-extern struct sysfs_dirent *sysfs_get_active(struct sysfs_dirent *sd);
-extern void sysfs_put_active(struct sysfs_dirent *sd);
-extern struct sysfs_dirent *sysfs_get_active_two(struct sysfs_dirent *sd);
-extern void sysfs_put_active_two(struct sysfs_dirent *sd);
-extern void sysfs_deactivate(struct sysfs_dirent *sd);
-
-extern void sysfs_delete_inode(struct inode *inode);
-extern void sysfs_init_inode(struct sysfs_dirent *sd, struct inode *inode);
-extern struct inode * sysfs_get_inode(struct sysfs_dirent *sd);
-extern void sysfs_instantiate(struct dentry *dentry, struct inode *inode);
-
-extern void release_sysfs_dirent(struct sysfs_dirent * sd);
-extern int sysfs_dirent_exist(struct sysfs_dirent *, const unsigned char *);
-extern struct sysfs_dirent *sysfs_new_dirent(const char *name, umode_t mode,
- int type);
-extern void sysfs_attach_dirent(struct sysfs_dirent *sd,
- struct sysfs_dirent *parent_sd,
- struct dentry *dentry);
-
-extern int sysfs_add_file(struct dentry *, const struct attribute *, int);
-extern int sysfs_hash_and_remove(struct dentry * dir, const char * name);
-extern struct sysfs_dirent *sysfs_find(struct sysfs_dirent *dir, const char * name);
-
-extern int sysfs_create_subdir(struct kobject *, const char *, struct dentry **);
-extern void sysfs_remove_subdir(struct dentry *);
-
-extern void sysfs_drop_dentry(struct sysfs_dirent *sd);
-extern int sysfs_setattr(struct dentry *dentry, struct iattr *iattr);
-
-extern spinlock_t sysfs_lock;
-extern spinlock_t kobj_sysfs_assoc_lock;
-extern struct rw_semaphore sysfs_rename_sem;
-extern struct super_block * sysfs_sb;