kobject: Constify struct kset_uevent_ops

Constify struct kset_uevent_ops.

This is part of the ops structure constification
effort started by Arjan van de Ven et al.

Benefits of this constification:

 * prevents modification of data that is shared
   (referenced) by many other structure instances
   at runtime

 * detects/prevents accidental (but not intentional)
   modification attempts on archs that enforce
   read-only kernel data at runtime

 * potentially better optimized code as the compiler
   can assume that the const data cannot be changed

 * the compiler/linker move const data into .rodata
   and therefore exclude them from false sharing

Signed-off-by: Emese Revfy <re.emese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 5 insertions, 5 deletions

diff --git a/include/linux/kobject.h b/include/linux/kobject.h
index 58ae8e00fcd..57a1eaae909 100644
--- a/include/linux/kobject.h
+++ b/include/linux/kobject.h
@@ -118,9 +118,9 @@ struct kobj_uevent_env {
 };
 
 struct kset_uevent_ops {
-        int (*filter)(struct kset *kset, struct kobject *kobj);
-        const char *(*name)(struct kset *kset, struct kobject *kobj);
-        int (*uevent)(struct kset *kset, struct kobject *kobj,
+        int (* const filter)(struct kset *kset, struct kobject *kobj);
+        const char *(* const name)(struct kset *kset, struct kobject *kobj);
+        int (* const uevent)(struct kset *kset, struct kobject *kobj,
                       struct kobj_uevent_env *env);
 };
 
@@ -155,14 +155,14 @@ struct kset {
         struct list_head list;
         spinlock_t list_lock;
         struct kobject kobj;
-        struct kset_uevent_ops *uevent_ops;
+        const struct kset_uevent_ops *uevent_ops;
 };
 
 extern void kset_init(struct kset *kset);
 extern int __must_check kset_register(struct kset *kset);
 extern void kset_unregister(struct kset *kset);
 extern struct kset * __must_check kset_create_and_add(const char *name,
-                                                struct kset_uevent_ops *u,
+                                                const struct kset_uevent_ops *u,
                                                 struct kobject *parent_kobj);
 
 static inline struct kset *to_kset(struct kobject *kobj)