PGSHIFT vs. PAGE_SHIFT

["Cherry G. Mathew" <cherry%sdf.lonestar.org@localhost>]

Hi,

Is this part of history, or is there some legitimate reason why we
need these similar sets of #defines and dependant macros ?

Does it do any harm to base one on the other ?
(eg: #define PGSHIFT PAGE_SHIFT)

If so, which would best depend on the other, and why ?

Thanks,
--
~Cherry