linux-kernel - Re: [PATCH] w90p910_ether: remove incorrect _

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Date:   Fri, 14 Dec 2018 23:22:10 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     David Miller <davem@...emloft.net>
Cc:     Wan ZongShun <mcuos.com@...il.com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Networking <netdev@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] w90p910_ether: remove incorrect __init annotation

On Fri, Dec 14, 2018 at 10:23 PM David Miller <davem@...emloft.net> wrote:
>
> From: Arnd Bergmann <arnd@...db.de>
> Date: Mon, 10 Dec 2018 21:45:07 +0100
>
> > The get_mac_address() function is normally inline, but when it is
> > not, we get a warning that this configuration is broken:
> >
> > WARNING: vmlinux.o(.text+0x4aff00): Section mismatch in reference from the function w90p910_ether_setup() to the function .init.text:get_mac_address()
> > The function w90p910_ether_setup() references
> > the function __init get_mac_address().
> > This is often because w90p910_ether_setup lacks a __init
> >
> > Remove the __init to make it always do the right thing.
> >
> > Signed-off-by: Arnd Bergmann <arnd@...db.de>
>
> Actually I think we can validly mark w90p910_ether_setup() and
> w90p910_probe() with appropriate init tagging.  None of these
> functions are invoked outside of the probing paths.

But then we have to change the driver to use
module_platform_driver_probe(), to ensure we cannot
unbind/rebind the device. I usually don't like doing that,
unless the device can never be stopped after it has
been initialized.

       Arnd

       Arnd