The first item list_for_each_entry_continue(alist) iterates over is
alist->next, rather than alist itself. Consequently,
rcu_print_detail_task_stall_rnp() skips the task referenced by gp_tasks.

Use gp_tasks->prev as the argument to list_for_each_entry_continue()
instead.
Signed-off-by: NPatrick Daly <pdaly@codeaurora.org>
Signed-off-by: NPaul E. McKenney <paulmck@linux.vnet.ibm.com>