KVM: s390: mark irq_state.flags as non-usable

[mirror_ubuntu-jammy-kernel.git] / arch / s390 / kvm / kvm-s390.c

diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 98ad8b9e036093c8a784cfc0dfd3887e925c6357..efa439f6ffb39302ed23cb03e5f87138eb4cc673 100644 (file)
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -1,11 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
- * hosting zSeries kernel virtual machines
+ * hosting IBM Z kernel virtual machines (s390x)
  *
- * Copyright IBM Corp. 2008, 2009
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License (version 2 only)
- * as published by the Free Software Foundation.
+ * Copyright IBM Corp. 2008, 2017
  *
  *    Author(s): Carsten Otte <cotte@de.ibm.com>
  *               Christian Borntraeger <borntraeger@de.ibm.com>
@@ -3811,6 +3808,7 @@ long kvm_arch_vcpu_ioctl(struct file *filp,
                        r = -EINVAL;
                        break;
                }
+               /* do not use irq_state.flags, it will break old QEMUs */
                r = kvm_s390_set_irq_state(vcpu,
                                           (void __user *) irq_state.buf,
                                           irq_state.len);
@@ -3826,6 +3824,7 @@ long kvm_arch_vcpu_ioctl(struct file *filp,
                        r = -EINVAL;
                        break;
                }
+               /* do not use irq_state.flags, it will break old QEMUs */
                r = kvm_s390_get_irq_state(vcpu,
                                           (__u8 __user *)  irq_state.buf,
                                           irq_state.len);