Clean up remaining comparsions to NULL reported by checkpatch. x == NULL -> !x x != NULL -> x Signed-off-by: Michael Straube <straube.linux@gmail.com> Link: https://lore.kernel.org/r/20200929062847.23985-2-straube.linux@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>