From: Paul E. McKenney <paulmck@kernel.org>
Date: Fri, 5 Aug 2022 00:34:30 +0000 (-0700)
Subject: rcu: Remove expedited grace-period fast-path forward-progress helper
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=e8755d2bde7c296026fe5d47f1b75c7b19ba46fd;p=linux.git

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@kernel.org>
---

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.
 	}