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

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Message-ID: <YR5+iC8KDQP4+6ms@carbon.dhcp.thefacebook.com>
Date:   Thu, 19 Aug 2021 08:53:44 -0700
From:   Roman Gushchin <guro@...com>
To:     Muchun Song <songmuchun@...edance.com>
CC:     <hannes@...xchg.org>, <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>

Reviewed-by: Roman Gushchin <guro@...com>

Thanks!