D53992.diff
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	diff --git a/sys/dev/ofw/ofw_bus_subr.h b/sys/dev/ofw/ofw_bus_subr.h
	--- a/sys/dev/ofw/ofw_bus_subr.h
	+++ b/sys/dev/ofw/ofw_bus_subr.h
	@@ -117,6 +117,9 @@
	int ofw_bus_is_compatible_strict(device_t, const char *);
	int ofw_bus_node_is_compatible(phandle_t, const char *);

	+/* Check if machine (root node) is compatible */
	+bool ofw_bus_is_machine_compatible(const char *);
	+
	/*
	* Helper routine to search a list of compat properties. The table is
	* terminated by an entry with a NULL compat-string pointer; a pointer to that
	diff --git a/sys/dev/ofw/ofw_bus_subr.c b/sys/dev/ofw/ofw_bus_subr.c
	--- a/sys/dev/ofw/ofw_bus_subr.c
	+++ b/sys/dev/ofw/ofw_bus_subr.c
	@@ -298,6 +298,15 @@
	return (0);
	}

	+bool
	+ofw_bus_is_machine_compatible(const char *compat)
	+{
	+ phandle_t root;
	+
	+ root = OF_finddevice("/");
	+ return (ofw_bus_node_is_compatible(root, compat) != 0);
	+}
	+
	const struct ofw_compat_data *
	ofw_bus_search_compatible(device_t dev, const struct ofw_compat_data *compat)
	{