cr0_old 50 arch/s390/kernel/ptrace.c union ctlreg0 cr0_old, cr0_new; cr0_old 54 arch/s390/kernel/ptrace.c __ctl_store(cr0_old.val, 0, 0); cr0_old 56 arch/s390/kernel/ptrace.c cr0_new = cr0_old; cr0_old 80 arch/s390/kernel/ptrace.c cr0_changed = cr0_new.val != cr0_old.val;