linux-kernel - [PATCH tip/core/rcu 87/88] rcu: Remove event tracing from Tiny RCU

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Date:   Thu, 25 May 2017 15:00:00 -0700
From:   "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:     linux-kernel@...r.kernel.org
Cc:     mingo@...nel.org, jiangshanlai@...il.com, dipankar@...ibm.com,
        akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
        josh@...htriplett.org, tglx@...utronix.de, peterz@...radead.org,
        rostedt@...dmis.org, dhowells@...hat.com, edumazet@...gle.com,
        fweisbec@...il.com, oleg@...hat.com, bobby.prani@...il.com,
        "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Subject: [PATCH tip/core/rcu 87/88] rcu: Remove event tracing from Tiny RCU

This commit saves a few lines by getting rid of Tiny RCU's event tracing.

Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
---
 kernel/rcu/tiny.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/kernel/rcu/tiny.c b/kernel/rcu/tiny.c
index 2306cab2195d..595cb1bf944f 100644
--- a/kernel/rcu/tiny.c
+++ b/kernel/rcu/tiny.c
@@ -35,7 +35,6 @@
 #include <linux/time.h>
 #include <linux/cpu.h>
 #include <linux/prefetch.h>
-#include <linux/trace_events.h>
 
 #include "rcu.h"
 
@@ -139,7 +138,6 @@ static void __rcu_process_callbacks(struct rcu_ctrlblk *rcp)
 		local_irq_restore(flags);
 		return;
 	}
-	RCU_TRACE(trace_rcu_batch_start(rcp->name, 0, rcp->qlen, -1);)
 	list = rcp->rcucblist;
 	rcp->rcucblist = *rcp->donetail;
 	*rcp->donetail = NULL;
@@ -161,10 +159,6 @@ static void __rcu_process_callbacks(struct rcu_ctrlblk *rcp)
 		RCU_TRACE(cb_count++;)
 	}
 	RCU_TRACE(rcu_trace_sub_qlen(rcp, cb_count);)
-	RCU_TRACE(trace_rcu_batch_end(rcp->name,
-				      cb_count, 0, need_resched(),
-				      is_idle_task(current),
-				      false));
 }
 
 static __latent_entropy void rcu_process_callbacks(struct softirq_action *unused)
-- 
2.5.2