[RFC PATCH 0/6 paul/rcu/srcu] srcu: implement call_srcu()

[Lai Jiangshan]

Patch 1~4 are for preparing.
Patch 1,2 can be merge now, maybe patch 3 can be merge now.

Patch 5 is the draft per-cpu state machine call_srcu() implementation
	it will be split before merge.

Patch 6 is for srcu torture test.

Lai Jiangshan (6):
  remove unused srcu_barrier()
  Don't touch the snap in srcu_readers_active()
  use "int trycount" instead of "bool expedited"
  remove flip_idx_and_wait()
  implement call_srcu()
  add srcu torture test

 include/linux/srcu.h |   49 +++++-
 kernel/rcutorture.c  |   68 ++++++++-
 kernel/srcu.c        |  421 +++++++++++++++++++++++++++++++++++++++++---------
 3 files changed, 454 insertions(+), 84 deletions(-)

-- 
1.7.4.4

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