdef _KERNEL_OPT
#include "opt_ddb.h"
@ -1166,6 +1166,7 @@ config_makeroom(int n, struct cfdriver *cd)
int ondevs, nndevs;
device_t *osp, *nsp;
KASSERT(mutex_owned(&alldevs_mtx));
alldevs_nwrite++;
for (nndevs = MAX(4, cd->cd_ndevs); nndevs <= n; nndevs += nndevs)
@ -1209,6 +1210,7 @@ config_makeroom(int n, struct cfdriver *cd)
mutex_enter(&alldevs_mtx);
}
}
KASSERT(mutex_owned(&alldevs_mtx));
alldevs_nwrite--;
}