> I always make mrproper after applying your patches, and I still got exactly
the
> same problem with nfs that Marek found.  There were no errors or warnings
during
> the compile of the objects in the fs/nfs directory or the linking of nfs.o.
>
Curious : my build has

#define __ver_filemap_fdatasync    f18ce7a1
#define filemap_fdatasync     _set_ver(filemap_fdatasync)
#define __ver_filemap_fdatawait    d4250148
#define filemap_fdatawait     _set_ver(filemap_fdatawait)

in modules/filemap.ver

I'll have a look