tree 6f24fbb13e1c30ff3e7d928841e0713250a96cf1
parent 5df829bc8f01008d4160be3968fc2308280913c3
author Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1459447208 -0700
committer Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1459447208 -0700

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>