linux-kernel - Re: Build regressions/improvements in v3.10

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Message-ID: <CAMuHMdWoTMEyyph8aEu46+xHfkXRFN_qn4a987n7eo6EPRyyhw@mail.gmail.com>
Date:	Tue, 2 Jul 2013 23:29:49 +0200
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
Cc:	Linux Kernel Development <linux-kernel@...r.kernel.org>,
	linux-xtensa@...ux-xtensa.org,
	linux-kbuild <linux-kbuild@...r.kernel.org>
Subject: Re: Build regressions/improvements in v3.10

On Tue, Jul 2, 2013 at 8:34 PM, Bjorn Helgaas <bhelgaas@...gle.com> wrote:
>>   + warning: vmlinux.o(.text+0x1ad7a4): Section mismatch in reference from the function pwmchip_add() to the function .init.text:pcibios_fixup_bus():  => N/A
>>   + warning: vmlinux.o(.text+0x1b18d8): Section mismatch in reference from the function pci_scan_child_bus() to the function .init.text:pcibios_fixup_bus():  => N/A
>
> I understand the second warning, but not the first (reference from
> pwmchip_add() to pcibios_fixup_bus()).  I don't think pwmchip_add()
> calls pcibios_fixup_bus().  Is the pwmchip_chip() function name
> inexact, or is there some other problem here?

Indeed, that's weird.

This happened with xtensa-allmodconfig.
I compiled my own xtensa-allmodconfig kernel, and it happens there, too.

If I'm not mistaken, the hex address between parentheses should match
the "from" function, right?
After disassembly ("xtensa-linux-objdump -D vmlinux"), the addresses
didn't seem to match the function names at all.
So it may be an issue with the toolchain?

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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