linux-kernel - Re: [PATCH] net: batman-adv: Use built-in RCU list checking

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Message-ID: <14125758.fD4hS3u3Vl@sven-edge>
Date:   Sun, 16 Feb 2020 17:17:36 +0100
From:   Sven Eckelmann <sven@...fation.org>
To:     Madhuparna Bhowmik <madhuparnabhowmik10@...il.com>
Cc:     mareklindner@...mailbox.ch, sw@...onwunderlich.de, a@...table.cc,
        davem@...emloft.net, b.a.t.m.a.n@...ts.open-mesh.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        joel@...lfernandes.org, frextrite@...il.com,
        linux-kernel-mentees@...ts.linuxfoundation.org
Subject: Re: [PATCH] net: batman-adv: Use built-in RCU list checking

On Sunday, 16 February 2020 16:52:44 CET Madhuparna Bhowmik wrote:
[...]
> > I understand this part. I was asking how you've identified them. Did you use 
> > any tool for that? coccinelle, sparse, ...
> 
> Not really, I did it manually by inspecting each occurence.

In that case, I don't understand why you didn't convert the occurrences from 
hlist_for_each_entry_rcu to hlist_for_each_entry [1]. Because a manual
inspection should have noticed that there will always be the lock around
these ones.

KInd regards,
	Sven

[1] https://www.kernel.org/doc/html/v5.6-rc1/RCU/whatisRCU.html#analogy-with-reader-writer-locking
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