linux-kernel - [PATCH rcu 17/25] rcu: Remove expedited grace-period fast-path forward-progress helper

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Message-Id: <20220831181210.2695080-17-paulmck@kernel.org>
Date:   Wed, 31 Aug 2022 11:12:02 -0700
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     rcu@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, kernel-team@...com,
        rostedt@...dmis.org, "Paul E. McKenney" <paulmck@...nel.org>
Subject: [PATCH rcu 17/25] rcu: Remove expedited grace-period fast-path forward-progress helper

Now that the expedited grace-period fast path can only happen during
the pre-scheduler portion of early boot, this fast path can no longer
block run-time RCU Trace grace periods.  This commit therefore removes
the conditional cond_resched() invocation.

Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
---
 kernel/rcu/tree_exp.h | 2 --
 1 file changed, 2 deletions(-)

diff --git a/kernel/rcu/tree_exp.h b/kernel/rcu/tree_exp.h
index 9c0ae834ef076..1a51f9301ebff 100644
--- a/kernel/rcu/tree_exp.h
+++ b/kernel/rcu/tree_exp.h
@@ -924,8 +924,6 @@ void synchronize_rcu_expedited(void)
 		// them, which allows reuse of ->gp_seq_polled_exp_snap.
 		rcu_poll_gp_seq_start_unlocked(&rcu_state.gp_seq_polled_exp_snap);
 		rcu_poll_gp_seq_end_unlocked(&rcu_state.gp_seq_polled_exp_snap);
-		if (rcu_init_invoked())
-			cond_resched();
 		return;  // Context allows vacuous grace periods.
 	}
 
-- 
2.31.1.189.g2e36527f23