--- zzzz-none-000/linux-3.10.107/arch/s390/include/asm/cmb.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/s390/include/asm/cmb.h	2021-02-04 17:41:59.000000000 +0000
@@ -6,6 +6,7 @@
 struct ccw_device;
 extern int enable_cmf(struct ccw_device *cdev);
 extern int disable_cmf(struct ccw_device *cdev);
+extern int __disable_cmf(struct ccw_device *cdev);
 extern u64 cmf_read(struct ccw_device *cdev, int index);
 extern int cmf_readall(struct ccw_device *cdev, struct cmbdata *data);