df: add -a
df: don't special case rootfs and /dev/root

function                                             old     new   delta
df_main                                              746     684     -62
find_block_device                                    111       -    -111
find_block_device_in_dir                             243       -    -243
------------------------------------------------------------------------------
(add/remove: 0/2 grow/shrink: 0/1 up/down: 0/-416)           Total: -416 bytes

1 file changed