On 10/29/14 12:12, Geert Uytterhoeven wrote: > On Wed, Oct 29, 2014 at 7:15 PM, Josh Triplett <[email protected]> wrote: >> Document several common practices and conventions regarding conditional >> compilation, most notably the preference for ifdefs in headers rather >> than .c files. >> >> Signed-off-by: Josh Triplett <[email protected]> > >> +If you have a function or variable which may potentially go unused in a >> +particular configuration, and the compiler would warn about its definition >> +going unused, mark the definition as __maybe_unused rather than wrapping it >> in >> +a preprocessor conditional. (However, if a function or variable *always* >> goes >> +unused, delete it.) > > Personally, I don't like __maybe_unused. Once it's there, the compiler > will stop warning about it, even if it really becomes unused. > > Apart from that: > Acked-by: Geert Uytterhoeven <[email protected]>
Is the compiler smart enough to delete (discard) the code or data instance if it is unused or is the code or data actually wasting space? -- ~Randy -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
