unsigned volatile long Vs volatile unsigned long

Question

I came across a code today where a particular hardware address was type casted to

unsigned volatile long * 

I know it can be volatile unsigned long or unsigned long volatile; is this another way of defining volatile or it is a bug in the code ?

I enabled warnings and surprised to see no warning. I was using GCC-4.7.0

Answer 1

It's just another way, there's no semantic difference.