linux-kernel - [PATCH 2/4] rcu: Irq nesting is always 0 on rcu_enter_idle

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Message-Id: <1322515487-18690-3-git-send-email-fweisbec@gmail.com>
Date:	Mon, 28 Nov 2011 22:24:45 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Josh Triplett <josh@...htriplett.org>
Subject: [PATCH 2/4] rcu: Irq nesting is always 0 on rcu_enter_idle_common

So pass 0 directly as a nesting value on the tracing calls.

Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
Cc: Josh Triplett <josh@...htriplett.org>
---
 kernel/rcutree.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index c2aaadf..b80cb41 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -350,11 +350,10 @@ static int rcu_implicit_offline_qs(struct rcu_data *rdp)
  */
 static void rcu_idle_enter_common(struct rcu_dynticks *rdtp)
 {
-	trace_rcu_dyntick("Start", rdtp->dynticks_nesting);
+	trace_rcu_dyntick("Start", 0);
 	if (!idle_cpu(smp_processor_id())) {
 		WARN_ON_ONCE(1);	/* must be idle task! */
-		trace_rcu_dyntick("Error on entry: not idle task",
-				   rdtp->dynticks_nesting);
+		trace_rcu_dyntick("Error on entry: not idle task", 0);
 		ftrace_dump(DUMP_ALL);
 	}
 	/* CPUs seeing atomic_inc() must see prior RCU read-side crit sects */
-- 
1.7.5.4

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