early console in setup code

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BUG: kernel early-boot crashed early console in setup code
Linux version 4.1.0-03324-g4066c33 #5
Command line: hung_task_panic=1 earlyprintk=ttyS0,115200 systemd.log_level=err debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal  root=/dev/ram0 rw link=/kbuild-tests/run-queue/kvm/i386-randconfig-sb0-08051454/linux-devel:devel-spot-201508051145:4066c33d0308f87e9a3b0c7fafb9141c0bfbfa77:bisect-linux-5/.vmlinuz-4066c33d0308f87e9a3b0c7fafb9141c0bfbfa77-20150808052740-53-ivb41 branch=linux-devel/devel-spot-201508051145 BOOT_IMAGE=/pkg/linux/i386-randconfig-sb0-08051454/gcc-4.9/4066c33d0308f87e9a3b0c7fafb9141c0bfbfa77/vmlinuz-4.1.0-03324-g4066c33 drbd.minor_count=8
qemu-system-x86_64 -enable-kvm -cpu kvm64 -kernel /pkg/linux/i386-randconfig-sb0-08051454/gcc-4.9/4066c33d0308f87e9a3b0c7fafb9141c0bfbfa77/vmlinuz-4.1.0-03324-g4066c33 -append 'hung_task_panic=1 earlyprintk=ttyS0,115200 systemd.log_level=err debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0 console=ttyS0,115200 console=tty0 vga=normal  root=/dev/ram0 rw link=/kbuild-tests/run-queue/kvm/i386-randconfig-sb0-08051454/linux-devel:devel-spot-201508051145:4066c33d0308f87e9a3b0c7fafb9141c0bfbfa77:bisect-linux-5/.vmlinuz-4066c33d0308f87e9a3b0c7fafb9141c0bfbfa77-20150808052740-53-ivb41 branch=linux-devel/devel-spot-201508051145 BOOT_IMAGE=/pkg/linux/i386-randconfig-sb0-08051454/gcc-4.9/4066c33d0308f87e9a3b0c7fafb9141c0bfbfa77/vmlinuz-4.1.0-03324-g4066c33 drbd.minor_count=8'  -initrd /osimage/quantal/quantal-core-i386.cgz -m 300 -smp 2 -device e1000,netdev=net0 -netdev user,id=net0 -boot order=nc -no-reboot -watchdog i6300esb -rtc base=localtime -drive file=/fs/sda5/disk0-quantal-ivb41-22,media=disk,if=virtio -drive file=/fs/sda5/disk1-quantal-ivb41-22,media=disk,if=virtio -drive file=/fs/sda5/disk2-quantal-ivb41-22,media=disk,if=virtio -drive file=/fs/sda5/disk3-quantal-ivb41-22,media=disk,if=virtio -drive file=/fs/sda5/disk4-quantal-ivb41-22,media=disk,if=virtio -drive file=/fs/sda5/disk5-quantal-ivb41-22,media=disk,if=virtio -drive file=/fs/sda5/disk6-quantal-ivb41-22,media=disk,if=virtio -pidfile /dev/shm/kboot/pid-quantal-ivb41-22 -serial file:/dev/shm/kboot/serial-quantal-ivb41-22 -daemonize -display none -monitor null