linux-kernel - Re: Suppressing a plus from setlocalversion

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Message-ID: <alpine.DEB.2.00.1108151600400.22798@chino.kir.corp.google.com>
Date:	Mon, 15 Aug 2011 16:06:04 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Pavel Roskin <proski@....org>
cc:	linux-kernel@...r.kernel.org
Subject: Re: Suppressing a plus from setlocalversion

On Mon, 15 Aug 2011, Pavel Roskin wrote:

> Hello!
> 
> There is one annoyance in the build system that I cannot work around.

That's surprising since you actually state the workaround, i.e. using 
LOCALVERSION= with make, yourself.

> Before I attempt hacking the code, I'd like to make sure I'm not
> missing anything obvious.
> 
> Suppose that I have a kernel version 3.1-rc2.  I want to test some patch
> for some code that is compiled as a module.  I change the code and
> create a patch with STGit.  I recompile the modules, install them by
> "make module_install", unload the module I patched, load it again
> and find that there is no effect from my change.  It turns out that the
> modules were installed to "/lib/modules/3.1.0-rc2+" and the plus was
> added by scripts/localversion because the source tree is now modified.
> 

Yes, because the kernel you've produced is no longer 3.1.0-rc2, it is 
modified.  If you want to do something else locally, then you can always 
use LOCALVERSION=.

The + was added to stop falsely identifying kernels as a specific version 
when they are modified by default.  Sorry if you forget to override it 
sometimes.
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