[git pull] lazytime stuff

[Al Viro]

	Lazytime stuff from tytso.  Please, pull from
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git lazytime.

Shortlog:
Theodore Ts'o (3):
      vfs: add support for a lazytime mount option
      vfs: add find_inode_nowait() function
      ext4: add optimization for the lazytime mount option

Diffstat:
 fs/ext4/inode.c                  |  70 +++++++++++++++++++++++++-
 fs/ext4/super.c                  |  10 ++++
 fs/fs-writeback.c                |  62 +++++++++++++++++++----
 fs/gfs2/file.c                   |   4 +-
 fs/inode.c                       | 106 +++++++++++++++++++++++++++++++++------
 fs/jfs/file.c                    |   2 +-
 fs/libfs.c                       |   2 +-
 fs/proc_namespace.c              |   1 +
 fs/sync.c                        |   8 +++
 include/linux/backing-dev.h      |   1 +
 include/linux/fs.h               |  10 ++++
 include/trace/events/ext4.h      |  30 +++++++++++
 include/trace/events/writeback.h |  60 +++++++++++++++++++++-
 include/uapi/linux/fs.h          |   4 +-
 mm/backing-dev.c                 |  10 +++-
 15 files changed, 343 insertions(+), 37 deletions(-)
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