linux-kernel - default enable sparse __CHECK_ENDIAN__ (was: Re: [PATCH v7 2/3] net: Add Keystone NetCP ethernet driver)

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Message-ID: <1418267099.18092.28.camel@perches.com>
Date:	Wed, 10 Dec 2014 19:04:59 -0800
From:	Joe Perches <joe@...ches.com>
To:	David Miller <davem@...emloft.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Christopher Li <sparse@...isli.org>,
	Michal Marek <mmarek@...e.cz>
Cc:	m-karicheri2@...com, netdev@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org, robh+dt@...nel.org,
	grant.likely@...aro.org, linux-sparse@...r.kernel.org
Subject: default enable sparse __CHECK_ENDIAN__ (was: Re: [PATCH v7 2/3]
 net: Add Keystone NetCP ethernet driver)

On Wed, 2014-12-10 at 20:41 -0500, David Miller wrote:
> From: Murali Karicheri <m-karicheri2@...com>
> > Are you referring to the static code analyser sparse that is invoked
> > through?
> You have to explicitly enable endian checking, it's not on by
> default.

There don't seem to be thousands of warnings anymore.

Maybe it's time to default enable it when using C=?

from: Documentation/sparse.txt:

The optional make variable CF can be used to pass arguments to sparse.  The
build system passes -Wbitwise to sparse automatically.  To perform endianness
checks, you may define __CHECK_ENDIAN__:

        make C=2 CF="-D__CHECK_ENDIAN__"

These checks are disabled by default as they generate a host of warnings.



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