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8d6dd656a1
This commit adds a test for a three-level srcu_node tree for Tree SRCU in the existing SRCU-P scenario. This requires enabling CONFIG_RCU_EXPERT, so the CONFIG_RCU_EXPERT=n scenario is now SRCU-N. The reason for using SRCU-P for the tall tree is that preemption raises the possibility of locating more bugs than does the non-preemptive SRCU-N. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>