dd6f843a9fca ("tasks: add put_task_struct_many()")
154abafc68bf ("tasks, sched/core: With a grace period after finish_task_switch(), remove unnecessary code")
3fbd7ee285b2 ("tasks: Add a count of task RCU users")
ec1d281923cf ("sched/core: Convert task_struct.usage to refcount_t")
828450791608 ("Merge branch 'linus' into sched/urgent, to resolve conflicts")