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To: Heiko Carstens <heiko.carstens@de.ibm.com>
From: Chris Mason <chris.mason@fusionio.com>
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CC: Linus Torvalds <torvalds@linux-foundation.org>,
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        Dulshani Gunawardhana <dulshani.gunawardhana89@gmail.com>,
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        Mark Brown <broonie@kernel.org>
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Message-ID: <20131115134019.3802.51473@localhost.localdomain>
Subject: Re: [GIT PULL] Btrfs
Date: Fri, 15 Nov 2013 08:40:19 -0500
Sender: linux-btrfs-owner@vger.kernel.org
List-ID: <linux-btrfs.vger.kernel.org>

Quoting Chris Mason (2013-11-15 07:21:31)
> Quoting Heiko Carstens (2013-11-15 06:32:16)
> > On Thu, Nov 14, 2013 at 12:19:52PM -0500, Chris Mason wrote:
> > > Hi Linus,
> > > 
> > > Please pull my for-linus branch:
> > > 
> > > git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs.git for-linus
> > > 
> > > This is our usual merge window set of bug fixes, performance
> > > improvements and cleanups.  Miao Xie has some really nice optimizations
> > > for writeback.
> > > 
> > > Josef also expanded our sanity checks quite a bit; these make up a big
> > > chunk of the new lines.
> > 
> > Hmm..  b19e68439375  "btrfs: Remove redundant local zero structure" seems to
> > use the empty_zero_page incorrectly and causes this compile warning on s390:
> > 
> >   CC      fs/btrfs/ioctl.o
> > fs/btrfs/ioctl.c: In function 'btrfs_is_empty_uuid':
> > fs/btrfs/ioctl.c:372:2: warning: passing argument 2 of 'memcmp' makes pointer from
> >                         integer without a cast [enabled by default]
> >   return !memcmp(uuid, empty_zero_page, BTRFS_UUID_SIZE);
> >   ^
> > 
> > In fact there seem to be two more incorrect usages in the kernel. The patch
> > below is not really tested.
> 
> Thanks Heiko,
> 
> I'll make a new pull with the btrfs part of this.

Or something slightly different ;)

BUG: unable to handle kernel paging request at 0000000001ba6000
IP: [<ffffffff812b3656>] memcmp+0xf/0x22

-chris