Latest commit bb64da9 Nov 21, 2017 @borntraeger borntraeger 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 <>
Reviewed-by: Thomas Huth <>
Reviewed-by: Cornelia Huck <>
Reviewed-by: David Hildenbrand <>
Signed-off-by: Christian Borntraeger <>