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Date: Wed, 25 Jul 2007 09:27:12 +0200
From: Sam Ravnborg <sam@ravnborg.org>
To: Kumar Gala <galak@kernel.crashing.org>
Subject: Re: modpost warning question
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Cc: linuxppc-dev@ozlabs.org, linux-kernel@vger.kernel.org,
	Jeff Garzik <jeff@garzik.org>, netdev@vger.kernel.org
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On Wed, Jul 25, 2007 at 02:14:12AM -0500, Kumar Gala wrote:
> I'm seeing the following warning:
> 
> WARNING: vmlinux.o(.init.text+0x1acdc): Section mismatch: reference to
> .exit.text:gfar_mdio_exit (between 'gfar_init' and 'gfar_mdio_init')
> 
> I don't understand why its not ok to access .exit.text from .init.text

Several architectures discards .exit.text in the final linker
script (arch/$(ARCH)/kernel/vmlinux.lds.S

So any references to .exit.text will when a module is build-in result
in a linker error because ld will flag it as an error when we reference
a symbol in a discarded section.

For the popular architectures (i386,x86_64) we discard .exit.text at
runtime so here we do not see the error from ld (sadly).

	Sam