rcutorture: Add missing destroy_timer_on_stack()
The rcu_torture_reader() function uses an on-stack timer_list structure which it initializes with setup_timer_on_stack(). However, it fails to use destroy_timer_on_stack() before exiting, which results in leaking a tracking object if DEBUG_OBJECTS is enabled. This commit therefore invokes destroy_timer_on_stack() to avoid this leakage. Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Reviewed-by: NJosh Triplett <josh@joshtriplett.org> Signed-off-by: NPaul E. McKenney <paulmck@linux.vnet.ibm.com>
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