[BusyBox] df with post 2.4.18 kernels

[Jacques Nilo]

The ouput of df (busybox 0.63) for a LEAF "Bering" distro with a 2.4.20 
kernel gives:
# df
Filesystem           1k-blocks      Used Available Use% Mounted on
rootfs                    6144      4916      1228  80% /
/dev/root                 6144      4916      1228  80% /
tmpfs                    15288       164     15124   1% /tmp
tmpfs                     2048       192      1856   9% /var/log

The corresponding /proc/mounts is:
# cat /proc/mounts
rootfs / rootfs rw 0 0
/dev/root / tmpfs rw 0 0
/proc /proc proc rw 0 0
tmpfs /tmp tmpfs rw 0 0
tmpfs /var/log tmpfs rw 0 0

The ouput of df (busybox 0.63) for the same distro with a 2.4.18 kernel gives:
# df
Filesystem           1k-blocks      Used Available Use% Mounted on
/dev/root                 6144      4916      1228  80% /
tmpfs                    15288       164     15124   1% /tmp
tmpfs                     2048       192      1856   9% /var/log

The corresponding /proc/mounts is:
# cat /proc/mounts
/dev/root / tmpfs rw 0 0
/proc /proc proc rw 0 0
tmpfs /tmp tmpfs rw 0 0
tmpfs /var/log tmpfs rw 0 0

The reason is that apparently A. Viro decided to show rootfs in /proc/mounts 
startting with the 2.4.19 kernel. The thread is here:
http://www.uwsg.iu.edu/hypermail/linux/kernel/0204.3/0290.html

Any fix/patch planned for df wich could work for all types of 2.4 kernels ?

Thanks

Jacques