On 11/08/2024 10:30 am, Christophe JAILLET wrote:

'struct config_item_type' is not modified in this driver.

These structures are only used with config_group_init_type_name() which takes a "const struct config_item_type *" as a 3rd argument or with struct config_group.cg_item.ci_type which is also a "const struct config_item_type *".

Constifying this structure moves some data to a read-only section, so increase overall security, especially when the structure holds some function pointers.

On a x86_64, with allmodconfig: Before: ====== text data bss dec hex filename 4904 1376 136 6416 1910 drivers/hwtracing/coresight/coresight-syscfg-configfs.o

After:

text	   data	    bss	    dec	    hex	filename
5264	   1120	     16	   6400	   1900	drivers/hwtracing/coresight/coresight-syscfg-configfs.o

Signed-off-by: Christophe JAILLET christophe.jaillet@wanadoo.fr

Compile tested-only.

.../hwtracing/coresight/coresight-syscfg-configfs.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-syscfg-configfs.c b/drivers/hwtracing/coresight/coresight-syscfg-configfs.c index 433ede94dd63..213b4159b062 100644 --- a/drivers/hwtracing/coresight/coresight-syscfg-configfs.c +++ b/drivers/hwtracing/coresight/coresight-syscfg-configfs.c @@ -160,7 +160,7 @@ static struct configfs_attribute *cscfg_config_view_attrs[] = { NULL, }; -static struct config_item_type cscfg_config_view_type = { +static const struct config_item_type cscfg_config_view_type = { .ct_owner = THIS_MODULE, .ct_attrs = cscfg_config_view_attrs, }; @@ -170,7 +170,7 @@ static struct configfs_attribute *cscfg_config_preset_attrs[] = { NULL, }; -static struct config_item_type cscfg_config_preset_type = { +static const struct config_item_type cscfg_config_preset_type = { .ct_owner = THIS_MODULE, .ct_attrs = cscfg_config_preset_attrs, }; @@ -272,7 +272,7 @@ static struct configfs_attribute *cscfg_feature_view_attrs[] = { NULL, }; -static struct config_item_type cscfg_feature_view_type = { +static const struct config_item_type cscfg_feature_view_type = { .ct_owner = THIS_MODULE, .ct_attrs = cscfg_feature_view_attrs, }; @@ -309,7 +309,7 @@ static struct configfs_attribute *cscfg_param_view_attrs[] = { NULL, }; -static struct config_item_type cscfg_param_view_type = { +static const struct config_item_type cscfg_param_view_type = { .ct_owner = THIS_MODULE, .ct_attrs = cscfg_param_view_attrs, }; @@ -380,7 +380,7 @@ static struct config_group *cscfg_create_feature_group(struct cscfg_feature_desc return &feat_view->group; } -static struct config_item_type cscfg_configs_type = { +static const struct config_item_type cscfg_configs_type = { .ct_owner = THIS_MODULE, }; @@ -414,7 +414,7 @@ void cscfg_configfs_del_config(struct cscfg_config_desc *config_desc) } } -static struct config_item_type cscfg_features_type = { +static const struct config_item_type cscfg_features_type = { .ct_owner = THIS_MODULE, };

Reviewed-by: James Clark james.clark@linaro.org