linux-kernel - [PATCH] rcu: Have rcu torture test select trace

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Date:	Mon, 04 Feb 2013 10:52:21 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	"Paul E. McKenney" <paulmck@...ibm.com>,
	Ingo Molnar <mingo@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
Subject: [PATCH] rcu: Have rcu torture test select trace_clock

The rcu torture test uses trace_clock, and requires that it be built
into the kernel. If it is not, then we get the following build error:

ERROR: "trace_clock_local" [kernel/rcutorture.ko] undefined!

Reported-by: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
Signed-off-by: Steven Rostedt <rostedt@...dmis.org>

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 4057127..b542477 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -942,6 +942,7 @@ config SPARSE_RCU_POINTER
 config RCU_TORTURE_TEST
 	tristate "torture tests for RCU"
 	depends on DEBUG_KERNEL
+	select TRACE_CLOCK
 	default n
 	help
 	  This option provides a kernel module that runs torture tests


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