From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Wed, 3 Aug 2022 18:43:12 +0000 (-0700)
Subject: Merge tag 'pull-work.dcache' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
X-Git-Tag: v6.6.17~6927
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=200e340f2196d7fd427a5810d06e893b932f145a;p=platform%2Fkernel%2Flinux-rpi.git

Merge tag 'pull-work.dcache' of git://git./linux/kernel/git/viro/vfs

Pull vfs dcache updates from Al Viro:
 "The main part here is making parallel lookups safe for RT - making
  sure preemption is disabled in start_dir_add()/ end_dir_add() sections
  (on non-RT it's automatic, on RT it needs to to be done explicitly)
  and moving wakeups from __d_lookup_done() inside of such to the end of
  those sections.

  Wakeups can be safely delayed for as long as ->d_lock on in-lookup
  dentry is held; proving that has caught a bug in d_add_ci() that
  allows memory corruption when sufficiently bogus ntfs (or
  case-insensitive xfs) image is mounted. Easily fixed, fortunately"

* tag 'pull-work.dcache' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  fs/dcache: Move wakeup out of i_seq_dir write held region.
  fs/dcache: Move the wakeup from __d_lookup_done() to the caller.
  fs/dcache: Disable preemption on i_dir_seq write side on PREEMPT_RT
  d_add_ci(): make sure we don't miss d_lookup_done()
---

200e340f2196d7fd427a5810d06e893b932f145a