type qualifier (defined by the
C99) for kernel arguments (pointers) in the kernel signature. You can
qualifier only with kernel arguments. The
qualifier is a hint to the compiler that helps to limit the effects of
pointer aliasing, while also aiding caching optimizations. In the example
below, it enables the compiler to assume that pointers
point to the different locations. You
must ensure that the pointers do not point to overlapping locations.