$ fastboot flash kernel-4-4 arch/arm/boot/uImage
< waiting for device >
$ fastboot devices
no permissions fastboot
$ sudo chown root:root /usr/bin/fastboot
$ sudo chmod +s /usr/bin/fastboot
$ fastboot devices
SMDKEXYNOS- fastboot
$ fastboot flash dtb arch/arm/boot/dts/exynos4412-tiny4412.dtb
Sending 'dtb' (47 KB) OKAY [ 0.018s]
Writing 'dtb' OKAY [ 0.395s]
Finished. Total time: 0.439s
$ fastboot flash kernel-4-4 arch/arm/boot/uImage
Sending 'kernel-4-4' (3564 KB) OKAY [ 0.642s]
Writing 'kernel-4-4' OKAY [ 0.429s]
Finished. Total time: 1.087s