linux-kernel - Re: [PATCH v3 3/3] mm: page_counters: initialize usage using ATOMIC_LONG

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Message-ID: <rlg2wtr2b3l4gdtaga4vaz2v4xzkdc75q35uau4wxlhi4vodlf@nfrgh3tgyhvn>
Date: Fri, 26 Jul 2024 14:37:29 -0700
From: Shakeel Butt <shakeel.butt@...ux.dev>
To: Roman Gushchin <roman.gushchin@...ux.dev>
Cc: Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org, 
	linux-kernel@...r.kernel.org, Johannes Weiner <hannes@...xchg.org>, 
	Michal Hocko <mhocko@...nel.org>, Muchun Song <muchun.song@...ux.dev>
Subject: Re: [PATCH v3 3/3] mm: page_counters: initialize usage using
 ATOMIC_LONG_INIT() macro

On Fri, Jul 26, 2024 at 08:31:10PM GMT, Roman Gushchin wrote:
> When a page_counter structure is initialized, there is no need to
> use an atomic set operation to initialize the usage counter because
> at this point the structure is not visible to anybody else.
> ATOMIC_LONG_INIT() is what should be used in such cases.
> 
> Signed-off-by: Roman Gushchin <roman.gushchin@...ux.dev>

Acked-by: Shakeel Butt <shakeel.butt@...ux.dev>