interims VFS queue

[Christoph Hellwig <hch@infradead.org>]

As discussed at KS I've collected up the VFS patches from 3 month worth
of linux-fsdevel archives.

The major changes are lseek locking and O_DIRECT cache footprint
optimizations from Andi Kleen, which Al already had queued up in his
non-public queue before he caught the flu.  In addition to that
it's just fairly small patches.  If I missed anything important please
send it my way until Al is back.


There is a few promiment things intentionally missing:

 - ->d_prune support from Sage.  I though we finally had this one nailed
   down a few weeks ago, but it crashes btrfs when running xfstests, so
   we'll need another round.
 - Miklos' remount r/o fixes.  I really wanted them, but found a few
   minor issue and want to give them more QA first.  Hopefully we can
   get them in during a second pull for 3.2, even more hopefull Al will
   be back in time as he hasn't replied back to Miklos' answers to his
   comments.
 - the block queue caching part of Andis O_DIRECT patches.  With the
   current mess we have with the block queues I'd rather defer that
   part for now, hopefull we can still put it in later.
 - the btrfs lseek cleanups as part of the lseek series - I think they
   are correct, but I fear we might run into a merge mess with them
   as Chris said he picked them up for the btrfs tree a while ago.

The tree is at

  git://git.kernel.org/pub/scm/linux/kernel/git/hch/vfs-queue.git for-next

and I'd prefer if Stephen could add it to linux-next for a day or two
before pulling it into mainline.

The git request-pull information is below:



The following changes since commit c3b92c8787367a8bb53d57d9789b558f1295cc96:

  Linux 3.1 (2011-10-24 09:10:05 +0200)

are available in the git repository at:
  git://git.kernel.org/pub/scm/linux/kernel/git/hch/vfs-queue.git for-next

Andi Kleen (11):
      direct-io: separate fields only used in the submission path from struct dio
      direct-io: fix a wrong comment
      direct-io: rearrange fields in dio/dio_submit to avoid holes
      direct-io: use a slab cache for struct dio
      direct-io: separate map_bh from dio
      direct-io: inline the complete submission path
      direct-io: merge direct_io_walker into __blockdev_direct_IO
      vfs: do (nearly) lockless generic_file_llseek
      vfs: add generic_file_llseek_size
      ext4: replace cut'n'pasted llseek code with generic_file_llseek_size
      nfs: drop unnecessary locking in llseek

Andreas Gruenbacher (3):
      vfs: indicate that the permission functions take all the MAY_* flags
      vfs: pass all mask flags check_acl and posix_acl_permission
      vfs: add a comment to inode_permission()

Aneesh Kumar K.V (1):
      vfs: add hex format for MAY_* flag values

Bryan Schumaker (1):
      vfs: add "device" tag to /proc/self/mountstats

Christoph Hellwig (1):
      vfs: fix spinning prevention in prune_icache_sb

Eric W. Biederman (1):
      compat: sync compat_stats with statfs.

J. Bruce Fields (1):
      leases: fix write-open/read-lease race

Jeff Layton (1):
      vfs: iov_iter: have iov_iter_advance decrement nr_segs appropriately

Wang Sheng-Hui (1):
      cleanup: vfs: small comment fix for block_invalidatepage

 arch/mips/include/asm/compat.h    |    3 +-
 arch/parisc/include/asm/compat.h  |    3 +-
 arch/powerpc/include/asm/compat.h |    3 +-
 arch/s390/include/asm/compat.h    |    3 +-
 arch/sparc/include/asm/compat.h   |    3 +-
 arch/x86/include/asm/compat.h     |    3 +-
 fs/btrfs/file.c                   |    2 +-
 fs/buffer.c                       |    4 +-
 fs/cifs/cifsfs.c                  |    2 +-
 fs/compat.c                       |    7 +-
 fs/direct-io.c                    |  646 +++++++++++++++++++------------------
 fs/ext4/file.c                    |   47 +---
 fs/gfs2/file.c                    |    4 +-
 fs/inode.c                        |    2 +-
 fs/namei.c                        |   17 +-
 fs/namespace.c                    |    1 +
 fs/nfs/file.c                     |   10 +-
 fs/open.c                         |    4 +
 fs/posix_acl.c                    |    2 +
 fs/read_write.c                   |   74 +++--
 include/linux/fs.h                |   28 +-
 mm/filemap.c                      |    3 +
 22 files changed, 440 insertions(+), 431 deletions(-)