Give Distinct Label to The Partition Containing Root File
e2label /dev/sda1 ROOTFS
#modify the usb_init parameter to use ROOTFS label
#all one line, the rw at the end is important
fw_setenv usb_init "run usb_scan; setenv usb_root LABEL=ROOTFS rw"
#create the required initial ramdisk
pacman -Sy uboot-mkimage
mkinitcpio -v -g /boot/kernel.img
#all one line
mkimage -A arm -O linux -T ramdisk -C gzip -a 0x00000000 -e 0x00000000 -n initramfs -d /boot/kernel.img /boot/uInitrd