[PATCH v2] fsi: make fsi_bus_type constant

[PATCH v2] fsi: make fsi_bus_type constant

[Greg Kroah-Hartman]

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@linux.ibm.com>
Cc: Ninad Palsule <ninad@linux.ibm.com>
Cc: linux-fsi@lists.ozlabs.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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

Re: [PATCH v2] fsi: make fsi_bus_type constant

[Eddie James]

On 7/1/25 07:07, Greg Kroah-Hartman wrote:
> 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.


Reviewed-by: Eddie James <eajames@linux.ibm.com>


Thanks Greg.


>
> Cc: Eddie James <eajames@linux.ibm.com>
> Cc: Ninad Palsule <ninad@linux.ibm.com>
> Cc: linux-fsi@lists.ozlabs.org
> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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 {