[XFS] Remove the BPCSHIFT and NB* based macros from XFS.

The BPCSHIFT based macros, btoc*, ctob*, offtoc* and ctooff are either not
used or don't need to be used. The NDPP, NDPP, NBBY macros don't need to
be used but instead are replaced directly by PAGE_SIZE and PAGE_CACHE_SIZE
where appropriate. Initial patch and motivation from Nicolas Kaiser.

SGI-PV: 971186
SGI-Modid: xfs-linux-melb:xfs-kern:30096a

Signed-off-by: Tim Shimmin <tes@sgi.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>

1 files changed, 4 insertions, 5 deletions

diff --git a/fs/xfs/linux-2.6/xfs_lrw.c b/fs/xfs/linux-2.6/xfs_lrw.c
index 19a1f077dbd6..6c3a846a5267 100644
--- a/fs/xfs/linux-2.6/xfs_lrw.c
+++ b/fs/xfs/linux-2.6/xfs_lrw.c
@@ -243,9 +243,8 @@ xfs_read(
 
         if (unlikely(ioflags & IO_ISDIRECT)) {
                 if (VN_CACHED(vp))
-                        ret = xfs_flushinval_pages(ip,
-                                        ctooff(offtoct(*offset)),
-                                        -1, FI_REMAPF_LOCKED);
+                        ret = xfs_flushinval_pages(ip, (*offset & PAGE_CACHE_MASK),
+                                                    -1, FI_REMAPF_LOCKED);
                 mutex_unlock(&inode->i_mutex);
                 if (ret) {
                         xfs_iunlock(ip, XFS_IOLOCK_SHARED);
@@ -731,9 +730,9 @@ retry:
                 if (VN_CACHED(vp)) {
                         WARN_ON(need_i_mutex == 0);
                         xfs_inval_cached_trace(xip, pos, -1,
-                                        ctooff(offtoct(pos)), -1);
+                                        (pos & PAGE_CACHE_MASK), -1);
                         error = xfs_flushinval_pages(xip,
-                                        ctooff(offtoct(pos)),
+                                        (pos & PAGE_CACHE_MASK),
                                         -1, FI_REMAPF_LOCKED);
                         if (error)
                                 goto out_unlock_internal;