[XFS] (mostly) remove xfs_inval_cached_pages  Since the last round of
direct I/O locking changes it is just a wrapper around
VOP_FLUSHINVAL_PAGES, so it's not nessecary anymore.  Keep a simplified
version for kernels < 2.4.22, as these don't have the changed direct I/O
locking.

SGI-PV: 938064
SGI-Modid: xfs-linux:xfs-kern:194420a

Signed-off-by: Christoph Hellwig <[email protected]>
Signed-off-by: Nathan Scott <[email protected]>
4 files changed