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Re: [dm-devel] [PATCH 2.6.20] updated dm-loop patch



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devzero web de wrote:
> Hi Bryn, 
> 
> with this patch and also with 0.415 i have the following problem when compiling it with stock 2.6.20 :
> 
>   Building modules, stage 2.
>   MODPOST 1 modules
> WARNING: "invalidate_mapping_pages" [drivers/md/dm-loop.ko] undefined!
> make[1]: *** [__modpost] Error 1
> make: *** [modules] Error 2
> 
> i found , that this was due to missing 
> 
> EXPORT_SYMBOL(invalidate_mapping_pages);
> 
> in mm/truncate.c 
> 
> i found 
> http://lkml.org/lkml/2007/1/3/154
> 
> it looks that this didn`t go into 2.6.20 and we need at least 2.6.20-git11 ?
> changelog at http://www.kernel.org/pub/linux/kernel/v2.6/snapshots/patch-2.6.20-git11.log telling that it had just had been merged on 10th of february:
> 

Hi Roland,

That's right - I keep my git tree fairly close to upstream, so as soon
as the patch that deprecated invalidate_inode_pages was merged, I
converted dm-loop to use invalidate_mapping_pages instead.

This means that dm-loop will build without warnings on the latest
kernel.org tree but it does mean that you will need the additional patch
you referenced if you want to apply it to a plain 2.6.20 kernel.

Kind regards,

Bryn.


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