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

[David Lechner <david@lechnology.com>]

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,
-- 
2.17.0