linux-kernel - [PATCH 1/2] platform: x86: wmi: make wmi_bus

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Message-Id: <20240204-bus_cleanup-platform-drivers-x86-v1-1-1f0839b385c6@marliere.net>
Date: Sun, 04 Feb 2024 11:40:16 -0300
From: "Ricardo B. Marliere" <ricardo@...liere.net>
To: Armin Wolf <W_Armin@....de>, Hans de Goede <hdegoede@...hat.com>, 
 Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Cc: platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 "Ricardo B. Marliere" <ricardo@...liere.net>
Subject: [PATCH 1/2] platform: x86: wmi: make wmi_bus_type const

Now that the driver core can properly handle constant struct bus_type,
move the wmi_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/platform/x86/wmi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c
index 7ef1e82dc61c..859dfff515d0 100644
--- a/drivers/platform/x86/wmi.c
+++ b/drivers/platform/x86/wmi.c
@@ -219,7 +219,7 @@ static int wmidev_match_guid(struct device *dev, const void *data)
 	return 0;
 }

-static struct bus_type wmi_bus_type;
+static const struct bus_type wmi_bus_type;

 static struct wmi_device *wmi_find_device_by_guid(const char *guid_string)
 {
@@ -899,7 +899,7 @@ static struct class wmi_bus_class = {
 	.name = "wmi_bus",
 };

-static struct bus_type wmi_bus_type = {
+static const struct bus_type wmi_bus_type = {
 	.name = "wmi",
 	.dev_groups = wmi_groups,
 	.match = wmi_dev_match,

-- 
2.43.0