Error inserting module : unknown symbol _udivdi3 undefined

This error occurs on 32 bit operating system. This won't come if you are using 64 bit operating system. If you wan't to avoid this error in 32 bit operating system then you will have to do following thing.

In your code wherever you are doing division by using "/" operator replace it by following
uint32_t do_div(uint64_t dividend, uint32_t divisor)


So a/b would be do_div(a/b).