linux-kernel - [PATCH 1/2] drm: display: make dp_aux_bus

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Date: Sat, 03 Feb 2024 15:25:03 -0300
From: "Ricardo B. Marliere" <ricardo@...liere.net>
To: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 "Ricardo B. Marliere" <ricardo@...liere.net>
Subject: [PATCH 1/2] drm: display: make dp_aux_bus_type const

Now that the driver core can properly handle constant struct bus_type,
move the dp_aux_bus_type variable to be a constant structure as well,
placing it into read-only memory which can not be modified at runtime.

Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Suggested-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Ricardo B. Marliere <ricardo@...liere.net>
---
 drivers/gpu/drm/display/drm_dp_aux_bus.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/display/drm_dp_aux_bus.c b/drivers/gpu/drm/display/drm_dp_aux_bus.c
index 8a165be1a821..5afc26be9d2a 100644
--- a/drivers/gpu/drm/display/drm_dp_aux_bus.c
+++ b/drivers/gpu/drm/display/drm_dp_aux_bus.c
@@ -127,7 +127,7 @@ static void dp_aux_ep_shutdown(struct device *dev)
 		aux_ep_drv->shutdown(to_dp_aux_ep_dev(dev));
 }

-static struct bus_type dp_aux_bus_type = {
+static const struct bus_type dp_aux_bus_type = {
 	.name		= "dp-aux",
 	.match		= dp_aux_ep_match,
 	.probe		= dp_aux_ep_probe,

-- 
2.43.0