linux-kernel - Re: CONFIG_SCSI_G_NCR5380

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Message-Id: <201007211512.03147.linux@rainbow-software.org>
Date:	Wed, 21 Jul 2010 15:12:01 +0200
From:	Ondrej Zary <linux@...nbow-software.org>
To:	Christian Dietrich <qy03fugy@...d.informatik.uni-erlangen.de>
Cc:	"James E.J. Bottomley" <James.Bottomley@...e.de>,
	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	vamos-dev@...informatik.uni-erlangen.de
Subject: Re: CONFIG_SCSI_G_NCR5380_MEM dead?

On Wednesday 21 July 2010, Christian Dietrich wrote:
> Hi all!
>
>         As part of the VAMOS[0] research project at the University of
> Erlangen we are looking at multiple integrity errors in linux'
> configuration system.
>
>         I've been running a check on the drivers/scsi sourcetree for
> config Items not defined in Kconfig and found such a case. Sourcecode
> blocks depending on these Items are not reachable from a vanilla
> kernel -- dead code. I've seen such dead blocks made on purpose
> e.g. while integrating new features into the kernel but generally
> they're just useless.
>
> I encountered, that the CONFIG_SCSI_G_NCR5380_MEM symbol in
> drivers/scsi/g_NCR5380.c isn't defined anywhere. So this codeblocks
> seems to be unreachable. But there is a define in g_NCR5380_mmio.c for
> SCSI_G_NCR5380_MEM with an include of g_NCR5380.c. So i think this is a
> typo-bug and it should be a CONFIG_ define. The code wasn't changed since
> linux is in git, so probably no one has used the mmio module, cause
> there can't be a difference to the normal pio module. If you think this
> ifdefs should be removed, i can send a patch.

I fixed this some time ago but the patches are still not in mainline. You can 
find them in -mm tree: http://userweb.kernel.org/~akpm/mmotm/

-- 
Ondrej Zary
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