How to update s390x kernel

grubby –set-default=/boot/vmlinuz-3.10.0-54.el7.s390x.debug

grubby –default-kernel

/boot/vmlinuz-3.10.0-54.el7.s390x.debug

zipl

Using config file ‘/etc/zipl.conf’ Run /lib/s390-tools/zipl_helper.device-mapper /boot Building bootmap in ‘/boot’ Building menu ‘zipl-automatic-menu’ Adding #1: IPL section ‘3.10.0-54.el7.s390x.debug’ (default) Adding #2: IPL section ‘linux’ Preparing boot device: dasdb. Done.