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rcu: Make rcu_blocking_is_gp() stop early-boot might_sleep()
Currently, rcu_blocking_is_gp() invokes might_sleep() even during early boot when interrupts are disabled and before the scheduler is scheduling. This is at best an accident waiting to happen. Therefore, this commit moves that might_sleep() under an rcu_scheduler_active check in order to ensure that might_sleep() is not invoked unless sleeping might actually happen. Signed-off-by: Zqiang <qiang1.zhang@intel.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
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@ -3333,9 +3333,10 @@ void __init kfree_rcu_scheduler_running(void)
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*/
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static int rcu_blocking_is_gp(void)
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{
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if (rcu_scheduler_active != RCU_SCHEDULER_INACTIVE)
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if (rcu_scheduler_active != RCU_SCHEDULER_INACTIVE) {
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might_sleep();
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return false;
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might_sleep(); /* Check for RCU read-side critical section. */
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}
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return true;
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}
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