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rcu: Remove cond_resched() from Tiny synchronize_sched()

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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: 8b355e3bc1 ("rcu: Drive expedited grace periods from workqueue")
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: <stable@vger.kernel.org> # 4.9.0-
This commit is contained in:
Paul E. McKenney 2017-01-09 23:23:15 -08:00
parent a121103c92
commit f466ae66fa
1 changed files with 0 additions and 4 deletions
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4
kernel/rcu/tiny.c
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@ -185,9 +185,6 @@ static __latent_entropy void rcu_process_callbacks(struct softirq_action *unused
* benefits of doing might_sleep() to reduce latency.) * benefits of doing might_sleep() to reduce latency.)
* *
* Cool, huh? (Due to Josh Triplett.) * 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) void synchronize_sched(void)
{ {
@ -195,7 +192,6 @@ void synchronize_sched(void)
lock_is_held(&rcu_lock_map) || lock_is_held(&rcu_lock_map) ||
lock_is_held(&rcu_sched_lock_map), lock_is_held(&rcu_sched_lock_map),
"Illegal synchronize_sched() in RCU read-side critical section"); "Illegal synchronize_sched() in RCU read-side critical section");
cond_resched();
} }
EXPORT_SYMBOL_GPL(synchronize_sched); EXPORT_SYMBOL_GPL(synchronize_sched);