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Message-ID: <490B0987.2050801@tuffmail.co.uk>
Date: Fri, 31 Oct 2008 13:35:03 +0000
From: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
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To: Shivdas Gujare <shivdas.tech@gmail.com>
CC: linux-kernel@vger.kernel.org, beagleboard@googlegroups.com
Subject: Re: Diff between Linux-2.6.27-omap1-dirty and Linux-2.6.27-omap1
 ?
References: <cf70f0210810310608x37f8e3dcu3ab0023891fcb339@mail.gmail.com>
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Shivdas Gujare wrote:
> Hi All,
> 
> I am working on testing Linux-2.6.27 omap kernel on beagle board.
> 
> I cloned kernel from
> git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6.git
> 
> and checked out to tag v2.6.27-omap1, I loaded kernel on beagle board,
> and was able to boot properly like....
> 
> OMAP3 beagleboard.org # bootm 0x80300000
> ## Booting kernel from Legacy Image at 80300000 ...
>    Image Name:   Linux-2.6.27-omap1
>    Image Type:   ARM Linux Kernel Image (uncompressed)
>    Data Size:    1614320 Bytes =  1.5 MB
>    Load Address: 80008000
>    Entry Point:  80008000
>    Verifying Checksum ... OK
>    Loading Kernel Image ... OK
> OK
> 
> Now, I done some operations, like checkout to master, checkout to
> v2.6.26-omap1 and v2.6.25-omap1, loaded corresponding uImages to
> beagle board
> and was able to boot board every time.
> 
> After this, I again checkout to v2.6.27-omap1, compiled and loaded
> uImage to beagleboard
> But this time I am not able to boot the board.
> and Got the message like
> 
> OMAP3 beagleboard.org # bootm 0x80300000
> ## Booting kernel from Legacy Image at 80300000 ...
>    Image Name:   Linux-2.6.27-omap1-dirty
>    Image Type:   ARM Linux Kernel Image (uncompressed)
>    Data Size:    1669176 Bytes =  1.6 MB
>    Load Address: 80008000
>    Entry Point:  80008000
>    Verifying Checksum ... OK
>    Loading Kernel Image ... OK
> OK
> 
> Starting kernel ...
> 
> Uncompressing Linux...........................................................................................................
> done, booting the kernel.
> 
> and it, stucks at here..
> 
> Here, the only difference I observed is "Image Name:
> Linux-2.6.27-omap1" and "Image Name:   Linux-2.6.27-omap1-dirty",
> where uImage with second Image name is not booting.
> 
> I think, I have done something wrong here, while compilation and checkout.
> 
> I just want to know in what cases "-dirty" is appended to linux kernel
> Image Names or anything I done wrong?

-dirty is appended to the version string when there are differences between the working tree and the git HEAD.  In other words, it sounds like you accidentally modified some file.

You can see which files have been modified with "git status".  It will also show extra files under "untracked"; you may see a few arch-specific object files, but all the .o, .ko, etc. files will be hidden by virtue of gitignore.

If the files were modified before the last "git checkout", it would have tried to preserve the modifications.  It would also warn you by listing the files, with an "M" next to their name.

Hope that helps.  You described your problem very well, btw.

Regards
Alan
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