linux-kernel - Re: [PATCH v2 10/13] mm/munlock: mlock_page() munlock

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Message-ID: <YgwvoaJj5BqpMOiR@casper.infradead.org>
Date:   Tue, 15 Feb 2022 22:56:33 +0000
From:   Matthew Wilcox <willy@...radead.org>
To:     Hugh Dickins <hughd@...gle.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Michal Hocko <mhocko@...e.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        "Kirill A. Shutemov" <kirill@...temov.name>,
        David Hildenbrand <david@...hat.com>,
        Alistair Popple <apopple@...dia.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Rik van Riel <riel@...riel.com>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Yu Zhao <yuzhao@...gle.com>, Greg Thelen <gthelen@...gle.com>,
        Shakeel Butt <shakeelb@...gle.com>,
        Yang Li <yang.lee@...ux.alibaba.com>,
        SeongJae Park <sj@...nel.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH v2 10/13] mm/munlock: mlock_page() munlock_page() batch
 by pagevec

On Tue, Feb 15, 2022 at 01:02:30PM -0800, Hugh Dickins wrote:
> On Tue, 15 Feb 2022, Matthew Wilcox wrote:
> > > +#define mlock_new(page) ((struct page *)((unsigned long)page + NEW_PAGE))
> > 
> > I'm going to change this to:
> > 
> > static inline struct page *mlock_lru(struct page *page)
> > {
> > 	return (struct page *)((unsigned long)page + LRU_PAGE);
> > }
> > 
> > (mutatis mutandi for mlock_new)
> 
> Okay, thanks.  (You're not naming your folio "page" :-?)

Worse, I tried passing it '&folio->page'.  That produced some ...
interesting compiler error messages.