vmlinux object size
(delta in bytes from test_v4.15-rc1 (4fbd8d194f06c8a3fd2af1ce560ddb31f7ec8323)):
   text     data      bss    total  kernel
  +3004     -376        0    +2628  multi_v7_defconfig
  +3116     -320        0    +2796  tegra_defconfig