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authorChristian Borntraeger <borntraeger@de.ibm.com>2017-11-21 16:02:52 +0100
committerChristian Borntraeger <borntraeger@de.ibm.com>2017-12-06 09:18:43 +0100
commitbb64da9aba89765fee74b395967b18a7d6c364e9 (patch)
treec3499d7eaece67a6be01d01490c78b7ffe875e89 /include
parent940f89a5a37789b94f332755767c556a64b004e4 (diff)
downloadlinux-bb64da9aba89765fee74b395967b18a7d6c364e9.tar.bz2
KVM: s390: mark irq_state.flags as non-usable
Old kernels did not check for zero in the irq_state.flags field and old QEMUs did not zero the flag/reserved fields when calling KVM_S390_*_IRQ_STATE. Let's add comments to prevent future uses of these fields. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'include')
-rw-r--r--include/uapi/linux/kvm.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index 282d7613fce8..496e59a2738b 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -630,9 +630,9 @@ struct kvm_s390_irq {
struct kvm_s390_irq_state {
__u64 buf;
- __u32 flags;
+ __u32 flags; /* will stay unused for compatibility reasons */
__u32 len;
- __u32 reserved[4];
+ __u32 reserved[4]; /* will stay unused for compatibility reasons */
};
/* for KVM_SET_GUEST_DEBUG */