linux-kernel - [PATCH] PNP: make pnp_bus

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Date: Fri,  5 Jan 2024 13:51:21 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: rafael.j.wysocki@...el.com
Cc: linux-kernel@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-acpi@...r.kernel.org
Subject: [PATCH] PNP: make pnp_bus_type const

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

Cc: "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
Cc: linux-acpi@...r.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/pnp/driver.c | 2 +-
 include/linux/pnp.h  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/pnp/driver.c b/drivers/pnp/driver.c
index 46c534f6b1c9..0a5d0d8befa8 100644
--- a/drivers/pnp/driver.c
+++ b/drivers/pnp/driver.c
@@ -256,7 +256,7 @@ static const struct dev_pm_ops pnp_bus_dev_pm_ops = {
 	.restore = pnp_bus_resume,
 };
 
-struct bus_type pnp_bus_type = {
+const struct bus_type pnp_bus_type = {
 	.name    = "pnp",
 	.match   = pnp_bus_match,
 	.probe   = pnp_device_probe,
diff --git a/include/linux/pnp.h b/include/linux/pnp.h
index 267fb8a4fb6e..ddbe7c3ca4ce 100644
--- a/include/linux/pnp.h
+++ b/include/linux/pnp.h
@@ -435,7 +435,7 @@ struct pnp_protocol {
 #define protocol_for_each_dev(protocol, dev)	\
 	list_for_each_entry(dev, &(protocol)->devices, protocol_list)
 
-extern struct bus_type pnp_bus_type;
+extern const struct bus_type pnp_bus_type;
 
 #if defined(CONFIG_PNP)
 
-- 
2.43.0