Merge branch 'work.openat2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro...

Pull in Al's openat2 branch, since we'll need that for the openat2
support.

* 'work.openat2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  Documentation: path-lookup: include new LOOKUP flags
  selftests: add openat2(2) selftests
  open: introduce openat2(2) syscall
  namei: LOOKUP_{IN_ROOT,BENEATH}: permit limited ".." resolution
  namei: LOOKUP_IN_ROOT: chroot-like scoped resolution
  namei: LOOKUP_BENEATH: O_BENEATH-like scoped resolution
  namei: LOOKUP_NO_XDEV: block mountpoint crossing
  namei: LOOKUP_NO_MAGICLINKS: block magic-link resolution
  namei: LOOKUP_NO_SYMLINKS: block symlink resolution
  namei: allow set_root() to produce errors
  namei: allow nd_jump_link() to produce errors
  nsfs: clean-up ns_get_path() signature to return int
  namei: only return -ECHILD from follow_dotdot_rcu()

diff --cc MAINTAINERS
Simple merge

diff --cc arch/arm64/include/asm/unistd.h
Simple merge

diff --cc fs/namei.c
Simple merge

diff --cc fs/nsfs.c
Simple merge

diff --cc include/linux/namei.h
Simple merge

diff --cc include/linux/syscalls.h
Simple merge

diff --cc kernel/events/core.c
Simple merge

diff --cc security/apparmor/apparmorfs.c
Simple merge