[PATCH] ACPI: bus: make acpi_bus_type const

Ricardo B. Marliere
2024-02-11T15:36:44Z

Now that the driver core can properly handle constant struct bus_type,
move the acpi_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@linuxfoundation.org>
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ricardo B. Marliere <ricardo@marliere.net>
---
drivers/acpi/bus.c | 2 +-
include/acpi/acpi_bus.h | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 569bd15f211b..d9fa730416f1 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -1097,7 +1097,7 @@ static void acpi_device_remove(struct device *dev)
put_device(dev);
}

-struct bus_type acpi_bus_type = {
+const struct bus_type acpi_bus_type = {
.name = "acpi",
.match = acpi_bus_match,
.probe = acpi_device_probe,
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index e4d24d3f9abb..f67aa93ba53e 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -582,7 +582,7 @@ void acpi_initialize_hp_context(struct acpi_device *adev,
void (*uevent)(struct acpi_device *, u32));

/* acpi_device.dev.bus == &acpi_bus_type */
-extern struct bus_type acpi_bus_type;
+extern const struct bus_type acpi_bus_type;

int acpi_bus_for_each_dev(int (*fn)(struct device *, void *), void *data);
int acpi_dev_for_each_child(struct acpi_device *adev,

---
base-commit: c3c4923f2082353762e8f46dec6e3b0f165a1606
change-id: 20240211-bus_cleanup-acpi-7ad5cc04089c

Best regards,
--
Ricardo B. Marliere <ricardo@marliere.net>