linux-kernel - Re: linux-next: Tree for Jan 7 (rcutorture)

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Date:	Mon, 7 Jan 2013 19:53:48 -0800
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Stephen Rothwell <sfr@...b.auug.org.au>,
	Randy Dunlap <rdunlap@...radead.org>,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: linux-next: Tree for Jan 7 (rcutorture)

On Mon, Jan 07, 2013 at 07:36:19PM -0500, Steven Rostedt wrote:
> On Mon, 2013-01-07 at 18:12 -0500, Steven Rostedt wrote:
> > On Tue, 2013-01-08 at 09:59 +1100, Stephen Rothwell wrote:
> > > Hi Paul,
> > > 
> > > On Mon, 7 Jan 2013 14:16:27 -0800 "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> wrote:
> > > >
> > > > On Mon, Jan 07, 2013 at 11:42:36AM -0800, Randy Dunlap wrote:
> > > > > 
> > > > > on i386 or x86_64:
> > > > > 
> > > > > ERROR: "trace_clock_local" [kernel/rcutorture.ko] undefined!
> > > > 
> > > > Hello, Randy,
> > > > 
> > > > Did your build include the following, also pushed to -next in that same
> > > > batch from -rcu?  Including Steven Rostedt on CC for his take.
> > > 
> > > That commit was certainly in next-20130107.
> > 
> > Could be bad config dependencies.
> 
> Paul,
> 
> You need to also select TRACE_CLOCK if you are going to use it.

Thank you, Steve!

Randy, does the following patch help?

							Thanx, Paul

------------------------------------------------------------------------

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index ce75d3b..b0fe7bd 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1010,6 +1010,7 @@ config RCU_CPU_STALL_INFO
 config RCU_TRACE
 	bool "Enable tracing for RCU"
 	depends on DEBUG_KERNEL
+	select TRACE_CLOCK
 	help
 	  This option provides tracing in RCU which presents stats
 	  in debugfs for debugging RCU implementation.

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