Re: [v2 PATCH] RISC-V: Optimize tlb flush path.

hch
2019-08-20T07:16:47Z

On Tue, Aug 20, 2019 at 09:14:58AM +0200, Andreas Schwab wrote:
> On Aug 19 2019, "hch@infradead.org" <hch@infradead.org> wrote:
>
> > This looks a little odd to m and assumes we never pass a size smaller
> > than PAGE_SIZE. Whule that is probably true, why not something like:
> >
> > if (size < PAGE_SIZE && size != -1)
>
> ITYM size <= PAGE_SIZE. And since size is unsigned it cannot be == -1
> at the same time.

Yes, the <= was obvious, that's what you get for hacking up a demo
patch on the plan. And true for the -1. That being said I find the
-1 convention rather annoying, a ULONG_MAX in the callers would be
a lot more obvious.