linux-kernel - Re: [PATCH v2] mm: introduce PAGEFLAGS_MASK to replace ((1UL << NR_PAGEFLAGS)

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Message-ID: <YR6ejLTuWp2Gm12H@cmpxchg.org>
Date:   Thu, 19 Aug 2021 14:10:20 -0400
From:   Johannes Weiner <hannes@...xchg.org>
To:     Muchun Song <songmuchun@...edance.com>
Cc:     guro@...com, mhocko@...nel.org, akpm@...ux-foundation.org,
        shakeelb@...gle.com, vdavydov.dev@...il.com, willy@...radead.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH v2] mm: introduce PAGEFLAGS_MASK to replace ((1UL <<
 NR_PAGEFLAGS) - 1)

On Thu, Aug 19, 2021 at 11:07:12PM +0800, Muchun Song wrote:
> Instead of hard-coding ((1UL << NR_PAGEFLAGS) - 1) everywhere, introducing
> PAGEFLAGS_MASK to make the code clear to get the page flags.
> 
> Signed-off-by: Muchun Song <songmuchun@...edance.com>

LGTM.

Acked-by: Johannes Weiner <hannes@...xchg.org>