Re: [PATCH] mm: poison struct page for ptlock

[Andrew Morton <akpm@osdl.org>]

Hugh Dickins <hugh@veritas.com> wrote:
>
> I'm happy for people to use page->private again.  I thought we
>  ought to try out this minimal patch first, for reassurance that the
>  arches are not using those fields of a pagetable struct page; but that
>  once it's had some exposure, we'd revert the page_private mods elsewhere.
>  There's no point to that wrapper with the union gone, is there?

I'd be inclined to leave it there - we wrap access to most of the rest of
struct page.  It might come in handy for the next brainwave - dunno.