linux-kernel - Re: [PATCH v4 1/2] tpm: add ptr to the tpm_space struct to file

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Message-ID: <20180810184331.GA5294@linux.intel.com>
Date:   Fri, 10 Aug 2018 21:43:31 +0300
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Tadeusz Struk <tadeusz.struk@...el.com>
Cc:     flihp@...bit.us, jgg@...pe.ca, linux-integrity@...r.kernel.org,
        linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 1/2] tpm: add ptr to the tpm_space struct to file_priv

On Fri, Aug 10, 2018 at 11:05:17AM -0700, Tadeusz Struk wrote:
> On 08/10/2018 10:27 AM, Jarkko Sakkinen wrote:
> > On Tue, Aug 07, 2018 at 01:27:44PM -0700, Tadeusz Struk wrote:
> >> Add a ptr to struct tpm_space to the file_priv to have an easy
> >> access to it in the async job without the need to allocate memory.
> >> This also allows to consolidate of the write operations for
> >> the two interfaces.
> > 
> > I think the 2nd premise should be the priority and the first premise should
> > be removed as it is not needed in any possible way to justify the
> > change.
> 
> Jarkko,
> The main reason why the pointer to tpm_space struct was added to the
> file_priv was to have access to space in the async job when it is enqueued
> via the /dev/tpm<N> interface. Currently it is only available in tpmrm_priv.
> Otherwise I would need to introduce yet another struct what would consist of
> a ptr file_priv and a ptr to tpm_space and allocate it on every enqueue.
> Much easier was to to it this way. The consolidation was only a side effect
> of this so I think the description is correct.
> Thanks,
> -- 
> Tadeusz

The less dependencies a commit has more easy it is for me pick up. Here
the consodilation is enough to accept the commit but with the current
commit message I cannot apply it without accepting the whole patch set.

/Jarkko