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rcu: avoid pointless blocked-task warnings
If the RCU callback-processing kthread has nothing to do, it parks in a wait_event(). If RCU remains idle for more than two minutes, the kernel complains about this. This commit changes from wait_event() to wait_event_interruptible() to prevent the kernel from complaining just because RCU is idle. Reported-by: Russell King <firstname.lastname@example.org> Signed-off-by: Paul E. McKenney <email@example.com> Signed-off-by: Paul E. McKenney <firstname.lastname@example.org> Tested-by: Thomas Weber <email@example.com> Tested-by: Russell King <firstname.lastname@example.org>
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