rcu: Stop disabling expedited RCU CPU stall warnings (908d2c1f) · Commits · 戴 / test

Now that RCU expedited grace periods are always driven by a workqueue, there is no need to account for signal reception, and thus no need to disable expedited RCU CPU stall warnings due to signal reception. This commit therefore removes the signal-reception checks, leaving a WARN_ON() to catch possible future bugs. Signed-off-by:

Paul E. McKenney <paulmck@linux.vnet.ibm.com>

kernel/rcu/tree_exp.h

+1 −6

Original line number	Diff line number	Diff line
		@@ -427,12 +427,7 @@ static void synchronize_sched_expedited_wait(struct rcu_state *rsp)
		jiffies_stall);
		if (ret > 0 \|\| sync_rcu_preempt_exp_done(rnp_root))
		return;
		if (ret < 0) {
		/* Hit a signal, disable CPU stall warnings. */
		swait_event(rsp->expedited_wq,
		sync_rcu_preempt_exp_done(rnp_root));
		return;
		}
		WARN_ON(ret < 0); /* workqueues should not be signaled. */
		pr_err("INFO: %s detected expedited stalls on CPUs/tasks: {",
		rsp->name);
		ndetected = 0;

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