os_info_old_entry
void *os_info_old_entry(int nr, unsigned long *size);
return (unsigned long)os_info_old_entry(nr, &size);
vmcoreinfo = os_info_old_entry(OS_INFO_VMCOREINFO, &size);
vmcoreinfo = os_info_old_entry(OS_INFO_VMCOREINFO, &size);
reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);