On Fri, Sep 18, 2020 at 02:45:27PM +0200, Christoph Hellwig wrote:
>               }
> -             if (type >= 0
> -                 && unlikely(!access_ok(buf, len))) {
> +             if (type != CHECK_IOVEC_ONLY && unlikely(!access_ok(buf, len))) 
> {

drop the unlikely() at the same time?  if it's really advantageous,
that should be embedded in the access_ok macro.

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