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Merge tag 'locks-v3.17-2' of git://git.samba.org/jlayton/linux

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Pull file locking bugfixes from Jeff Layton:
 "Most of these patches are to fix a long-standing regression that crept
  in when the BKL was removed from the file-locking code.  The code was
  converted to use a conventional spinlock, but some fl_release_private
  ops can block and you can end up sleeping inside the lock.

  There's also a patch to make /proc/locks show delegations as 'DELEG'"

* tag 'locks-v3.17-2' of git://git.samba.org/jlayton/linux:
  locks: update Locking documentation to clarify fl_release_private behavior
  locks: move locks_free_lock calls in do_fcntl_add_lease outside spinlock
  locks: defer freeing locks in locks_delete_lock until after i_lock has been dropped
  locks: don't reuse file_lock in __posix_lock_file
  locks: don't call locks_release_private from locks_copy_lock
  locks: show delegations as "DELEG" in /proc/locks
This commit is contained in:
Linus Torvalds
2014-08-16 08:58:47 -06:00
parent da06df548e 2ece173e47
commit 53b95d6341
2 changed files with 62 additions and 30 deletions
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6
Documentation/filesystems/Locking
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@@ -349,7 +349,11 @@ prototypes:
locking rules:
inode->i_lock may block
fl_copy_lock: yes no
fl_release_private: maybe no
fl_release_private: maybe maybe[1]
[1]: ->fl_release_private for flock or POSIX locks is currently allowed
to block. Leases however can still be freed while the i_lock is held and
so fl_release_private called on a lease should not block.
----------------------- lock_manager_operations ---------------------------
prototypes: