Kbuild Manual Usage make clean make defconfig make ./vmlinux Output: Iterate over RBTree. 0x1 0x2 0x3 0x4 0x5 0x7 0x8 0x9 0x129 Iterate over by postorder. 0x1 0x3 0x2 0x5 0x8 0x129 0x9 0x7 0x4