linux_mutex_init
linux_mutex_init(_m, mutex_name(#_m), SX_NOWITNESS)
linux_mutex_init(_m, _n, SX_NOWITNESS)
linux_mutex_init(_m, mutex_name(#_m), SX_DUPOK)
linux_mutex_init(&lock->base, ww_class->mutex_name, SX_NOWITNESS);