xfs: remove if_lastex

The if_lastex field in struct xfs_ifork is only used as a temporary
index during xfs_bmapi and xfs_bunmapi.  Instead of using the inode
fork to store it keep it local in the callchain.  Fortunately this
is very easy as we already pass a stack copy of it down the whole
chain which can simplify be changed to be passed by reference.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alex Elder <aelder@sgi.com>

1 files changed, 0 insertions, 2 deletions

diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index da46c0f55038..c96bdeda23bb 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -920,7 +920,6 @@ xfs_iread_extents(
         /*
          * We know that the size is valid (it's checked in iformat_btree)
          */
-        ifp->if_lastex = NULLEXTNUM;
         ifp->if_bytes = ifp->if_real_bytes = 0;
         ifp->if_flags |= XFS_IFEXTENTS;
         xfs_iext_add(ifp, 0, nextents);
@@ -3191,7 +3190,6 @@ xfs_iext_add(
                 }
                 ifp->if_u1.if_extents = ifp->if_u2.if_inline_ext;
                 ifp->if_real_bytes = 0;
-                ifp->if_lastex = nextents + ext_diff;
         }
         /*
          * Otherwise use a linear (direct) extent list.