driver core: make kobj_type constant.
This way instances of kobj_type (which contain function pointers) can be
stored in .rodata, which means that they cannot be [easily/accidentally]
modified at runtime.
Signed-off-by: Wedson Almeida Filho <wedsonaf@google.com>
Link: https://lore.kernel.org/r/20211224231345.777370-1-wedsonaf@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/lib/kobject.c b/lib/kobject.c
index 4a56f51..56fa037 100644
--- a/lib/kobject.c
+++ b/lib/kobject.c
@@ -65,7 +65,7 @@ void kobject_get_ownership(struct kobject *kobj, kuid_t *uid, kgid_t *gid)
*/
static int populate_dir(struct kobject *kobj)
{
- struct kobj_type *t = get_ktype(kobj);
+ const struct kobj_type *t = get_ktype(kobj);
struct attribute *attr;
int error = 0;
int i;
@@ -346,7 +346,7 @@ EXPORT_SYMBOL(kobject_set_name);
* to kobject_put(), not by a call to kfree directly to ensure that all of
* the memory is cleaned up properly.
*/
-void kobject_init(struct kobject *kobj, struct kobj_type *ktype)
+void kobject_init(struct kobject *kobj, const struct kobj_type *ktype)
{
char *err_str;
@@ -461,7 +461,7 @@ EXPORT_SYMBOL(kobject_add);
* same type of error handling after a call to kobject_add() and kobject
* lifetime rules are the same here.
*/
-int kobject_init_and_add(struct kobject *kobj, struct kobj_type *ktype,
+int kobject_init_and_add(struct kobject *kobj, const struct kobj_type *ktype,
struct kobject *parent, const char *fmt, ...)
{
va_list args;
@@ -679,7 +679,7 @@ EXPORT_SYMBOL(kobject_get_unless_zero);
static void kobject_cleanup(struct kobject *kobj)
{
struct kobject *parent = kobj->parent;
- struct kobj_type *t = get_ktype(kobj);
+ const struct kobj_type *t = get_ktype(kobj);
const char *name = kobj->name;
pr_debug("kobject: '%s' (%p): %s, parent %p\n",
