[PATCH 0/4] lockdep cmp fn conversions

Kent Overstreet
2024-01-27T02:08:41Z

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(-)

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2.43.0