Mainline Kernel on Odroid-U3

$ wget https://www.kernel.org/
$ tar -xf linux-*
$ cd linux-*

$ cp /boot/config* .config
$ yes "" | make oldconfig
or
$ make exynos_defconfig

$ make -j 4 zImage modules dtbs
$ sudo cp arch/arm/boot/zImage arch/arm/boot/dts/*.dtb /media/boot
$ sudo make modules_install
$ sudo make firmware_install
$ sudo make headers_install INSTALL_HDR_PATH=/usr
$ kver=`make kernelrelease`
$ sudo cp .config /boot/config-${kver}
$ cd /boot
$ sudo update-initramfs -c -k ${kver}
$ sudo mkimage -A arm -O linux -T ramdisk -a 0x0 -e 0x0 -n initrd.img-${kver} -d initrd.img-${kver} uInitrd-${kver}
$ sudo cp uInitrd-${kver} /media/boot/uInitrd
$ reboot