[git pull] vfs fixes

[Al Viro]

-stable fodder; assorted deadlock fixes.  Please, pull from
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git for-linus

Shortlog:
Al Viro (3):
      Don't bother with redoing rw_verify_area() from default_file_splice_from()
      Nest rename_lock inside vfsmount_lock
      vt: synchronize_rcu() under spinlock is not nice...

Diffstat:
 drivers/tty/vt/vc_screen.c |    6 ++++--
 fs/dcache.c                |   16 +++++++++++-----
 fs/internal.h              |    5 +++++
 fs/read_write.c            |   25 +++++++++++++++++++++++++
 fs/splice.c                |    4 +++-
 5 files changed, 48 insertions(+), 8 deletions(-)

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