exit_null 306 arch/s390/include/asm/kvm_host.h u64 exit_null; exit_null 64 arch/s390/kvm/kvm-s390.c { "exit_null", VCPU_STAT(exit_null) }, exit_null 3810 arch/s390/kvm/kvm-s390.c vcpu->stat.exit_null++;