[GIT PULL] overlayfs update for 4.7

[Miklos Szeredi]

Hi Linus,

Please pull from:

  git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs.git overlayfs-linus

The meat of this is a change to use the mounter's credentials for operations
that require elevated privileges (such as whiteout creation).  This fixes
behavior under user namespaces as well as being a nice cleanup.

Thanks,
Miklos

---
Antonio Murdaca (1):
      ovl: override creds with the ones from the superblock mounter

Miklos Szeredi (1):
      ovl: update documentation

Vivek Goyal (1):
      ovl: Do d_type check only if work dir creation was successful

---
 Documentation/filesystems/overlayfs.txt |  9 -----
 fs/overlayfs/copy_up.c                  | 26 +------------
 fs/overlayfs/dir.c                      | 67 +++------------------------------
 fs/overlayfs/overlayfs.h                |  1 +
 fs/overlayfs/readdir.c                  | 14 ++-----
 fs/overlayfs/super.c                    | 37 +++++++++++++-----
 6 files changed, 38 insertions(+), 116 deletions(-)