xfs: remove all *_ITER_CONTINUE values

Iterator functions already use 0 to signal "continue iterating", so get
rid of the #defines and just do it directly.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>

fs/xfs/libxfs/xfs_btree.h

@@ -471,7 +471,6 @@ unsigned long long xfs_btree_calc_size(uint *limits, unsigned long long len);
  * used to stop iteration, because _query_range never generates that error
  * code on its own.
  */
-#define XFS_BTREE_QUERY_RANGE_CONTINUE	(XFS_ITER_CONTINUE) /* keep iterating */
 typedef int (*xfs_btree_query_range_fn)(struct xfs_btree_cur *cur,
 		union xfs_btree_rec *rec, void *priv);
 

fs/xfs/libxfs/xfs_rmap.c

@@ -253,11 +253,11 @@ xfs_rmap_find_left_neighbor_helper(
 			rec->rm_flags);
 
 	if (rec->rm_owner != info->high.rm_owner)
-		return XFS_BTREE_QUERY_RANGE_CONTINUE;
+		return 0;
 	if (!XFS_RMAP_NON_INODE_OWNER(rec->rm_owner) &&
 	    !(rec->rm_flags & XFS_RMAP_BMBT_BLOCK) &&
 	    rec->rm_offset + rec->rm_blockcount - 1 != info->high.rm_offset)
-		return XFS_BTREE_QUERY_RANGE_CONTINUE;
+		return 0;
 
 	*info->irec = *rec;
 	*info->stat = 1;
@@ -329,12 +329,12 @@ xfs_rmap_lookup_le_range_helper(
 			rec->rm_flags);
 
 	if (rec->rm_owner != info->high.rm_owner)
-		return XFS_BTREE_QUERY_RANGE_CONTINUE;
+		return 0;
 	if (!XFS_RMAP_NON_INODE_OWNER(rec->rm_owner) &&
 	    !(rec->rm_flags & XFS_RMAP_BMBT_BLOCK) &&
 	    (rec->rm_offset > info->high.rm_offset ||
 	     rec->rm_offset + rec->rm_blockcount <= info->high.rm_offset))
-		return XFS_BTREE_QUERY_RANGE_CONTINUE;
+		return 0;
 
 	*info->irec = *rec;
 	*info->stat = 1;

fs/xfs/libxfs/xfs_shared.h

@@ -177,7 +177,4 @@ struct xfs_ino_geometry {
 	unsigned int	agino_log;	/* #bits for agino in inum */
 };
 
-/* Keep iterating the data structure. */
-#define XFS_ITER_CONTINUE	(0)
-
 #endif /* __XFS_SHARED_H__ */

fs/xfs/xfs_fsmap.c

@@ -250,7 +250,7 @@ xfs_getfsmap_helper(
 		rec_daddr += XFS_FSB_TO_BB(mp, rec->rm_blockcount);
 		if (info->next_daddr < rec_daddr)
 			info->next_daddr = rec_daddr;
-		return XFS_BTREE_QUERY_RANGE_CONTINUE;
+		return 0;
 	}
 
 	/* Are we just counting mappings? */
@@ -259,14 +259,14 @@ xfs_getfsmap_helper(
 			info->head->fmh_entries++;
 
 		if (info->last)
-			return XFS_BTREE_QUERY_RANGE_CONTINUE;
+			return 0;
 
 		info->head->fmh_entries++;
 
 		rec_daddr += XFS_FSB_TO_BB(mp, rec->rm_blockcount);
 		if (info->next_daddr < rec_daddr)
 			info->next_daddr = rec_daddr;
-		return XFS_BTREE_QUERY_RANGE_CONTINUE;
+		return 0;
 	}
 
 	/*
@@ -328,7 +328,7 @@ out:
 	rec_daddr += XFS_FSB_TO_BB(mp, rec->rm_blockcount);
 	if (info->next_daddr < rec_daddr)
 		info->next_daddr = rec_daddr;
-	return XFS_BTREE_QUERY_RANGE_CONTINUE;
+	return 0;
 }
 
 /* Transform a rmapbt irec into a fsmap */

fs/xfs/xfs_iwalk.h

@@ -17,8 +17,6 @@
 /* Walk all inodes in the filesystem starting from @startino. */
 typedef int (*xfs_iwalk_fn)(struct xfs_mount *mp, struct xfs_trans *tp,
 			    xfs_ino_t ino, void *data);
-/* Return values for xfs_iwalk_fn. */
-#define XFS_IWALK_CONTINUE	(XFS_ITER_CONTINUE)
 
 int xfs_iwalk(struct xfs_mount *mp, struct xfs_trans *tp, xfs_ino_t startino,
 		unsigned int flags, xfs_iwalk_fn iwalk_fn,