linux-kernel - [PATCH v2] fsi: make fsi_bus

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Message-ID: <2025070100-overblown-busily-a04b@gregkh>
Date: Tue,  1 Jul 2025 14:07:01 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Eddie James <eajames@...ux.ibm.com>,
	Ninad Palsule <ninad@...ux.ibm.com>,
	linux-fsi@...ts.ozlabs.org
Subject: [PATCH v2] fsi: make fsi_bus_type constant

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

Cc: Eddie James <eajames@...ux.ibm.com>
Cc: Ninad Palsule <ninad@...ux.ibm.com>
Cc: linux-fsi@...ts.ozlabs.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
v2: fix up subject line to be correct

 drivers/fsi/fsi-core.c | 2 +-
 include/linux/fsi.h    | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/fsi/fsi-core.c b/drivers/fsi/fsi-core.c
index 50e8736039fe..ee39d1699387 100644
--- a/drivers/fsi/fsi-core.c
+++ b/drivers/fsi/fsi-core.c
@@ -1404,7 +1404,7 @@ void fsi_driver_unregister(struct fsi_driver *fsi_drv)
 }
 EXPORT_SYMBOL_GPL(fsi_driver_unregister);
 
-struct bus_type fsi_bus_type = {
+const struct bus_type fsi_bus_type = {
 	.name		= "fsi",
 	.match		= fsi_bus_match,
 };
diff --git a/include/linux/fsi.h b/include/linux/fsi.h
index 8c5eef808788..adea1b432f2d 100644
--- a/include/linux/fsi.h
+++ b/include/linux/fsi.h
@@ -68,7 +68,7 @@ extern int fsi_slave_read(struct fsi_slave *slave, uint32_t addr,
 extern int fsi_slave_write(struct fsi_slave *slave, uint32_t addr,
 		const void *val, size_t size);
 
-extern struct bus_type fsi_bus_type;
+extern const struct bus_type fsi_bus_type;
 extern const struct device_type fsi_cdev_type;
 
 enum fsi_dev_type {
-- 
2.50.0