From: David Sterba <dsterba@suse.cz>
To: Adam Borowski <kilobyte@angband.pl>
Cc: Nick Terrell <terrelln@fb.com>,
kernel-team@fb.com, Chris Mason <clm@fb.com>,
Yann Collet <cyan@fb.com>,
squashfs-devel@lists.sourceforge.net,
linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 3/4] btrfs: Add zstd support
Date: Mon, 26 Jun 2017 14:12:30 +0200 [thread overview]
Message-ID: <20170626121230.GF2866@twin.jikos.cz> (raw)
In-Reply-To: <20170625213022.7kaa7agzmzdyw3n4@angband.pl>
On Sun, Jun 25, 2017 at 11:30:22PM +0200, Adam Borowski wrote:
> On Mon, Jun 26, 2017 at 03:03:17AM +0800, kbuild test robot wrote:
> > Hi Nick,
> >
> > url: https://github.com/0day-ci/linux/commits/Nick-Terrell/lib-Add-xxhash-module/20170625-214344
> > config: i386-allmodconfig (attached as .config)
> > compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
> > reproduce:
> > # save the attached .config to linux build tree
> > make ARCH=i386
> >
> > All errors (new ones prefixed by >>):
> >
> > >> ERROR: "__udivdi3" [lib/zstd/zstd_compress.ko] undefined!
> > ERROR: "__udivdi3" [fs/ufs/ufs.ko] undefined!
>
> Just to save you time to figure it out:
> for division when one or both arguments are longer than the architecture's
> word, gcc uses helper functions that are included when compiling in a hosted
> environment -- but not in freestanding.
>
> Thus, you want do_div() instead of /; do check widths and signedness of
> arguments.
No do_div please, div_u64 or div64_u64.
next prev parent reply other threads:[~2017-06-26 12:29 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-22 22:01 [PATCH 1/4] lib: Add xxhash module Nick Terrell
2017-06-22 22:01 ` [PATCH 2/4] lib: Add zstd modules Nick Terrell
2017-06-22 22:01 ` [PATCH 3/4] btrfs: Add zstd support Nick Terrell
2017-06-25 15:02 ` kbuild test robot
2017-06-25 19:03 ` kbuild test robot
2017-06-25 21:30 ` Adam Borowski
2017-06-26 12:12 ` David Sterba [this message]
2017-06-26 16:54 ` Nick Terrell
2017-06-27 4:18 ` [PATCH] lib/zstd: use div_u64() to let it build on 32-bit Adam Borowski
2017-06-27 5:27 ` Nick Terrell
2017-06-27 12:57 ` David Sterba
2017-06-28 5:29 ` Nick Terrell
2017-06-29 1:02 ` Adam Borowski
2017-06-29 3:01 ` [PATCH] btrfs: Keep one more workspace around Nick Terrell
2017-06-29 13:59 ` David Sterba
2017-06-22 22:01 ` [PATCH 4/4] squashfs: Add zstd support Nick Terrell
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