[PATCH 01/26] kill struct xfs_btree_hdr

[Christoph Hellwig <hch@xxxxxx>]

This type is only embedded in struct xfs_btree_block and never used
directly.  By moving the fields directly into struct xfs_btree_block
a lot of the macros for struct xfs_btree_sblock and struct xfs_btree_lblock
can be used for struct xfs_btree_block too now which helps greatly
with some of the migrations during implementing the generic btree code.


Signed-off-by: Christoph Hellwig <hch@xxxxxx>

Index: linux-2.6-xfs/fs/xfs/xfs_btree.c
===================================================================
--- linux-2.6-xfs.orig/fs/xfs/xfs_btree.c       2008-08-02 04:01:21.000000000 
+0200
+++ linux-2.6-xfs/fs/xfs/xfs_btree.c    2008-08-02 04:04:22.000000000 +0200
@@ -62,13 +62,13 @@ xfs_btree_maxrecs(
        case XFS_BTNUM_BNO:
        case XFS_BTNUM_CNT:
                return (int)XFS_ALLOC_BLOCK_MAXRECS(
-                               be16_to_cpu(block->bb_h.bb_level), cur);
+                               be16_to_cpu(block->bb_level), cur);
        case XFS_BTNUM_BMAP:
                return (int)XFS_BMAP_BLOCK_IMAXRECS(
-                               be16_to_cpu(block->bb_h.bb_level), cur);
+                               be16_to_cpu(block->bb_level), cur);
        case XFS_BTNUM_INO:
                return (int)XFS_INOBT_BLOCK_MAXRECS(
-                               be16_to_cpu(block->bb_h.bb_level), cur);
+                               be16_to_cpu(block->bb_level), cur);
        default:
                ASSERT(0);
                return 0;
@@ -634,7 +634,7 @@ xfs_btree_firstrec(
        /*
         * It's empty, there is no such record.
         */
-       if (!block->bb_h.bb_numrecs)
+       if (!block->bb_numrecs)
                return 0;
        /*
         * Set the ptr value to 1, that's the first record/key.
@@ -663,12 +663,12 @@ xfs_btree_lastrec(
        /*
         * It's empty, there is no such record.
         */
-       if (!block->bb_h.bb_numrecs)
+       if (!block->bb_numrecs)
                return 0;
        /*
         * Set the ptr value to numrecs, that's the last record/key.
         */
-       cur->bc_ptrs[level] = be16_to_cpu(block->bb_h.bb_numrecs);
+       cur->bc_ptrs[level] = be16_to_cpu(block->bb_numrecs);
        return 1;
 }
 
Index: linux-2.6-xfs/fs/xfs/xfs_btree.h
===================================================================
--- linux-2.6-xfs.orig/fs/xfs/xfs_btree.h       2008-08-02 04:00:28.000000000 
+0200
+++ linux-2.6-xfs/fs/xfs/xfs_btree.h    2008-08-02 04:05:00.000000000 +0200
@@ -63,15 +63,10 @@ typedef struct xfs_btree_lblock {
 /*
  * Combined header and structure, used by common code.
  */
-typedef struct xfs_btree_hdr
-{
+typedef struct xfs_btree_block {
        __be32          bb_magic;       /* magic number for block type */
        __be16          bb_level;       /* 0 is a leaf */
        __be16          bb_numrecs;     /* current # of data records */
-} xfs_btree_hdr_t;
-
-typedef struct xfs_btree_block {
-       xfs_btree_hdr_t bb_h;           /* header */
        union {
                struct {
                        __be32          bb_leftsib;

--