linux-kernel - Re: [tpmdd-devel] [PATCH 2/2] tpm: fix bad constant expressions

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Date:   Tue, 20 Sep 2016 12:56:05 +0300
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     "Winkler, Tomas" <tomas.winkler@...el.com>
Cc:     Peter Huewe <peterhuewe@....de>,
        "moderated list:TPM DEVICE DRIVER" 
        <tpmdd-devel@...ts.sourceforge.net>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [tpmdd-devel] [PATCH 2/2] tpm: fix bad constant expressions

On Tue, Sep 20, 2016 at 07:08:40AM +0000, Winkler, Tomas wrote:
> 
> > -----Original Message-----
> > From: Jarkko Sakkinen [mailto:jarkko.sakkinen@...ux.intel.com]
> > Sent: Monday, September 19, 2016 23:22
> > To: Peter Huewe <peterhuewe@....de>
> > Cc: moderated list:TPM DEVICE DRIVER <tpmdd-
> > devel@...ts.sourceforge.net>; open list <linux-kernel@...r.kernel.org>
> > Subject: [tpmdd-devel] [PATCH 2/2] tpm: fix bad constant expressions
> > 
> > Sparse reports "bad constant expression" for the use of cpu_to_be32 inside
> > enums tpm_capabilities and tpm_sub_capabilities. Even though it is probably
> > expanded to a constant expression, it is probably cleaner not to use it there.
> 
> 
> Swap macros were rewritten due to possible compiler bug https://lkml.org/lkml/2016/5/2/597
> And the warning is actually a bug in sparse, it fails to detect constant expression now.

I still think that these must be change in order to have some
consistency in the subsystem. Now there are two differing
conventions.

/Jarkko