Stable team, here is a backport for 4.19 of commit a3e03bc1368 ("KVM: s390: index kvm->arch.idle_mask by vcpu_idx") This basically removes the kick_mask parts that were introduced with kernel 5.0 and fixes up the location of the idle_mask to the older place. FWIW, it might be a good idea to also backport 8750e72a79dd ("KVM: remember position in kvm->vcpus array") to avoid a performance regression for large guests (many vCPUs) when this patch is applied. @Paolo Bonzini, would you be ok with 8750e72a79dd in older stable releases? Halil Pasic (1): KVM: s390: index kvm->arch.idle_mask by vcpu_idx arch/s390/kvm/interrupt.c | 4 ++-- arch/s390/kvm/kvm-s390.h | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-) -- 2.31.1