-int kernfs_iop_permission(struct inode *inode, int mask);
-int kernfs_iop_setattr(struct dentry *dentry, struct iattr *iattr);
-int kernfs_iop_getattr(const struct path *path, struct kstat *stat,
+int kernfs_iop_permission(struct user_namespace *mnt_userns,
+ struct inode *inode, int mask);
+int kernfs_iop_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
+ struct iattr *iattr);
+int kernfs_iop_getattr(struct user_namespace *mnt_userns,
+ const struct path *path, struct kstat *stat,