xfs: avoid harmless gcc-7 warnings

gcc-7 flags the use of integer math inside of a condition
as a potential bug:

fs/xfs/xfs_bmap_util.c: In function 'xfs_swap_extents_check_format':
fs/xfs/xfs_bmap_util.c:1619:8: error: '<<' in boolean context, did you mean '<' ? [-Werror=int-in-bool-context]
fs/xfs/xfs_bmap_util.c:1629:8: error: '<<' in boolean context, did you mean '<' ? [-Werror=int-in-bool-context]

There is already a helper function for testing the di_forkoff
field for zero, so let's use that instead to shut up the warning.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>

diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c
index 9e3cc2146d5b03cdc84a4a0d92ce3c186314525d..7493a64f5b998e6dc21ba39fcdfee8b5dbcf451a 100644 (file)
--- a/fs/xfs/xfs_bmap_util.c
+++ b/fs/xfs/xfs_bmap_util.c
@@ -1617,7 +1617,7 @@ xfs_swap_extents_check_format(
         * extent format...
         */
        if (tip->i_d.di_format == XFS_DINODE_FMT_BTREE) {
-               if (XFS_IFORK_BOFF(ip) &&
+               if (XFS_IFORK_Q(ip) &&
                    XFS_BMAP_BMDR_SPACE(tip->i_df.if_broot) > XFS_IFORK_BOFF(ip))
                        return -EINVAL;
                if (XFS_IFORK_NEXTENTS(tip, XFS_DATA_FORK) <=
@@ -1627,7 +1627,7 @@ xfs_swap_extents_check_format(
 
        /* Reciprocal target->temp btree format checks */
        if (ip->i_d.di_format == XFS_DINODE_FMT_BTREE) {
-               if (XFS_IFORK_BOFF(tip) &&
+               if (XFS_IFORK_Q(tip) &&
                    XFS_BMAP_BMDR_SPACE(ip->i_df.if_broot) > XFS_IFORK_BOFF(tip))
                        return -EINVAL;
                if (XFS_IFORK_NEXTENTS(ip, XFS_DATA_FORK) <=