CONFIG_LOCKDEP_COMPLETIONS (not configurable)

configname: CONFIG_LOCKDEP_COMPLETIONS

Linux Kernel Configuration
└─>Lock Debugging (spinlocks, mutexes, etc...)
└─>LOCKDEP_COMPLETIONS
In linux kernel since version 4.9.1 (release Date: 2017-01-06)  
A deadlock caused by wait_for_completion() and complete() can be
detected by lockdep using crossrelease feature.

is depended by
CONFIG_PROVE_LOCKING