D53451.1783168848.diff
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D53451.1783168848.diff
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	diff --git a/sys/kern/subr_bus.c b/sys/kern/subr_bus.c
	--- a/sys/kern/subr_bus.c
	+++ b/sys/kern/subr_bus.c
	@@ -624,7 +624,12 @@
	devclass_t
	devclass_create(const char *classname)
	{
	- return (devclass_find_internal(classname, NULL, TRUE));
	+ devclass_t rv;
	+
	+ bus_topo_lock();
	+ rv = devclass_find_internal(classname, NULL, TRUE);
	+ bus_topo_unlock();
	+ return (rv);
	}

	/**
	@@ -638,7 +643,12 @@
	devclass_t
	devclass_find(const char *classname)
	{
	- return (devclass_find_internal(classname, NULL, FALSE));
	+ devclass_t rv;
	+
	+ bus_topo_lock();
	+ rv = devclass_find_internal(classname, NULL, FALSE);
	+ bus_topo_unlock();
	+ return (rv);
	}

	/**