[PATCH tip/core/rcu 0/3] rcu: fix !PREEMPT, __mpol_dup(), andftrace_perf_buf_prepare() RCU lockdep splats

[Paul E. McKenney]

Hello!

This patch fixes three RCU lockdep issues:

1.	Makes rcu_read_lock_sched_held() correctly handle !PREEMPT
	kernels.

2.	Suppresses __mpol_dup() false positive.

3.	Converts a pair of rcu_dereference() calls in
	ftrace_perf_buf_prepare() to rcu_dereference_sched().

There are probably more where these came from.  ;-)

							Thanx, Paul

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

 include/linux/rcupdate.h           |   15 ++++++++++++++-
 include/trace/ftrace.h             |    4 ++--
 kernel/trace/trace_event_profile.c |    5 ++---
 mm/mempolicy.c                     |    3 ++-
 4 files changed, 20 insertions(+), 7 deletions(-)
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