I noticed when building with CONFIG_SWAP=n that tlb.h gave a warning about
some undefined symbols.  This is because it was pulling them in through
swap.h, but when CONFIG_SWAP=n, they're no longer pulled in.  Adding
pagemap.h to tlb.h fixes the problem.
Signed-off-by: Jesse Barnes <jbarnes@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>