This commit applies a few updates based on a quick review of the RCU
documentations.
Signed-off-by: NPaul E. McKenney <paulmck@linux.vnet.ibm.com>

The advent of call_srcu() and srcu_barrier() obsoleted some of the
documentation, so this commit brings that up to date.
Signed-off-by: NPaul E. McKenney <paulmck@linux.vnet.ibm.com>

This patch updates the rcutorture documentation to include
updated output format.  It also brings the RCU documentation up
to date.
Signed-off-by: NPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: akpm@linux-foundation.org
Cc: torvalds@linux-foundation.org
Cc: davem@davemloft.net
Cc: dada1@cosmosbay.com
Cc: zbr@ioremap.net
Cc: jeff.chua.linux@gmail.com
Cc: paulus@samba.org
Cc: laijs@cn.fujitsu.com
Cc: jengelh@medozas.de
Cc: r000n@r000n.net
Cc: benh@kernel.crashing.org
Cc: mathieu.desnoyers@polymtl.ca
LKML-Reference: <12459460983193-git-send-email->
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Signed-off-by: NPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: NLai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>