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driver core: make kobj_type constant.

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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>
This commit is contained in:
Wedson Almeida Filho 2021-12-24 23:13:45 +00:00 • committed by Greg Kroah-Hartman
parent 67e532a42c
commit ee6d3dd4ed
6 changed files with 13 additions and 13 deletions
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8
include/linux/kobject.h
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@ -66,7 +66,7 @@ struct kobject {
struct list_head entry;
struct kobject *parent;
struct kset *kset;
struct kobj_type *ktype;
const struct kobj_type *ktype;
struct kernfs_node *sd; /* sysfs directory entry */
struct kref kref;
#ifdef CONFIG_DEBUG_KOBJECT_RELEASE
@ -90,13 +90,13 @@ static inline const char *kobject_name(const struct kobject *kobj)
return kobj->name;
}
extern void kobject_init(struct kobject *kobj, struct kobj_type *ktype);
extern void kobject_init(struct kobject *kobj, const struct kobj_type *ktype);
extern __printf(3, 4) __must_check
int kobject_add(struct kobject *kobj, struct kobject *parent,
const char *fmt, ...);
extern __printf(4, 5) __must_check
int kobject_init_and_add(struct kobject *kobj,
struct kobj_type *ktype, struct kobject *parent,
const struct kobj_type *ktype, struct kobject *parent,
const char *fmt, ...);
extern void kobject_del(struct kobject *kobj);
@ -217,7 +217,7 @@ static inline void kset_put(struct kset *k)
kobject_put(&k->kobj);
}
static inline struct kobj_type *get_ktype(struct kobject *kobj)
static inline const struct kobj_type *get_ktype(struct kobject *kobj)
{
return kobj->ktype;
}