ERR_PTR pattern in phylib

[Maciej W. Rozycki]

On Thu, 2 Sep 2010, David Miller wrote:

> >  Arguably using a union here would make things cleaner and any reasonable 
> > ABI will place small unions used as arguments or return values in 
> > registers, but I'm not sure if the cost of the rewrite is worth the 
> 
> Well, sparc 32-bit's ABI for one is "not reasonable" and these return
> values will always get stack slots and passed back by reference.

 So that makes it two -- together with MIPS o32. ;)  Still used by 
everybody concerned as contraptions tend to stick. :/  That doesn't make 
it reasonable though.  Nor me to push the union approach -- that's an 
elegant approach that would probably give us less than take in return.

  Maciej