To get the LINUX_VERSION_CODE macro (when building yaffs as a module) I 
needed to apply the following trivial patch.  I think yportenv is the 
correct place to put it.

Cheers
Brad

Index: yportenv.h
===================================================================
RCS file: /home/aleph1/cvs/yaffs/yportenv.h,v
retrieving revision 1.11
diff -r1.11 yportenv.h
38a39
 > #include "linux/version.h"