Re: [PATCH] tty: serdev: fix missing static modifier on DEVICE_ATTR_RO(modalias)

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Thu, Apr 26, 2018 at 10:33:58PM -0500, David Lechner wrote:
> This fixes the compile error "multiple definition of `dev_attr_modalias'"
> by adding the static modifier to DEVICE_ATTR_RO(modalias).
> 
> This change was made in the mainline kernel in 2460942f51f1 ("serdev: do
> not generate modaliases for controllers") along with some other changes.
> 
> Fixes: 4fe99816a1ab ("tty: serdev: use dev_groups and not dev_attrs for bus_type")
> Cc: Hans de Goede <hdegoede@redhat.com>
> Cc: Johan Hovold <johan@kernel.org>
> Cc: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: <stable@vger.kernel.org> # 4.14.x
> Signed-off-by: David Lechner <david@lechnology.com>
> ---
> 
> Should we pick up the patch 2460942f51f1 ("serdev: do not generate modaliases
> for controllers") for stable or is this patch good enough?
> 
>  drivers/tty/serdev/core.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c
> index 97db76afced2..25298b7b2419 100644
> --- a/drivers/tty/serdev/core.c
> +++ b/drivers/tty/serdev/core.c
> @@ -276,7 +276,7 @@ static ssize_t modalias_show(struct device *dev,
>  {
>  	return of_device_modalias(dev, buf, PAGE_SIZE);
>  }
> -DEVICE_ATTR_RO(modalias);
> +static DEVICE_ATTR_RO(modalias);
>  
>  static struct attribute *serdev_device_attrs[] = {
>  	&dev_attr_modalias.attr,

This patch implies that there is also another "global" modalias variable
somewhere in the system, right?  Where is that one being defined?

And I do like to keep original commits for stable trees, but this one
might be ok here, if we figure out what this is conflicting with.

thanks,

greg k-h