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

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Date:	Tue, 18 Jan 2011 15:22:24 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Cc:	David Miller <davem@...emloft.net>, richm@...elvet.org.uk,
	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 Tue, 2011-01-18 at 15:13 -0500, Mathieu Desnoyers wrote:
> * Steven Rostedt (rostedt@...dmis.org) wrote:
> > On Tue, 2011-01-18 at 13:16 -0500, Steven Rostedt wrote:
> > > On Tue, 2011-01-18 at 12:33 -0500, Steven Rostedt wrote:
> > > > On Tue, 2011-01-18 at 11:46 -0500, Mathieu Desnoyers wrote:
> > > 
> > > > > Also align TRACE_PRINTKS on 8 bytes to make sure the beginning of the section is
> > > > > aligned on pointer size.
> > > > 
> > > > If I can make it crash without the alignments and this fixes the issue,
> > > > I'll apply both patches.
> > > 
> > > After applying David's patch, I do indeed get a crash. I'll now apply
> > > yours and see if it fixes the issue.
> > 
> > Your patch doesn't seem to fix it either. I'll investigate this further.
> 
> I think David's patch missed kernel/trace/trace_export.c
> 
> struct ftrace_event_call __used                                         \
> __attribute__((__aligned__(4)))                                         \
> __attribute__((section("_ftrace_events"))) event_##call = {             \
> 
> and kernel/trace/trace.h:
> 
> #define FTRACE_ENTRY(call, struct_name, id, tstruct, print)             \
>         extern struct ftrace_event_call                                 \
>         __attribute__((__aligned__(4))) event_##call;
> 
> does it help if you remove these ?

I doubt it, but I'll try it anyway.

-- Steve



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