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Subject: Re: [v7 PATCH 06/12] mm: vmscan: add shrinker_info_protected() helper
To:     Yang Shi <shy828301@gmail.com>, guro@fb.com, ktkhai@virtuozzo.com,
        shakeelb@google.com, david@fromorbit.com, hannes@cmpxchg.org,
        mhocko@suse.com, akpm@linux-foundation.org
Cc:     linux-mm@kvack.org, linux-fsdevel@vger.kernel.org,
        linux-kernel@vger.kernel.org
References: <20210209174646.1310591-1-shy828301@gmail.com>
 <20210209174646.1310591-7-shy828301@gmail.com>
From:   Vlastimil Babka <vbabka@suse.cz>
Message-ID: <cbdf0d68-db66-842e-2d4c-261e3e69245d@suse.cz>
Date:   Wed, 10 Feb 2021 19:17:48 +0100
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On 2/9/21 6:46 PM, Yang Shi wrote:
> The shrinker_info is dereferenced in a couple of places via rcu_dereference_protected
> with different calling conventions, for example, using mem_cgroup_nodeinfo helper
> or dereferencing memcg->nodeinfo[nid]->shrinker_info.  And the later patch
> will add more dereference places.
> 
> So extract the dereference into a helper to make the code more readable.  No
> functional change.
> 
> Signed-off-by: Yang Shi <shy828301@gmail.com>

Acked-by: Vlastimil Babka <vbabka@suse.cz>