rcu: update documentation/comments for Lai's adoption patch
authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Wed, 20 Oct 2010 19:06:18 +0000 (12:06 -0700)
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Tue, 30 Nov 2010 06:01:59 +0000 (22:01 -0800)
Lai's RCU-callback immediate-adoption patch changes the RCU tracing
output, so update tracing.txt.  Also update a few comments to clarify
the synchronization design.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

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