linux-kernel - Re: 2.6.22.6: still seeing section mismatch warnings

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Message-ID: <20070913083505.GA12944@janus>
Date:	Thu, 13 Sep 2007 10:35:05 +0200
From:	Frank van Maarseveen <frankvm@...nkvm.com>
To:	Sam Ravnborg <sam@...nborg.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: 2.6.22.6: still seeing section mismatch warnings

On Thu, Sep 13, 2007 at 09:02:00AM +0200, Sam Ravnborg wrote:
> On Wed, Sep 12, 2007 at 06:00:17PM +0200, Frank van Maarseveen wrote:
> > I'm still seeing the warnings below (2.6.22 started off with lots of
> > section mismatch warning) but I have no idea if it is safe to ignore
> > these:
> > 
> > WARNING: arch/i386/kernel/built-in.o(.text+0xea62): Section mismatch: reference to .init.data:trampoline_end (between 'setup_trampoline' and 'cpu_coregroup_map')
> > WARNING: arch/i386/kernel/built-in.o(.text+0xea67): Section mismatch: reference to .init.data:trampoline_data (between 'setup_trampoline' and 'cpu_coregroup_map')
> > WARNING: arch/i386/kernel/built-in.o(.text+0xea79): Section mismatch: reference to .init.data:trampoline_data (between 'setup_trampoline' and 'cpu_coregroup_map')
> > WARNING: arch/i386/kernel/built-in.o(.exit.text+0x26): Section mismatch: reference to .init.text: (between 'cache_remove_dev' and 'ffh_cstate_exit')
> > WARNING: arch/i386/kernel/built-in.o(.data+0xee0): Section mismatch: reference to .init.text: (between 'thermal_throttle_cpu_notifier' and 'mce_work')
> > WARNING: kernel/built-in.o(.text+0x1b415): Section mismatch: reference to .init.text: (between 'kthreadd' and 'init_waitqueue_head')
> > 
> > 
> > gcc version 3.4.6 (Debian 3.4.6-5)
> 
> Does not appear with an allmodconfig.
> Care to send me your .config then I may take a look.

See attached .config

> 
> The warnings are the kernel being much more anal with respect to use
> of __init sections and friends and you can for normal use ignore them.
> They usually find bugs in errorhandling which seldom trigger and
> the bugs has been there for ages in most cases - but it is onyl now
> we detect them.

thanks,

-- 
Frank

View attachment ".config" of type "text/plain" (46578 bytes)