Fix rootfs mount and unmount

Author: gsingh93

Makefile

@@ -265,12 +265,13 @@ rootfs: ext4
 .PHONY: rootfs-mount
 rootfs-mount:
 	sudo modprobe nbd
-	sudo qemu-nbd -c /dev/nbd0 --read-only $(ROOTFS_IMG)
-	sudo udisksctl mount -b /dev/nbd0
+	sudo qemu-nbd -c /dev/nbd0 $(ROOTFS)
+	mkdir -p /tmp/rootfs
+	sudo mount /dev/nbd0 /tmp/rootfs
 
 .PHONY: rootfs-unmount
 rootfs-unmount:
-	sudo udisksctl unmount -b /dev/nbd0
+	sudo umount /dev/nbd0
 	sudo qemu-nbd -d /dev/nbd0
 
 .PHONY: rootfs_clean