ah found one. This was for one instance of where mach was used. It
basically says if mach is used in a function, put a declaration of m at the
start of the function.
@mr exists@
typedef Mach; // only needed once per semantic patch
idexpression Mach *m;
function f;
position p;
identifier d;
@@
we used the coccinnelle tool (spatch) to convert about 1.4M lines of Plan 9
code to C11 for harvey. It was not perfect, but it did get a lot right.
This even got pretty complex: in amd64 Plan 9, r14 and r15 are dedicated to
up and mach.
This is not portable, so we wanted to make it explicit. So
