From: David Sterba <dsterba@suse.cz>
To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Qu Wenruo <wqu@suse.com>, Chris Mason <clm@fb.com>,
Josef Bacik <josef@toxicpanda.com>,
David Sterba <dsterba@suse.com>,
linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org,
noreply@ellerman.id.au
Subject: Re: [PATCH -next] btrfs: lzo: Mask instead of divide to fix 32-bit build
Date: Wed, 6 Oct 2021 01:23:21 +0200 [thread overview]
Message-ID: <20211005232321.GK9286@suse.cz> (raw)
In-Reply-To: <20211005093406.1241222-1-geert@linux-m68k.org>
On Tue, Oct 05, 2021 at 11:34:06AM +0200, Geert Uytterhoeven wrote:
> On 32-bit builds (e.g. m68k):
>
> ERROR: modpost: "__umoddi3" [fs/btrfs/btrfs.ko] undefined!
>
> "cur_in - start" is 64-bit, while sectorsize is u32.
>
> As sectorsize is always a power of two, the 64-by-32 modulo operation
> can be replaced by a much cheaper bitwise AND with "sectorsize - 1".
>
> Fixes: 0078783c7089fc83 ("btrfs: rework lzo_compress_pages() to make it subpage compatible")
> Reported-by: noreply@ellerman.id.au
> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Thanks. Folded to the patch as it's still in the devel queue.
prev parent reply other threads:[~2021-10-05 23:23 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-05 9:34 [PATCH -next] btrfs: lzo: Mask instead of divide to fix 32-bit build Geert Uytterhoeven
2021-10-05 9:41 ` Qu Wenruo
2021-10-05 23:23 ` David Sterba [this message]
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