On 22 June 2014 23:25, Yoann Padioleau <pad@fb.com> wrote:

> if(up != p && (p->wired == nil || p->wired == MACHP(m->machno))
>    m->readied = p;
>

yes, because on 386 m is effectively a constant. the code was written with
extern register Mach *m in mind.