On Tuesday 26 May 2009, Geert Uytterhoeven wrote:

However, you can still improve useability by making the macro return the rc,
instead of letting the caller pass it, cfr. wait_event_timeout() and friends.

Either that, or it should at least use the do { ... } while (0) construct
to make the macro a statement. All multi-line macros need to either
use ({ ... }) or do { ... } while (0) to make sure they behave well.

	Arnd <><