[PATCH 1/2] types.h: implement intptr_t and uintptr_t

[Christoph Hellwig]

I'd really like to get Jans type cleanups in XFS in for the next
merge window.  Given the lack of feedback on lkml in favor or
against (u)intptr_t I'm tempted to add them to xfs_linux.h for now,
and then do another push to propagate them to kernel-wide types later.

Is that fine with everybody?