[git pull] vfs_mkobj() and mqueue-related stuff

[Al Viro]

	mqueue and bpf go through rather painful and similar contortions to
create objects in their dentry trees.  Provide a primitive for doing that
without abusing ->mknod(), switch bpf and mqueue to it.
	Another mqueue-related thing that has ended up in that branch is
on-demand creation of internal mount (based upon the work of Giuseppe Scrivano).

The following changes since commit ae64f9bd1d3621b5e60d7363bc20afb46aede215:

  Linux 4.15-rc2 (2017-12-03 11:01:47 -0500)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git work.mqueue

for you to fetch changes up to 36735a6a2b5e042db1af956ce4bcc13f3ff99e21:

  mqueue: switch to on-demand creation of internal mount (2018-01-05 11:54:37 -0500)

----------------------------------------------------------------
Al Viro (9):
      new primitive: vfs_mkobj()
      bpf_obj_do_pin(): switch to vfs_mkobj(), quit abusing ->mknod()
      mqueue: switch to vfs_mkobj(), quit abusing ->d_fsdata
      move dentry_open() calls up into do_mq_open()
      mqueue: fold mq_attr_ok() into mqueue_get_inode()
      do_mq_open(): move all work prior to dentry_open() into a helper
      mqueue: clean prepare_open() up
      tidy do_mq_open() up a bit
      mqueue: switch to on-demand creation of internal mount

 fs/namei.c         |  21 +++++
 include/linux/fs.h |   4 +
 ipc/mqueue.c       | 241 ++++++++++++++++++++++++-----------------------------
 kernel/bpf/inode.c |  50 +++++------
 4 files changed, 158 insertions(+), 158 deletions(-)