ethtool: Add and use ethnl_update_bool.

	*mod = true;

}

/**

 * ethnl_update_bool() - updateb bool used as bool from NLA_U8 attribute

 * @dst:  value to update

 * @attr: netlink attribute with new value or null

 * @mod:  pointer to bool for modification tracking

 *

 * Use the bool value from NLA_U8 netlink attribute @attr to set bool variable

 * pointed to by @dst to 0 (if zero) or 1 (if not); do nothing if @attr is

 * null. Bool pointed to by @mod is set to true if this function changed the

 * logical value of *dst, otherwise it is left as is.

 */

static inline void ethnl_update_bool(bool *dst, const struct nlattr *attr,

				     bool *mod)

{

	u8 val;

	if (!attr)

		return;

	val = !!nla_get_u8(attr);

	if (!!*dst == val)

		return;

	*dst = val;

	*mod = true;

}

/**

 * ethnl_update_binary() - update binary data from NLA_BINARY attribute

 * @dst:  value to update