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Commit f466ae66 authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

rcu: Remove cond_resched() from Tiny synchronize_sched() 



It is now legal to invoke synchronize_sched() at early boot, which causes
Tiny RCU's synchronize_sched() to emit spurious splats.  This commit
therefore removes the cond_resched() from Tiny RCU's synchronize_sched().

Fixes: 8b355e3b ("rcu: Drive expedited grace periods from workqueue")
Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: <stable@vger.kernel.org> # 4.9.0-
parent a121103c

kernel/rcu/tiny.c

+0 −4
Original line number Diff line number Diff line
@@ -185,9 +185,6 @@ static __latent_entropy void rcu_process_callbacks(struct softirq_action *unused 
 * benefits of doing might_sleep() to reduce latency.)

 *

 * Cool, huh?  (Due to Josh Triplett.)

 *

 * But we want to make this a static inline later.  The cond_resched()

 * currently makes this problematic.

 */

void synchronize_sched(void)

{
@@ -195,7 +192,6 @@ void synchronize_sched(void) 
			 lock_is_held(&rcu_lock_map) ||

			 lock_is_held(&rcu_sched_lock_map),

			 "Illegal synchronize_sched() in RCU read-side critical section");

	cond_resched();

}

EXPORT_SYMBOL_GPL(synchronize_sched);