xfs: remove iomap_delta

The iomap_delta field in struct xfs_iomap just contains the
difference between the offset passed to xfs_iomap and the
iomap_offset.  Just calculate it in the only caller that cares.

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

diff --git a/fs/xfs/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c
index 49dec21..577d0b4 100644 (file)
--- a/fs/xfs/linux-2.6/xfs_aops.c
+++ b/fs/xfs/linux-2.6/xfs_aops.c
@@ -1512,9 +1512,11 @@ __xfs_get_blocks(
        }
 
        if (direct || size > (1 << inode->i_blkbits)) {
-               ASSERT(iomap.iomap_bsize - iomap.iomap_delta > 0);
+               xfs_off_t iomap_delta = offset - iomap.iomap_offset;
+
+               ASSERT(iomap.iomap_bsize - iomap_delta > 0);
                offset = min_t(xfs_off_t,
-                               iomap.iomap_bsize - iomap.iomap_delta, size);
+                               iomap.iomap_bsize - iomap_delta, size);
                bh_result->b_size = (ssize_t)min_t(xfs_off_t, LONG_MAX, offset);
        }
 

diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c
index 7327d3f..c6b409e 100644 (file)
--- a/fs/xfs/xfs_iomap.c
+++ b/fs/xfs/xfs_iomap.c
@@ -68,7 +68,6 @@ xfs_imap_to_bmap(
        xfs_fsblock_t   start_block;
 
        iomapp->iomap_offset = XFS_FSB_TO_B(mp, imap->br_startoff);
-       iomapp->iomap_delta = offset - iomapp->iomap_offset;
        iomapp->iomap_bsize = XFS_FSB_TO_B(mp, imap->br_blockcount);
        iomapp->iomap_flags = flags;
 

diff --git a/fs/xfs/xfs_iomap.h b/fs/xfs/xfs_iomap.h
index a85fa90..db92996 100644 (file)
--- a/fs/xfs/xfs_iomap.h
+++ b/fs/xfs/xfs_iomap.h
@@ -72,7 +72,6 @@ typedef struct xfs_iomap {
        xfs_daddr_t             iomap_bn;       /* first 512B blk of mapping */
        xfs_off_t               iomap_offset;   /* offset of mapping, bytes */
        xfs_off_t               iomap_bsize;    /* size of mapping, bytes */
-       xfs_off_t               iomap_delta;    /* offset into mapping, bytes */
        iomap_flags_t           iomap_flags;
 } xfs_iomap_t;