clang warns if inline functions aren't used. By making them __maybe_unused there is no warning for either gcc nor clang. Change-Id: Ia059fceaa6f12d3ce4e8f31a3ff04a6b1159ed2c Signed-off-by: Behan Webster <behanw@converseincode.com> Suggested-by: Arnd Bergmann <arnd@arndb.de> Cc: Arnd Bergmann <arnd@arndb.de> Cc: "Christopher Li" <sparse@chrisli.org> Signed-off-by: Greg Hackmann <ghackmann@google.com>