linux-kernel - Re: [PATCH] move cfag12864bfb's probe function to .devinit.text

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Message-ID: <ca2dc2820901200013y3723785cjb4ca4a0e223f7993@mail.gmail.com>
Date:	Tue, 20 Jan 2009 09:13:25 +0100
From:	Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] move cfag12864bfb's probe function to .devinit.text

On Mon, Jan 12, 2009 at 11:24 PM, Uwe Kleine-König
<u.kleine-koenig@...gutronix.de> wrote:
> A pointer to cfag12864bfb_probe is passed to the core via
> platform_driver_register and so the function must not disappear when the
> .init sections are discarded.  Otherwise (if also having HOTPLUG=y)
> unbinding and binding a device to the driver via sysfs will result in an
> oops as does a device being registered late.

Thank you for the patch!

>
> An alternative to this patch is using platform_driver_probe instead of
> platform_driver_register plus removing the pointer to the probe function
> from the struct platform_driver.

Is that solution better? What are the pros/cons?

>
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
> ---
>  drivers/auxdisplay/cfag12864bfb.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/auxdisplay/cfag12864bfb.c b/drivers/auxdisplay/cfag12864bfb.c
> index fe3a865..b0ca5a4 100644
> --- a/drivers/auxdisplay/cfag12864bfb.c
> +++ b/drivers/auxdisplay/cfag12864bfb.c
> @@ -81,7 +81,7 @@ static struct fb_ops cfag12864bfb_ops = {
>        .fb_mmap = cfag12864bfb_mmap,
>  };
>
> -static int __init cfag12864bfb_probe(struct platform_device *device)
> +static int __devinit cfag12864bfb_probe(struct platform_device *device)
>  {
>        int ret = -EINVAL;
>        struct fb_info *info = framebuffer_alloc(0, &device->dev);
> --
> 1.5.6.5
>
> --
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