[git pull] vfs.git namespace stuff

[Al Viro]

	Rik's patches reducing the amount of synchronize_rcu() triggered
by ipc namespace destruction.  I've some pending stuff reducing that on
the normal umount side, but it's nowhere near ready and Rik's stuff shouldn't
be held back due to conflicts - I'll just redo the parts of my series that
stray into ipc/*.

The following changes since commit b7bfaa761d760e72a969d116517eaa12e404c262:

  Linux 6.2-rc3 (2023-01-08 11:49:43 -0600)

are available in the Git repository at:

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

for you to fetch changes up to da27f796a832122ee533c7685438dad1c4e338dd:

  ipc,namespace: batch free ipc_namespace structures (2023-01-27 19:08:00 -0500)

----------------------------------------------------------------
Rik van Riel (2):
      ipc,namespace: make ipc namespace allocation wait for pending free
      ipc,namespace: batch free ipc_namespace structures

 fs/namespace.c        | 18 ++++++++++++++----
 include/linux/mount.h |  1 +
 ipc/mqueue.c          |  5 -----
 ipc/namespace.c       | 35 ++++++++++++++++++++++++++---------
 ipc/util.h            |  2 --
 5 files changed, 41 insertions(+), 20 deletions(-)