rcu: Simplify RCU_TINY RCU callback invocation
authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Wed, 27 Mar 2013 17:11:15 +0000 (10:11 -0700)
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Mon, 10 Jun 2013 20:45:51 +0000 (13:45 -0700)
TINY_PREEMPT_RCU could use a kthread to handle RCU callback invocation,
which required an API to abstract kthread vs. softirq invocation.
Now that TINY_PREEMPT_RCU is no longer with us, this commit retires
this API in favor of direct use of the relevant softirq primitives.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>

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