Device loading warning!!!

Hello,

I'm using the following environment for testing the driver for my PCI card

Linux : RedHat Linux 7.3
glibc : glibc-2.2.5-34
gcc : gcc-2.96-110
RAM : 256MB

I reserve 200MB space for the kernel by making an entry in lilo.conf
follows  
append="mem=200m"
& use the rest of the RAM space for my device buffers


Load the driver using "insmod test.o OFFSET=0xFDFF000"
The driver is loaded successfully but it gives the following warning

# /sbin/insmod test.o OFFSET=0xFDFF000 MAJOR=201
Warning: loading test.o will taint the kernel: no license

# /sbin/lsmod
Module                  Size  Used by    Tainted: P
test		           10252   0  (unused)
autofs                 12164   0  (autoclean) (unused)
eepro100               20336   1
ide-cd                 30272   0  (autoclean)
cdrom                  32192   0  (autoclean) [ide-cd]
usb-uhci               24484   0  (unused)
usbcore                73152   1  [usb-uhci]
ext3                   67136   2
jbd                    49400   2  [ext3]

What is the cause of the warning?

warm regards


Manoj