Eric W. Biederman 154abafc68 tasks, sched/core: With a grace period after finish_task_switch(), remove unnecessary code ... Remove work arounds that were written before there was a grace period after tasks left the runqueue in finish_task_switch(). In particular now that there tasks exiting the runqueue exprience a RCU grace period none of the work performed by task_rcu_dereference() excpet the rcu_dereference() is necessary so replace task_rcu_dereference() with rcu_dereference(). Remove the code in rcuwait_wait_event() that checks to ensure the current task has not exited. It is no longer necessary as it is guaranteed that any running task will experience a RCU grace period after it leaves the run queueue. Remove the comment in rcuwait_wake_up() as it is no longer relevant. Ref: 8f95c90ceb ("sched/wait, RCU: Introduce rcuwait machinery") Ref: 150593bf86 ("sched/api: Introduce task_rcu_dereference() and try_get_task_struct()") Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Chris Metcalf <cmetcalf@ezchip.com> Cc: Christoph Lameter <cl@linux.com> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: Kirill Tkhai <tkhai@yandex.ru> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Paul E. McKenney <paulmck@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Russell King - ARM Linux admin <linux@armlinux.org.uk> Cc: Thomas Gleixner <tglx@linutronix.de> Link: https://lkml.kernel.org/r/87lfurdpk9.fsf_-_@x220.int.ebiederm.org Signed-off-by: Ingo Molnar <mingo@kernel.org>		2019-09-25 17:42:29 +02:00
..
autogroup.h
clock.h
coredump.h
cpufreq.h
cputime.h
deadline.h	cpusets: Rebuild root domain deadline accounting information	2019-07-25 15:55:01 +02:00
debug.h
hotplug.h
idle.h
init.h
isolation.h	KVM: LAPIC: Inject timer interrupt via posted interrupt	2019-07-20 09:00:40 +02:00
jobctl.h	cgroup: cgroup v2 freezer	2019-04-19 11:26:48 -07:00
loadavg.h
mm.h	coredump: fix race condition between collapse_huge_page() and core dumping	2019-06-13 17:34:56 -10:00
nohz.h	sched/fair: Remove the rq->cpu_load[] update code	2019-06-03 11:49:38 +02:00
numa_balancing.h	sched/fair: Don't free p->numa_faults with concurrent readers	2019-07-25 15:37:04 +02:00
prio.h
rt.h
signal.h	signal: simplify set_user_sigmask/restore_user_sigmask	2019-07-16 19:23:24 -07:00
smt.h
stat.h
sysctl.h	sched/uclamp: Add system default clamps	2019-06-24 19:23:45 +02:00
task_stack.h
task.h	tasks, sched/core: With a grace period after finish_task_switch(), remove unnecessary code	2019-09-25 17:42:29 +02:00
topology.h	sched/topology: Add partition_sched_domains_locked()	2019-07-25 15:51:57 +02:00
user.h	keys: Move the user and user-session keyrings to the user_namespace	2019-06-26 21:02:32 +01:00
wake_q.h	locking/rwsem: Always release wait_lock before waking up tasks	2019-06-17 12:28:00 +02:00
xacct.h