[Linux-kernel-mentees] [PATCH] net: batman-adv: Use built-in RCU list checking

Madhuparna Bhowmik madhuparnabhowmik10 at gmail.com
Mon Feb 17 12:05:25 UTC 2020

On Sun, Feb 16, 2020 at 05:17:36PM +0100, Sven Eckelmann wrote:
> 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.
Hi Sven,
I have been working on similar issues (passing cond argument to
list_for_each_entry_Rcu()). That's why may be I didn't notice that in
this case rcu variant is not required.
Thank you for taking a closer look and fixing it the right way.


> 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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