Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Pull vfs dcache livelock fix from Al Viro:
 "Fixes for livelocks in shrink_dentry_list() introduced by fixes to
  shrink list corruption; the root cause was that trylock of parent's
  ->d_lock could be disrupted by d_walk() happening on other CPUs,
  resulting in shrink_dentry_list() making no progress *and* the same
  d_walk() being called again and again for as long as
  shrink_dentry_list() doesn't get past that mess.

  The solution is to have shrink_dentry_list() treat that trylock
  failure not as 'try to do the same thing again', but 'lock them in the
  right order'"

* 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  dentry_kill() doesn't need the second argument now
  dealing with the rest of shrink_dentry_list() livelock
  shrink_dentry_list(): take parent's ->d_lock earlier
  expand dentry_kill(dentry, 0) in shrink_dentry_list()
  split dentry_kill()
  lift the "already marked killed" case into shrink_dentry_list()

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