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

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Message-ID: <CAErSpo5Un=KFKyKNbUOXMtPcYoreWLb4rYb=+fDn+Qp8bGXc3Q@mail.gmail.com>
Date:	Tue, 2 Jul 2013 15:33:00 -0600
From:	Bjorn Helgaas <bhelgaas@...gle.com>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
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 3:29 PM, Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
> 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?

OK, I sent an xtensa patch to fix the
pci_scan_child_bus()/pcibios_fixup_bus() mismatch; I wouldn't be
surprised if that makes this pwmchip_add() thing go away, too.

Bjorn
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