4 files changed, 33 insertions, 18 deletions

diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 10555647005..76281073100 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -58,7 +58,8 @@ int btrfs_cow_block(struct ctree_root *root,
                         free_extent(root, buf->blocknr, 1);
                 tree_block_release(root, buf);
         } else {
-                parent->node.blockptrs[parent_slot] = cow->blocknr;
+                btrfs_set_node_blockptr(&parent->node, parent_slot,
+                                        cow->blocknr);
                 BUG_ON(list_empty(&parent->dirty));
                 free_extent(root, buf->blocknr, 1);
         }
@@ -133,7 +134,7 @@ int check_node(struct ctree_path *path, int level)
                 parent_key = &parent->keys[parent_slot];
                 BUG_ON(memcmp(parent_key, node->keys,
                               sizeof(struct btrfs_disk_key)));
-                BUG_ON(parent->blockptrs[parent_slot] !=
+                BUG_ON(btrfs_node_blockptr(parent, parent_slot) !=
                        btrfs_header_blocknr(&node->header));
         }
         BUG_ON(nritems > NODEPTRS_PER_BLOCK);
@@ -166,7 +167,7 @@ int check_leaf(struct ctree_path *path, int level)
                 parent_key = &parent->keys[parent_slot];
                 BUG_ON(memcmp(parent_key, &leaf->items[0].key,
                        sizeof(struct btrfs_disk_key)));
-                BUG_ON(parent->blockptrs[parent_slot] !=
+                BUG_ON(btrfs_node_blockptr(parent, parent_slot) !=
                        btrfs_header_blocknr(&leaf->header));
         }
         for (i = 0; nritems > 1 && i < nritems - 2; i++) {
@@ -258,7 +259,7 @@ struct tree_buffer *read_node_slot(struct ctree_root *root,
                 return NULL;
         if (slot >= btrfs_header_nritems(&node->header))
                 return NULL;
-        return read_tree_block(root, node->blockptrs[slot]);
+        return read_tree_block(root, btrfs_node_blockptr(node, slot));
 }
 
 static int balance_level(struct ctree_root *root, struct ctree_path *path,
@@ -283,7 +284,7 @@ static int balance_level(struct ctree_root *root, struct ctree_path *path,
 
         mid_buf = path->nodes[level];
         mid = &mid_buf->node;
-        orig_ptr = mid->blockptrs[orig_slot];
+        orig_ptr = btrfs_node_blockptr(mid, orig_slot);
 
         if (level < MAX_LEVEL - 1)
                 parent_buf = path->nodes[level + 1];
@@ -407,7 +408,8 @@ static int balance_level(struct ctree_root *root, struct ctree_path *path,
         }
         /* double check we haven't messed things up */
         check_block(path, level);
-        if (orig_ptr != path->nodes[level]->node.blockptrs[path->slots[level]])
+        if (orig_ptr != btrfs_node_blockptr(&path->nodes[level]->node,
+                                            path->slots[level]))
                 BUG();
 
         if (right_buf)
@@ -482,7 +484,7 @@ again:
                                 slot = p->slots[level];
                                 BUG_ON(btrfs_header_nritems(&c->header) == 1);
                         }
-                        b = read_tree_block(root, c->blockptrs[slot]);
+                        b = read_tree_block(root, btrfs_node_blockptr(c, slot));
                 } else {
                         struct leaf *l = (struct leaf *)c;
                         p->slots[level] = slot;
@@ -660,7 +662,7 @@ static int insert_new_root(struct ctree_root *root,
         else
                 lower_key = lower->keys;
         memcpy(c->keys, lower_key, sizeof(struct btrfs_disk_key));
-        c->blockptrs[0] = path->nodes[level-1]->blocknr;
+        btrfs_set_node_blockptr(c, 0, path->nodes[level - 1]->blocknr);
         /* the super has an extra ref to root->node */
         tree_block_release(root, root->node);
         root->node = t;
@@ -700,7 +702,7 @@ static int insert_ptr(struct ctree_root *root,
                         (nritems - slot) * sizeof(u64));
         }
         memcpy(lower->keys + slot, key, sizeof(struct btrfs_disk_key));
-        lower->blockptrs[slot] = blocknr;
+        btrfs_set_node_blockptr(lower, slot, blocknr);
         btrfs_set_header_nritems(&lower->header, nritems + 1);
         if (lower->keys[1].objectid == 0)
                         BUG();
@@ -820,7 +822,8 @@ static int push_leaf_right(struct ctree_root *root, struct ctree_path *path,
         if (slot >= btrfs_header_nritems(&upper->node.header) - 1) {
                 return 1;
         }
-        right_buf = read_tree_block(root, upper->node.blockptrs[slot + 1]);
+        right_buf = read_tree_block(root, btrfs_node_blockptr(&upper->node,
+                                                              slot + 1));
         right = &right_buf->leaf;
         free_space = leaf_free_space(right);
         if (free_space < data_size + sizeof(struct btrfs_item)) {
@@ -926,7 +929,8 @@ static int push_leaf_left(struct ctree_root *root, struct ctree_path *path,
         if (!path->nodes[1]) {
                 return 1;
         }
-        t = read_tree_block(root, path->nodes[1]->node.blockptrs[slot - 1]);
+        t = read_tree_block(root, btrfs_node_blockptr(&path->nodes[1]->node,
+                                                      slot - 1));
         left = &t->leaf;
         free_space = leaf_free_space(left);
         if (free_space < data_size + sizeof(struct btrfs_item)) {
@@ -1353,7 +1357,7 @@ int next_leaf(struct ctree_root *root, struct ctree_path *path)
                         level++;
                         continue;
                 }
-                blocknr = c->node.blockptrs[slot];
+                blocknr = btrfs_node_blockptr(&c->node, slot);
                 if (next)
                         tree_block_release(root, next);
                 next = read_tree_block(root, blocknr);
@@ -1368,7 +1372,8 @@ int next_leaf(struct ctree_root *root, struct ctree_path *path)
                 path->slots[level] = 0;
                 if (!level)
                         break;
-                next = read_tree_block(root, next->node.blockptrs[0]);
+                next = read_tree_block(root,
+                                       btrfs_node_blockptr(&next->node, 0));
         }
         return 0;
 }
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index b03df154dcd..a8454c401ce 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -128,7 +128,7 @@ struct leaf {
 struct node {
         struct btrfs_header header;
         struct btrfs_disk_key keys[NODEPTRS_PER_BLOCK];
-        u64 blockptrs[NODEPTRS_PER_BLOCK];
+        __le64 blockptrs[NODEPTRS_PER_BLOCK];
 } __attribute__ ((__packed__));
 
 /*
@@ -153,6 +153,16 @@ struct ctree_path {
         int slots[MAX_LEVEL];
 };
 
+static inline u64 btrfs_node_blockptr(struct node *n, int nr)
+{
+        return le64_to_cpu(n->blockptrs[nr]);
+}
+
+static inline void btrfs_set_node_blockptr(struct node *n, int nr, u64 val)
+{
+        n->blockptrs[nr] = cpu_to_le64(val);
+}
+
 static inline u16 btrfs_item_offset(struct btrfs_item *item)
 {
         return le16_to_cpu(item->offset);
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index fdf95bd07f9..e511f48eb48 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -85,7 +85,7 @@ int btrfs_inc_ref(struct ctree_root *root, struct tree_buffer *buf)
                 return 0;
 
         for (i = 0; i < btrfs_header_nritems(&buf->node.header); i++) {
-                blocknr = buf->node.blockptrs[i];
+                blocknr = btrfs_node_blockptr(&buf->node, i);
                 inc_block_ref(root, blocknr);
         }
         return 0;
@@ -437,7 +437,7 @@ int walk_down_tree(struct ctree_root *root, struct ctree_path *path, int *level)
                 if (path->slots[*level] >=
                     btrfs_header_nritems(&cur->node.header))
                         break;
-                blocknr = cur->node.blockptrs[path->slots[*level]];
+                blocknr = btrfs_node_blockptr(&cur->node, path->slots[*level]);
                 ret = lookup_block_ref(root, blocknr, &refs);
                 if (refs != 1 || *level == 1) {
                         path->slots[*level]++;
diff --git a/fs/btrfs/print-tree.c b/fs/btrfs/print-tree.c
index 33f5ee4052c..101278e1139 100644
--- a/fs/btrfs/print-tree.c
+++ b/fs/btrfs/print-tree.c
@@ -54,12 +54,12 @@ void print_tree(struct ctree_root *root, struct tree_buffer *t)
                 printf("\tkey %d (%Lu %u %Lu) block %Lu\n",
                        i,
                        c->keys[i].objectid, c->keys[i].flags, c->keys[i].offset,
-                       c->blockptrs[i]);
+                       btrfs_node_blockptr(c, i));
                 fflush(stdout);
         }
         for (i = 0; i < nr; i++) {
                 struct tree_buffer *next_buf = read_tree_block(root,
-                                                            c->blockptrs[i]);
+                                                btrfs_node_blockptr(c, i));
                 struct node *next = &next_buf->node;
                 if (btrfs_is_leaf(next) &&
                     btrfs_header_level(&c->header) != 1)