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kobject: Constify struct kset_uevent_ops

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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>
This commit is contained in:
Emese Revfy 2009-12-31 14:52:51 +01:00 • committed by Greg Kroah-Hartman
parent 985fc176a6
commit 9cd43611cc
9 changed files with 14 additions and 14 deletions
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10
include/linux/kobject.h
View file

@ -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)