Re: [Xen-devel] [PATCH v3 08/13] xen/pvcalls: implement accept command

[Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>]

> > +
> > +    ret = bedata->rsp[req_id].ret;
> You can just return bedata->rsp[req_id].ret;
Or maybe not. The slot may get reused by the time you get to the end.

-boris

> -boris
>
> > +    /* read ret, then set this rsp slot to be reused */
> > +    smp_mb();
> > +    WRITE_ONCE(bedata->rsp[req_id].req_id, PVCALLS_INVALID_ID);
> > +    WRITE_ONCE(map->passive.inflight_req_id, PVCALLS_INVALID_ID);
> > +    return ret;
> > +}
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