linux-kernel - Re: [PATCH v8 08/11] tpm, tpm: Implement usage counter for locality

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Message-ID: <3b768ce9-085a-220e-6e9c-154cbe44475f@gmx.de>
Date:   Tue, 18 Oct 2022 09:42:01 +0200
From:   Lino Sanfilippo <LinoSanfilippo@....de>
To:     Lukas Wunner <lukas@...ner.de>
Cc:     peterhuewe@....de, jarkko@...nel.org, jgg@...pe.ca,
        stefanb@...ux.vnet.ibm.com, linux@...ewoehner.de,
        linux-integrity@...r.kernel.org, linux-kernel@...r.kernel.org,
        jandryuk@...il.com, pmenzel@...gen.mpg.de, l.sanfilippo@...bus.com,
        p.rosenberger@...bus.com
Subject: Re: [PATCH v8 08/11] tpm, tpm: Implement usage counter for locality



On 18.10.22 08:25, Lukas Wunner wrote:
> Hm, any reason not to use struct kref for the locality counter?
> Provides correct memory ordering (no mutex needed) and allows for
> calling a release function too upon reaching 0.
>

I already tried this but krefs turned out to be not very usable
in this case. See my post here:

https://lore.kernel.org/lkml/09eefdab-f677-864a-99f7-869d7a8744c2@gmx.de/

Regards,
Lino