linux-kernel - Re: (hacky) [PATCH] silence MODPOST section mismatch warnings

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Message-ID: <20070510204037.GE29713@flint.arm.linux.org.uk>
Date:	Thu, 10 May 2007 21:40:38 +0100
From:	Russell King <rmk+lkml@....linux.org.uk>
To:	Chris Wedgwood <cw@...f.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Sam Ravnborg <sam@...nborg.org>
Subject: Re: (hacky) [PATCH] silence MODPOST section mismatch warnings

On Thu, May 10, 2007 at 01:34:18PM -0700, Chris Wedgwood wrote:
> MODPOST seems to be spewing bogus warnings.  It's not clear how best
> to fix it so perhaps we should silence it for now?

I agree.  Example bogus warning:

WARNING: arch/arm/mach-iop32x/built-in.o - Section mismatch:
 reference to .init.text: from .data between 'iq80321_timer'
 (at offset 0x428) and 'iq80321_serial_device'

c04088fc d iq80321_timer
c0408950 d iq80321_serial_device

It's completely unclear what is referencing what, what the two named
symbols mean, and even what "at offset" relates to.

What I can say is that iq80321_timer doesn't reference iq80321_serial_device
nor vice versa, and iq80321_timer is far smaller than 0x428 bytes.

> 
> diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
> index 113dc77..bd6fe7b 100644
> --- a/scripts/mod/modpost.c
> +++ b/scripts/mod/modpost.c
> @@ -872,6 +872,10 @@ static void warn_sec_mismatch(const char *modname, const char *fromsec,
>  				 sechdrs[hdr->e_shstrndx].sh_offset;
>  	const char *secname = secstrings + sechdrs[sym->st_shndx].sh_name;
>  
> +	/* FIXME: this function doesn't work correctly anymore, it's
> +	 * not clear if it should be fixed or removed. */
> +	return;
> +
>  	find_symbols_between(elf, r.r_offset, fromsec, &before, &after);
>  
>  	refsym = find_elf_symbol(elf, r.r_addend, sym);

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:
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