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Date:   Fri, 11 Jun 2021 14:34:02 +0200
From:   David Sterba <dsterba@suse.cz>
To:     Christophe Leroy <christophe.leroy@csgroup.eu>
Cc:     Chris Mason <clm@fb.com>, Josef Bacik <josef@toxicpanda.com>,
        David Sterba <dsterba@suse.com>, linux-kernel@vger.kernel.org,
        linuxppc-dev@lists.ozlabs.org, linux-btrfs@vger.kernel.org,
        linux-hexagon@vger.kernel.org
Subject: Re: [PATCH] fs: btrfs: Disable BTRFS on platforms having 256K pages
Message-ID: <20210611123402.GD28158@twin.jikos.cz>
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        Christophe Leroy <christophe.leroy@csgroup.eu>,
        Chris Mason <clm@fb.com>, Josef Bacik <josef@toxicpanda.com>,
        David Sterba <dsterba@suse.com>, linux-kernel@vger.kernel.org,
        linuxppc-dev@lists.ozlabs.org, linux-btrfs@vger.kernel.org,
        linux-hexagon@vger.kernel.org
References: <a16c31f3caf448dda5d9315e056585b6fafc22c5.1623302442.git.christophe.leroy@csgroup.eu>
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On Thu, Jun 10, 2021 at 05:23:02AM +0000, Christophe Leroy wrote:
> With a config having PAGE_SIZE set to 256K, BTRFS build fails
> with the following message
> 
>  include/linux/compiler_types.h:326:38: error: call to '__compiletime_assert_791' declared with attribute error: BUILD_BUG_ON failed: (BTRFS_MAX_COMPRESSED % PAGE_SIZE) != 0
> 
> BTRFS_MAX_COMPRESSED being 128K, BTRFS cannot support platforms with
> 256K pages at the time being.
> 
> There are two platforms that can select 256K pages:
>  - hexagon
>  - powerpc
> 
> Disable BTRFS when 256K page size is selected.
> 
> Reported-by: kernel test robot <lkp@intel.com>
> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>

With updated changelog added to misc-next, thanks.