linux-kernel - Re: [PATCH 12/17] ARM: iop13xx: mark iop13xx_scan_bus as _

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Date:	Tue, 2 Oct 2012 14:08:03 -0600
From:	Bjorn Helgaas <bhelgaas@...gle.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	linux-arm-kernel@...radead.org, arm@...nel.org,
	linux-kernel@...r.kernel.org,
	Lennert Buytenhek <kernel@...tstofly.org>,
	Dan Williams <djbw@...com>
Subject: Re: [PATCH 12/17] ARM: iop13xx: mark iop13xx_scan_bus as __devinit

On Tue, Oct 2, 2012 at 10:36 AM, Arnd Bergmann <arnd@...db.de> wrote:
> pci_scan_root_bus is __devinit, so iop13xx_scan_bus has to be the
> same in order to safely call it. This is ok because the function
> itself is only called from the hwpci->scan callback.
>
> WARNING: vmlinux.o(.text+0x10138): Section mismatch in reference from the function iop13xx_scan_bus() to the function .devinit.text:pci_scan_root_bus()
> The function iop13xx_scan_bus() references
> the function __devinit pci_scan_root_bus().
> This is often because iop13xx_scan_bus lacks a __devinit
> annotation or the annotation of pci_scan_root_bus is wrong.

With CONFIG_HOTPLUG going away (I think the current state is that it
is always set to "y"), __devinit will effectively become a no-op, so I
expect we'll remove it from pci_scan_root_bus().

Therefore, I would skip this patch and live with the warning a little longer.

> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Cc: Bjorn Helgaas <bhelgaas@...gle.com>
> Cc: Lennert Buytenhek <kernel@...tstofly.org>
> Cc: Dan Williams <djbw@...com>
> ---
>  arch/arm/mach-iop13xx/pci.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm/mach-iop13xx/pci.c b/arch/arm/mach-iop13xx/pci.c
> index 861cb12..9d7f4ca 100644
> --- a/arch/arm/mach-iop13xx/pci.c
> +++ b/arch/arm/mach-iop13xx/pci.c
> @@ -506,7 +506,7 @@ iop13xx_pci_abort(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
>
>  /* Scan an IOP13XX PCI bus.  nr selects which ATU we use.
>   */
> -struct pci_bus *iop13xx_scan_bus(int nr, struct pci_sys_data *sys)
> +struct pci_bus * __devinit iop13xx_scan_bus(int nr, struct pci_sys_data *sys)
>  {
>         int which_atu;
>         struct pci_bus *bus = NULL;
> --
> 1.7.10
>
--
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