> Will using the compiler flag *just* when compiling the source for the
> individual module in question fix this problem, or will the LKM
> architecture within the kernel need to be compiled with that flag as
> well?

Well, try a test. Compile up a decent-sized file with and without all of
its internal prototypes marked __longcall__. See if the assembly is any
different.

AFAIK the only differences should be in how the functions call each other,
if at all -- usually the compiler only does the __longcall__ magic for calls
to subroutines outside the current translation unit.

Assuming that's true, then the prototype mismatch you see is almost certainly
a red herring, and is just the compiler being pedantic for portability reasons
(on some ports -- like i386 -- it may indeed have serious consequences).

Todd Whitesel
toddpw @ best.com