Re: [PATCH] powerpc/32: Remove memory clobber asm constraint on dcbX() functions

Segher Boessenkool
2019-05-06T16:53:42Z

Hi!

On Mon, May 06, 2019 at 04:31:38PM +0000, Christophe Leroy wrote:
> However, I've tried your suggestion below and get unnexpected result.

> >you can do
> >
> > __asm__ __volatile__ ("dcbf %0" : : "Z"(addr) : "memory");
> >
> >to save some insns here and there. ]

This should be "dcbf %y0". Sorry. And not addr -- it needs a mem there,
so deref addr as usual.

Segher