diff options
| author | David Gwynne <dlg@cvs.openbsd.org> | 2015-02-09 12:37:19 +0000 |
|---|---|---|
| committer | David Gwynne <dlg@cvs.openbsd.org> | 2015-02-09 12:37:19 +0000 |
| commit | bd35c1918ff930eced7fabbfb0c0f60dff887f47 (patch) | |
| tree | 40fb39d639cb8117bb910ee1f2f30d430926a37f /sys/kern/subr_autoconf.c | |
| parent | c9e9bef7d02e102033f5e1ae8a8a805df2732a7c (diff) | |
use atomic ops to increment and decrement the device ref count in
device_ref and device_unref.
ok guenther@ deraadt@
Diffstat (limited to 'sys/kern/subr_autoconf.c')
| -rw-r--r-- | sys/kern/subr_autoconf.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/sys/kern/subr_autoconf.c b/sys/kern/subr_autoconf.c index 49838565ae5..04378697eaa 100644 --- a/sys/kern/subr_autoconf.c +++ b/sys/kern/subr_autoconf.c @@ -1,4 +1,4 @@ -/* $OpenBSD: subr_autoconf.c,v 1.84 2015/01/22 01:19:51 dlg Exp $ */ +/* $OpenBSD: subr_autoconf.c,v 1.85 2015/02/09 12:37:18 dlg Exp $ */ /* $NetBSD: subr_autoconf.c,v 1.21 1996/04/04 06:06:18 cgd Exp $ */ /* @@ -922,7 +922,7 @@ device_mpath(void) void device_ref(struct device *dv) { - dv->dv_ref++; + atomic_inc_int(&dv->dv_ref); } /* @@ -937,8 +937,7 @@ device_unref(struct device *dv) { struct cfattach *ca; - dv->dv_ref--; - if (dv->dv_ref == 0) { + if (atomic_dec_int_nv(&dv->dv_ref) == 0) { ca = dv->dv_cfdata->cf_attach; free(dv, M_DEVBUF, ca->ca_devsize); } |