Re: [GIT PULL] Btrfs

[Heiko Carstens]

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.