Re: [PATCH] bus: fsl-mc: make fsl_mc_bus_type const

From: Christophe Leroy
Date: Fri Aug 23 2024 - 13:00:42 EST




Le 23/08/2024 à 08:24, Kunwu Chan a écrit :
[Vous ne recevez pas souvent de courriers de kunwu.chan@xxxxxxxxx. Découvrez pourquoi ceci est important à https://aka.ms/LearnAboutSenderIdentification ]

From: Kunwu Chan <chentao@xxxxxxxxxx>

Since commit d492cc2573a0 ("driver core: device.h: make struct
bus_type a const *"), the driver core can properly handle constant
struct bus_type, move the fsl_mc_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@xxxxxxxxxxxxxxxxxxx>
Suggested-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Kunwu Chan <chentao@xxxxxxxxxx>

Acked-by: Christophe Leroy <christophe.leroy@xxxxxxxxxx> # for include/linux/fsl/mc.h

---
drivers/bus/fsl-mc/fsl-mc-bus.c | 2 +-
include/linux/fsl/mc.h | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/bus/fsl-mc/fsl-mc-bus.c b/drivers/bus/fsl-mc/fsl-mc-bus.c
index dd68b8191a0a..930d8a3ba722 100644
--- a/drivers/bus/fsl-mc/fsl-mc-bus.c
+++ b/drivers/bus/fsl-mc/fsl-mc-bus.c
@@ -309,7 +309,7 @@ static struct attribute *fsl_mc_bus_attrs[] = {

ATTRIBUTE_GROUPS(fsl_mc_bus);

-struct bus_type fsl_mc_bus_type = {
+const struct bus_type fsl_mc_bus_type = {
.name = "fsl-mc",
.match = fsl_mc_bus_match,
.uevent = fsl_mc_bus_uevent,
diff --git a/include/linux/fsl/mc.h b/include/linux/fsl/mc.h
index 083c860fd28e..c90ec889bfc2 100644
--- a/include/linux/fsl/mc.h
+++ b/include/linux/fsl/mc.h
@@ -436,7 +436,7 @@ void fsl_mc_free_irqs(struct fsl_mc_device *mc_dev);
struct fsl_mc_device *fsl_mc_get_endpoint(struct fsl_mc_device *mc_dev,
u16 if_id);

-extern struct bus_type fsl_mc_bus_type;
+extern const struct bus_type fsl_mc_bus_type;

extern struct device_type fsl_mc_bus_dprc_type;
extern struct device_type fsl_mc_bus_dpni_type;
--
2.43.0