linux-kernel - Re: [PATCH] soc: fsl: Remove bogus packed attributes from qman.h

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Message-ID: <20200902013408.GA5012@gondor.apana.org.au>
Date:   Wed, 2 Sep 2020 11:34:08 +1000
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Li Yang <leoyang.li@....com>
Cc:     "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] soc: fsl: Remove bogus packed attributes from qman.h

On Tue, Sep 01, 2020 at 04:40:16PM -0500, Li Yang wrote:
>
> Looks like the CAAM driver and dependent QBMAN driver doesn't support
> COMPILE_TEST yet.  Are you trying to add the support for it?

Yes.

> I think this is a valid concern that if the parent structure doesn't
> meet certain alignment requirements, the alignment for the
> sub-structure cannot be guaranteed.  If we just remove the __packed
> attribute from the parent structure, the compiler could try to add
> padding in the parent structure to fulfill the alignment requirements
> of the sub structure which is not good.  I think the following changes
> are a better fix for the warnings:

This works for me.  Thanks!
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt