From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Tue, 2 Feb 2016 21:59:45 +0100
From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
Message-ID: <20160202205945.GC29937@hermes.click-hack.org>
References: <20160202195355.GC27804@deathstar>
 <20160202200235.GB29937@hermes.click-hack.org>
 <20160202203539.GD27804@deathstar>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20160202203539.GD27804@deathstar>
Subject: Re: [Xenomai] IMX6 Quad inconsistent lock state
List-Id: Discussions about the Xenomai project <xenomai.xenomai.org>
List-Unsubscribe: <http://xenomai.org/mailman/options/xenomai>,
 <mailto:xenomai-request@xenomai.org?subject=unsubscribe>
List-Archive: <http://xenomai.org/pipermail/xenomai/>
List-Post: <mailto:xenomai@xenomai.org>
List-Help: <mailto:xenomai-request@xenomai.org?subject=help>
List-Subscribe: <http://xenomai.org/mailman/listinfo/xenomai>,
 <mailto:xenomai-request@xenomai.org?subject=subscribe>
To: Michael Welling <mwelling@ieee.org>
Cc: xenomai@xenomai.org

On Tue, Feb 02, 2016 at 02:35:39PM -0600, Michael Welling wrote:
> On Tue, Feb 02, 2016 at 09:02:35PM +0100, Gilles Chanteperdrix wrote:
> > On Tue, Feb 02, 2016 at 01:53:55PM -0600, Michael Welling wrote:
> > > The kernel otherwise appears to be functional.
> > > How do I fix this?
> > 
> > Disable CONFIG_TRACE_IRQFLAGS. This means disabling CONFIG_LOCKDEP too.
> 
> Ah. I had to trace back the dependencies and found that I had CONFIG_PROVE_LOCKING
> and CONFIG_DEBUG_LOCK_ALLOC selected.
> 
> Unselecting those made the warning go away. Good enough for me.
> 
> Thanks!
> 
> Next up is getting the rtdm driver modules to build.
> 
> Here is the error output without the UART driver selected:
> ERROR: "__ipipe_smp_key" [drivers/xenomai/net/stack/rtmac/tdma/tdma.ko] undefined!
> ERROR: "__ipipe_smp_key" [drivers/xenomai/ipc/xeno_rtipc.ko] undefined!
> ERROR: "__ipipe_smp_key" [drivers/xenomai/can/xeno_can.ko] undefined!

An EXPORT_SYMBOL is missing in arch/arm/kernel/ipipe.c. Or you can
disable CONFIG_SMP_ON_UP.

> 
> 
> Here is the error output with the UART driver selected:
> /home/michael/projects/xenomai/imx_xeno/linux-3.18.20/drivers/xenomai/serial/rt_imx_uart.c:39:27: fatal error: mach/hardware.h: No such file or directory
>  #include <mach/hardware.h>
>                            ^
> compilation terminated.
> 
> Any quick hints?

Yes, the driver should be rebased on more recent versions of the
mainline driver, if that is possible. Probably using DT.

-- 
					    Gilles.
https://click-hack.org