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Paul E. McKenney 0c7d10e4b9 documentation: Emphasize the call_rcu() is illegal from idle 
Although call_rcu()'s fastpath works just fine on an idle CPU,
some branches of the slowpath invoke the scheduler, which uses
RCU.  Therefore, this commit emphasizes the fact that call_rcu()
must not be invoked from an idle CPU.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2016-03-31 13:33:23 -07:00
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Requirements.html documentation: Emphasize the call_rcu() is illegal from idle 2016-03-31 13:33:23 -07:00