[0/4] lockdep cmp fn conversions

Message

Kent Overstreet Jan. 27, 2024, 2:08 a.m. UTC

rationale:
*_lock_nested() is fundamentally broken - in order for lockdep to work
we need to be able to check that we're following some defined ordering,
and it's not possible to define a total ordering of an arbitrary number
of objects with only a small fixed size enum.

so it needs to go. awhile back I added the ability to set a comparison
function for a lock class, and this is the start of hopefully a slow
steady trickle of patches as time allows to convert code to use it.

Kent Overstreet (4):
  fs/pipe: Convert to lockdep_cmp_fn
  pktcdvd: kill mutex_lock_nested() usage
  net: Convert sk->sk_peer_lock to lock_set_cmp_fn_ptr_order()
  af_unix: convert to lock_cmp_fn

 drivers/block/pktcdvd.c  |  8 ++---
 fs/pipe.c                | 77 ++++++++++++++++------------------------
 include/linux/lockdep.h  |  3 ++
 include/net/af_unix.h    |  3 --
 kernel/locking/lockdep.c |  6 ++++
 net/core/sock.c          |  1 +
 net/unix/af_unix.c       | 24 ++++++-------
 net/unix/diag.c          |  2 +-
 8 files changed, 55 insertions(+), 69 deletions(-)