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Date: Sun, 1 Feb 2009 14:28:09 +0100
Message-ID: <a25370a30902010528l2c11444ch843da0bfd91d05f@mail.gmail.com>
Subject: Re: Dynamic-ftrace not working in PlayStation3
From: Remis <remis.developer@googlemail.com>
To: Arnd Bergmann <arnd@arndb.de>
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Cc: linuxppc-dev@ozlabs.org, Paul Mackerras <paulus@samba.org>,
	Steven Rostedt <rostedt@goodmis.org>
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Complementing what Arnd said, we got the dynamic ftrace to work. Just
changed 4 things in the *menuconfig*.
Before these were built as modules (this is the default I guess):
CONFIG_USB=m
CONFIG_SOUND=m
CONFIG_SND=m
CONFIG_SND_USB_AUDIO=m

Then got them built into the kernel:
CONFIG_USB=y
CONFIG_SOUND=y
CONFIG_SND=y
CONFIG_SND_USB_AUDIO=y

And everything worked just fine.
In my config when I also tried to build the *CONFIG_SND_PS3* into the
kernel, the kernel did not boot (probably another bug !? :-).

Cheers,
Remis

On Sat, Jan 31, 2009 at 11:25 AM, Arnd Bergmann <arnd@arndb.de> wrote:
> On Saturday 31 January 2009, Geoff Levand wrote:
>> >
>> > So I take it that the above showed that the code worked for some?
>>
>> In my trials it blows up on the first load_module() call, and for my
>> config that was usbcore:
>
> I looked into it some more with Remis yesterday, and we got ftrace
> working by building usbcore and alsa into the kernel. Incidentally,
> usbcore is the largest module in this installation (~3MB), which
> indicates that it is in some way either related to the size of the
> module.
>
>> This ptr of 5f666f725f726573 seems bogus.  I think this code is not
>> working correctly:
>
> This is an ascii string "_for_res", probably part of
> usb_lock_device_for_reset. We saw the same behaviour, but
> a different string.
>
>        Arnd <><