driver core: add BUS_ATTR_WO() macro

Many bus attributes are write-only, so provide a simple macro for that
to be able to match the other driver core attribute macros.

Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Cc: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/include/linux/device.h b/include/linux/device.h
index 8f88254..767cf19 100644 (file)
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -55,6 +55,8 @@ struct bus_attribute {
        struct bus_attribute bus_attr_##_name = __ATTR_RW(_name)
 #define BUS_ATTR_RO(_name) \
        struct bus_attribute bus_attr_##_name = __ATTR_RO(_name)
+#define BUS_ATTR_WO(_name) \
+       struct bus_attribute bus_attr_##_name = __ATTR_WO(_name)
 
 extern int __must_check bus_create_file(struct bus_type *,
                                        struct bus_attribute *);