Mike's patch has a number of problems, which is why it will not be
included in the GCC development sources in its current form.  One does not
need all of that to provide a -mlongcall commandline option anyway -- its
overkill.  Just look for the current places checking the longcall
attribute and add a target flag test as well.

	On the other hand, as has been mentioned, it would be more
efficient to decorate the few prototypes for base kernel services that
need to be called this way than to compile the entire LKM using pointer
calls. 

David