DataCache is used to store data temporarily, then the data will be written to
vmcore. These functions will be called later when writing data of page to
vmcore.
Signed-off-by: NQiao Nuohan <qiaonuohan@cn.fujitsu.com>
Reviewed-by: NLaszlo Ersek <lersek@redhat.com>
Signed-off-by: NLuiz Capitulino <lcapitulino@redhat.com>