Commit-ID: b5eaeaa509d30812049f9e1c05446d564e91616b Gitweb: http://git.kernel.org/tip/b5eaeaa509d30812049f9e1c05446d564e91616b Author: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx> AuthorDate: Fri, 10 Feb 2017 14:50:46 -0800 Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx> CommitDate: Tue, 18 Apr 2017 11:38:18 -0700 srcu: Allow early boot use of synchronize_srcu() This commit checks for pre-scheduler state, and if that early in the boot process, synchronize_srcu() and friends are no-ops. Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx> --- kernel/rcu/srcu.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/rcu/srcu.c b/kernel/rcu/srcu.c index e6da9fc..7e7ecaa 100644 --- a/kernel/rcu/srcu.c +++ b/kernel/rcu/srcu.c @@ -417,6 +417,8 @@ static void __synchronize_srcu(struct srcu_struct *sp, int trycount) lock_is_held(&rcu_sched_lock_map), "Illegal synchronize_srcu() in same-type SRCU (or in RCU) read-side critical section"); + if (rcu_scheduler_active == RCU_SCHEDULER_INACTIVE) + return; might_sleep(); init_completion(&rcu.completion); -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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