[PATCH] coresight: make coresight_bustype const

[Greg Kroah-Hartman]

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

Cc: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
Cc: Mike Leach <mike.leach@xxxxxxxxxx>
Cc: James Clark <james.clark@xxxxxxx>
Cc: Leo Yan <leo.yan@xxxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: coresight@xxxxxxxxxxxxxxxx
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/hwtracing/coresight/coresight-core.c | 2 +-
 include/linux/coresight.h                    | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-core.c b/drivers/hwtracing/coresight/coresight-core.c
index 9fabe00a40d6..24c49e581737 100644
--- a/drivers/hwtracing/coresight/coresight-core.c
+++ b/drivers/hwtracing/coresight/coresight-core.c
@@ -1796,7 +1796,7 @@ char *coresight_alloc_device_name(struct coresight_dev_list *dict,
 }
 EXPORT_SYMBOL_GPL(coresight_alloc_device_name);
 
-struct bus_type coresight_bustype = {
+const struct bus_type coresight_bustype = {
 	.name	= "coresight",
 };
 
diff --git a/include/linux/coresight.h b/include/linux/coresight.h
index a269fffaf991..8fe75a0d7693 100644
--- a/include/linux/coresight.h
+++ b/include/linux/coresight.h
@@ -35,7 +35,7 @@
 
 #define CORESIGHT_UNLOCK	0xc5acce55
 
-extern struct bus_type coresight_bustype;
+extern const struct bus_type coresight_bustype;
 
 enum coresight_dev_type {
 	CORESIGHT_DEV_TYPE_SINK,
-- 
2.43.0