[PATCH tip/core/rcu 0/15] Miscellaneous fixes for 3.18

[Paul E. McKenney]

Hello!

This series contains miscellaneous fixes for RCU:

1.	Remove more read-modify-write ACCESS_ONCE() calls, courtesy of
	Pranith Kumar.

2.	Fix sparse warning for rcu_batches_completed_preempt(), courtesy
	of Pranith Kumar.

3.	Use bool type for variable holding rcu_is_watching() return
	value, courtesy of Pranith Kumar.

4.	Use bool constant for bool return in rcu_try_advance_all_cbs(),
	courtesy of Pranith Kumar.

5.	Use bool constant for bool return in rcu_lockdep_current_cpu_online(),
	courtesy of Pranith Kumar.

6.	Use bool constant for assignments to bool variable isidle,
	courtesy of Pranith Kumar.

7.	Shrink the kernel a bit by uninlining rcu_read_lock_held(),
	courtesy of Oleg Nesterov.

8.	Shrink the kernel a bit more by defining tracepoint strings only
	if CONFIG_TRACING is set, courtesy of Ard Biesheuvel.

9.	Fix outdated pathnames in comments, courtesy of Pranith Kumar.

10.	Remove stale comment, courtesy of Pranith Kumar.

11.	Break additional call_rcu() deadlock involving scheduler and perf.

12.	Shrink the TINY_RCU side of the kernel by putting error checks
	under #ifdef.

13.	Eliminate unnecessary self-wakeups, courtesy of Pranith Kumar.

14.	Replace flush_signals() with WARN_ON(signal_pending()).

15.	Add ACCESS_ONCE() for RCU_INIT_POINTER().

							Thanx, Paul

------------------------------------------------------------------------

 b/include/linux/rcupdate.h   |   40 ++-------------------------------------
 b/include/trace/events/rcu.h |    3 ++
 b/kernel/rcu/tiny.c          |    8 +++----
 b/kernel/rcu/tree.c          |   39 +++++++++++++++++++++++---------------
 b/kernel/rcu/tree.h          |    9 ++++++--
 b/kernel/rcu/tree_plugin.h   |   44 +++++++++++++++++++++++++++----------------
 b/kernel/rcu/update.c        |   32 +++++++++++++++++++++++++++++++
 7 files changed, 101 insertions(+), 74 deletions(-)

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