[XFS] cleanup btree record / key / ptr addressing macros.

Replace the generic record / key / ptr addressing macros that use cpp
token pasting with simpler macros that do the job for just one given btree
type. The new macros lose the cur argument and thus can be used outside
the core btree code, but also gain an xfs_mount * argument to allow for
checking the CRC flag in the near future. Note that many of these macros
aren't actually used in the kernel code, but only in userspace (mostly in
xfs_repair).

SGI-PV: 988146

SGI-Modid: xfs-linux-melb:xfs-kern:32295a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Donald Douwsma <donaldd@sgi.com>
Signed-off-by: David Chinner <david@fromorbit.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>

1 files changed, 18 insertions, 7 deletions

diff --git a/fs/xfs/xfs_alloc_btree.h b/fs/xfs/xfs_alloc_btree.h
index ff1f71d069c4..579f9c7e0872 100644
--- a/fs/xfs/xfs_alloc_btree.h
+++ b/fs/xfs/xfs_alloc_btree.h
@@ -78,16 +78,27 @@ typedef	struct xfs_btree_sblock xfs_alloc_block_t;
 
 /*
  * Record, key, and pointer address macros for btree blocks.
+ *
+ * (note that some of these may appear unused, but they are used in userspace)
  */
-#define XFS_ALLOC_REC_ADDR(bb,i,cur)    \
-        XFS_BTREE_REC_ADDR(xfs_alloc, bb, i)
-
-#define XFS_ALLOC_KEY_ADDR(bb,i,cur)    \
-        XFS_BTREE_KEY_ADDR(xfs_alloc, bb, i)
+#define XFS_ALLOC_REC_ADDR(mp, block, index) \
+        ((xfs_alloc_rec_t *) \
+                ((char *)(block) + \
+                 sizeof(struct xfs_btree_sblock) + \
+                 (((index) - 1) * sizeof(xfs_alloc_rec_t))))
 
-#define XFS_ALLOC_PTR_ADDR(bb,i,cur)    \
-        XFS_BTREE_PTR_ADDR(xfs_alloc, bb, i, XFS_ALLOC_BLOCK_MAXRECS(1, cur))
+#define XFS_ALLOC_KEY_ADDR(mp, block, index) \
+        ((xfs_alloc_key_t *) \
+                ((char *)(block) + \
+                 sizeof(struct xfs_btree_sblock) + \
+                 ((index) - 1) * sizeof(xfs_alloc_key_t)))
 
+#define XFS_ALLOC_PTR_ADDR(mp, block, index, maxrecs) \
+        ((xfs_alloc_ptr_t *) \
+                ((char *)(block) + \
+                 sizeof(struct xfs_btree_sblock) + \
+                 (maxrecs) * sizeof(xfs_alloc_key_t) + \
+                 ((index) - 1) * sizeof(xfs_alloc_ptr_t)))
 
 extern struct xfs_btree_cur *xfs_allocbt_init_cursor(struct xfs_mount *,
                 struct xfs_trans *, struct xfs_buf *,