[XFS] fix compile of xfs_btree_readahead_lblock on m68k

Change the left/right variables to the proper always 64bit xfs_dfsbo_t
type because otherwise compilation fails for Geert on m68k without
CONFIG_LBD:

| fs/xfs/xfs_btree.c: In function 'xfs_btree_readahead_lblock':
| fs/xfs/xfs_btree.c:736: warning: comparison is always true due to limited range of data type
| fs/xfs/xfs_btree.c:741: warning: comparison is always true due to limited range of data type

Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/fs/xfs/xfs_btree.c b/fs/xfs/xfs_btree.c
index 7ed59267420d..2c3ef20f8842 100644
--- a/fs/xfs/xfs_btree.c
+++ b/fs/xfs/xfs_btree.c
@@ -730,8 +730,8 @@ xfs_btree_readahead_lblock(
         struct xfs_btree_block  *block)
 {
         int                     rval = 0;
-        xfs_fsblock_t           left = be64_to_cpu(block->bb_u.l.bb_leftsib);
-        xfs_fsblock_t           right = be64_to_cpu(block->bb_u.l.bb_rightsib);
+        xfs_dfsbno_t            left = be64_to_cpu(block->bb_u.l.bb_leftsib);
+        xfs_dfsbno_t            right = be64_to_cpu(block->bb_u.l.bb_rightsib);
 
         if ((lr & XFS_BTCUR_LEFTRA) && left != NULLDFSBNO) {
                 xfs_btree_reada_bufl(cur->bc_mp, left, 1);