Re: [PATCH 2/4 v8] i.MX31: Image Processing Unit DMA and IRQ drivers

From: Valentin Longchamp <valentin.longchamp@epfl.ch>
To: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>,
	"linux-arm-kernel@lists.arm.linux.org.uk"
	<linux-arm-kernel@lists.arm.linux.org.uk>,
	Sascha Hauer <s.hauer@pengutronix.de>,
	Dan Williams <dan.j.williams@intel.com>,
	"linux-fbdev-devel@lists.sourceforge.net"
	<linux-fbdev-devel@lists.sourceforge.net>
Subject: Re: [PATCH 2/4 v8] i.MX31: Image Processing Unit DMA and IRQ drivers
Date: Fri, 23 Jan 2009 14:21:54 +0100	[thread overview]
Message-ID: <4979C472.10707@epfl.ch> (raw)
In-Reply-To: <20090123131804.GI26184@n2100.arm.linux.org.uk>

Russell King - ARM Linux wrote:
> On Fri, Jan 23, 2009 at 02:12:31PM +0100, Guennadi Liakhovetski wrote:
>> On Fri, 23 Jan 2009, Valentin Longchamp wrote:
>>
>>> Well no miracle is taking place (And I have checked, the kernel I am
>>> running is the correct one according to the build date tag with uname).
>>> For me the initcalls are:
>>>
>>> c0019390 <__initcall_misc_init4>:
>>> c0019394 <__initcall_ipu_init4>:
>>> c0019398 <__initcall_proto_init4>:
>>>
>>> (Not exactly the same addresses as before because I add some pr_debug
>>> calls for debug). But none of them are called. And all of them are
>>> subsys_initcall. Do I have to enable something in my configuration so
>>> that these initcall actually get called ?
>> Let's say, this is the first time that I run into a situation when some 
>> initcalls do not get called, and I never bothered setting any special 
>> config variable for that, and it would surprise me a _lot_ if such a 
>> variable existed... What kernel version is this?

It's 2.6.29-rc2 from Linus's tree.

> 
> Well, the code which runs the initcalls steps through the array of
> function pointers built by the linker one word at a time.  So the
> only way an initcall could be missed in the middle of the array is
> if:
> 
> 1. the linker omitted the call (IOW buggy toolchain)
> 2. something corrupted kernel memory
> 
> I've personally never seen a situation where only some initcalls are
> called, but then I tend to hang on to known reliable toolchains.
> 

OK this may be a problem: I use the toolchain that is built by
OpeneEmbedded. I could give a try to another one. Where can I download
the ones you use Guennadi or Russel ?

Thanks

Val

-- 
Valentin Longchamp, PhD Student, EPFL-STI-LSRO1
valentin.longchamp@epfl.ch, Phone: +41216937827
http://people.epfl.ch/valentin.longchamp
MEA3485, Station 9, CH-1015 Lausanne

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