The fs/dlm code has a harmless but unannotated inversion between
connection and socket locking that triggers during shutdown and disables
lockdep. We don't want it to mask our warnings during testing that may
happen after the first shared unmount so we disable lockdep around the
dlm shutdown. It's not ideal but then neither are distro kernels that
ship with lockdep warnings.
Signed-off-by: Zach Brown <zab@versity.com>