On May 24, 2006, at 4:14 PM, Wolfgang Solfrank wrote:

> All bus_space* functions are explicitly allowed (by the manual) to be
> implemented as macros.  Which in my world means that the user is not
> allowed to rely on arguments with side effects to be evaluated.  Or
> for that matter, to be evaluated only once.

It's meant to consume them from the perspective of avoiding compiler  
warnings.

-- thorpej