linux-kernel - Re: [PATCH] Documentation: remove 'linux' from dontdiff file

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Message-ID: <4F8C78AC.8000202@landley.net>
Date:	Mon, 16 Apr 2012 14:53:16 -0500
From:	Rob Landley <rob@...dley.net>
To:	richard -rw- weinberger <richard.weinberger@...il.com>
CC:	H Hartley Sweeten <hartleys@...ionengravers.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>
Subject: Re: [PATCH] Documentation: remove 'linux' from dontdiff file

On 04/13/2012 06:09 PM, richard -rw- weinberger wrote:
> On Sat, Apr 14, 2012 at 1:06 AM, H Hartley Sweeten
> <hartleys@...ionengravers.com> wrote:
>> Hmm.. So we are suppressing an entire branch of the directory tree (a
>> fairly major one at that) for one file?
>>
> 
> No, we need a better solution.
> Your patch replaces a regression with another one...

Could somebody explain the purpose of this file to me?  According to
SubmittingPatches:

> To create a patch for multiple files, you should unpack a "vanilla",
> or unmodified kernel source tree, and generate a diff against your
> own source tree.  For example:
> 
>         MYSRC= /devel/linux-2.6
> 
>         tar xvfz linux-2.6.12.tar.gz
>         mv linux-2.6.12 linux-2.6.12-vanilla
>         diff -uprN -X linux-2.6.12-vanilla/Documentation/dontdiff \
>                 linux-2.6.12-vanilla $MYSRC > /tmp/patch
> 
> "dontdiff" is a list of files which are generated by the kernel during
> the build process, and should be ignored in any diff(1)-generated
> patch.  The "dontdiff" file is included in the kernel tree in
> 2.6.12 and later.  For earlier kernel versions, you can get it
> from <http://www.xenotime.net/linux/doc/dontdiff>.

Allowing a vmlinux equivalent in there would produce "binary files
differ", which is noise but not a regression. (The resulting patch
wouldn't functionally differ when applied.)

If it's really bothersome, possibly that hunk should have instructions
that you should compare against a _clean_ tree you've done "make
distclean" on?

Rob
-- 
GNU/Linux isn't: Linux=GPLv2, GNU=GPLv3+, they can't share code.
Either it's "mere aggregation", or a license violation.  Pick one.
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