linux-kernel - Re: Bug#609371: linux-image-2.6.37-trunk-sparc64: module scsi

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Message-ID: <4D3A0DC9.8010101@oldelvet.org.uk>
Date:	Fri, 21 Jan 2011 22:50:49 +0000
From:	Richard Mortimer <richm@...elvet.org.uk>
To:	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
CC:	David Miller <davem@...emloft.net>, rostedt@...dmis.org,
	609371@...s.debian.org, ben@...adent.org.uk,
	sparclinux@...r.kernel.org, linux-kernel@...r.kernel.org,
	fweisbec@...il.com, mingo@...hat.com
Subject: Re: Bug#609371: linux-image-2.6.37-trunk-sparc64: module scsi_mod:
 Unknown relocation: 36



On 21/01/2011 20:40, Mathieu Desnoyers wrote:
> * Richard Mortimer (richm@...elvet.org.uk) wrote:
> [...]
>> P.S. I saw your followup mail so hopefully this matches what you have found!
>
> Thanks for the info! At first glance, it does not seem to contradict my
> findings. When you find time, can you have a try at v3 I just posted ?
>
I'm setting the compilation off now. I will give it a whirl some time 
Saturday or Sunday.

Before I did that I created kernel/sched.s and have verified that the 
two error locations are accesses to it_func_ptr as you suspected.


ldx     [%g1+%lo(__tracepoint_sched_wakeup)+28], %l0    !, it_func_ptr
and
ldx     [%g3], %l2      !, it_func_ptr

with v3 of you patches applied it uses +32 to get the offset of 
it_func_ptr so that looks good.

> Make sure to start tracing in your tests, as I think the unaligned access only
> happens when accessing the struct tracepoint fields below the "int state" field.
>
Will do.

Regards

Richard
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