On Wed, 2021-05-19 at 09:38 -0500, Segher Boessenkool wrote: > On Wed, May 19, 2021 at 06:42:40PM +1000, Nicholas Piggin wrote: > > Excerpts from Joakim Tjernlund's message of May 19, 2021 6:08 pm: > > > I always figured the ppc way was superior. It begs the question if not the other archs should > > > change instead? > > > > It is superior in some ways, not enough to be worth being different. > > The PowerPC syscall ABI *requires* using cr0.3 for indicating errors, > you will have to do that whether you conflate the concepts of return > code and error indicator or not! > > > Other archs are unlikely to change because it would be painful for > > not much benefit. > > Other archs cannot easily change for much the same reason :-) Really? I figured you could just add extra error indication in kernel syscall I/F. Eventually user space could migrate to the new indication. Jocke
