linux-kernel - Re: [PATCH 0/4] char-TPM: Adjustments for ten function implementations

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Message-ID: <1508255833.3129.33.camel@HansenPartnership.com>
Date:   Tue, 17 Oct 2017 08:57:13 -0700
From:   James Bottomley <James.Bottomley@...senPartnership.com>
To:     SF Markus Elfring <elfring@...rs.sourceforge.net>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        linux-integrity@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Cc:     Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Corentin Labbe <clabbe.montjoie@...il.com>,
        Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
        Jerry Snitselaar <jsnitsel@...hat.com>,
        Kenneth Goldman <kgold@...ux.vnet.ibm.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Nayna Jain <nayna@...ux.vnet.ibm.com>,
        Paul Mackerras <paulus@...ba.org>,
        Peter Hüwe <PeterHuewe@....de>,
        Stefan Berger <stefanb@...ux.vnet.ibm.com>,
        LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 0/4] char-TPM: Adjustments for ten function
 implementations

On Tue, 2017-10-17 at 11:25 +0200, SF Markus Elfring wrote:
> > 
> > Fixes is only for bug fixes.  These don't fix any bugs.
> 
> How do you distinguish these in questionable source code
> from other error categories or software weaknesses?

A style change is one that doesn't change the effect of the execution.
 These don't actually even change the assembly, so there's programmatic
proof they're not fixing anything.

Bug means potentially user visible fault.  In any bug fix commit you
should document the fault and its effects on users so those backporting
can decide if they care or not.

James