Btrfs: fix compiler warnings on 32 bit systems

The enospc tracing code added some interesting uses of
u64 pointer casts.
Signed-off-by: Chris Mason <chris.mason@oracle.com>

fs/btrfs/check-integrity.c

@@ -644,7 +644,7 @@ static struct btrfsic_dev_state *btrfsic_dev_state_hashtable_lookup(
 static int btrfsic_process_superblock(struct btrfsic_state *state,
 				      struct btrfs_fs_devices *fs_devices)
 {
-	int ret;
+	int ret = 0;
 	struct btrfs_super_block *selected_super;
 	struct list_head *dev_head = &fs_devices->devices;
 	struct btrfs_device *device;

fs/btrfs/extent-tree.c

@@ -3312,7 +3312,8 @@ int btrfs_check_data_free_space(struct inode *inode, u64 bytes)
 	}
 	data_sinfo->bytes_may_use += bytes;
 	trace_btrfs_space_reservation(root->fs_info, "space_info",
-				      (u64)data_sinfo, bytes, 1);
+				      (u64)(unsigned long)data_sinfo,
+				      bytes, 1);
 	spin_unlock(&data_sinfo->lock);
 
 	return 0;
@@ -3333,7 +3334,8 @@ void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes)
 	spin_lock(&data_sinfo->lock);
 	data_sinfo->bytes_may_use -= bytes;
 	trace_btrfs_space_reservation(root->fs_info, "space_info",
-				      (u64)data_sinfo, bytes, 0);
+				      (u64)(unsigned long)data_sinfo,
+				      bytes, 0);
 	spin_unlock(&data_sinfo->lock);
 }
 
@@ -3699,7 +3701,7 @@ static int reserve_metadata_bytes(struct btrfs_root *root,
 			space_info->bytes_may_use += orig_bytes;
 			trace_btrfs_space_reservation(root->fs_info,
 					      "space_info",
-						      (u64)space_info,
+					      (u64)(unsigned long)space_info,
 					      orig_bytes, 1);
 			ret = 0;
 		} else {
@@ -3770,7 +3772,7 @@ static int reserve_metadata_bytes(struct btrfs_root *root,
 			space_info->bytes_may_use += orig_bytes;
 			trace_btrfs_space_reservation(root->fs_info,
 					      "space_info",
-						      (u64)space_info,
+					      (u64)(unsigned long)space_info,
 					      orig_bytes, 1);
 			ret = 0;
 		} else {
@@ -3916,7 +3918,7 @@ static void block_rsv_release_bytes(struct btrfs_fs_info *fs_info,
 			spin_lock(&space_info->lock);
 			space_info->bytes_may_use -= num_bytes;
 			trace_btrfs_space_reservation(fs_info, "space_info",
-						      (u64)space_info,
+					      (u64)(unsigned long)space_info,
 					      num_bytes, 0);
 			space_info->reservation_progress++;
 			spin_unlock(&space_info->lock);
@@ -4135,14 +4137,14 @@ static void update_global_block_rsv(struct btrfs_fs_info *fs_info)
 		block_rsv->reserved += num_bytes;
 		sinfo->bytes_may_use += num_bytes;
 		trace_btrfs_space_reservation(fs_info, "space_info",
-					      (u64)sinfo, num_bytes, 1);
+				      (u64)(unsigned long)sinfo, num_bytes, 1);
 	}
 
 	if (block_rsv->reserved >= block_rsv->size) {
 		num_bytes = block_rsv->reserved - block_rsv->size;
 		sinfo->bytes_may_use -= num_bytes;
 		trace_btrfs_space_reservation(fs_info, "space_info",
-					      (u64)sinfo, num_bytes, 0);
+				      (u64)(unsigned long)sinfo, num_bytes, 0);
 		sinfo->reservation_progress++;
 		block_rsv->reserved = block_rsv->size;
 		block_rsv->full = 1;
@@ -4195,7 +4197,8 @@ void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
 	if (!trans->bytes_reserved)
 		return;
 
-	trace_btrfs_space_reservation(root->fs_info, "transaction", (u64)trans,
+	trace_btrfs_space_reservation(root->fs_info, "transaction",
+				      (u64)(unsigned long)trans,
 				      trans->bytes_reserved, 0);
 	btrfs_block_rsv_release(root, trans->block_rsv, trans->bytes_reserved);
 	trans->bytes_reserved = 0;
@@ -4714,7 +4717,7 @@ static int btrfs_update_reserved_bytes(struct btrfs_block_group_cache *cache,
 			if (reserve == RESERVE_ALLOC) {
 				trace_btrfs_space_reservation(cache->fs_info,
 					      "space_info",
-							      (u64)space_info,
+					      (u64)(unsigned long)space_info,
 					      num_bytes, 0);
 				space_info->bytes_may_use -= num_bytes;
 			}

fs/btrfs/inode-map.c

@@ -438,7 +438,8 @@ int btrfs_save_ino_cache(struct btrfs_root *root,
 					  trans->bytes_reserved);
 	if (ret)
 		goto out;
-	trace_btrfs_space_reservation(root->fs_info, "ino_cache", (u64)trans,
+	trace_btrfs_space_reservation(root->fs_info, "ino_cache",
+				      (u64)(unsigned long)trans,
 				      trans->bytes_reserved, 1);
 again:
 	inode = lookup_free_ino_inode(root, path);
@@ -500,7 +501,8 @@ int btrfs_save_ino_cache(struct btrfs_root *root,
 out_put:
 	iput(inode);
 out_release:
-	trace_btrfs_space_reservation(root->fs_info, "ino_cache", (u64)trans,
+	trace_btrfs_space_reservation(root->fs_info, "ino_cache",
+				      (u64)(unsigned long)trans,
 				      trans->bytes_reserved, 0);
 	btrfs_block_rsv_release(root, trans->block_rsv, trans->bytes_reserved);
 out:

fs/btrfs/transaction.c

@@ -327,7 +327,8 @@ static struct btrfs_trans_handle *start_transaction(struct btrfs_root *root,
 
 	if (num_bytes) {
 		trace_btrfs_space_reservation(root->fs_info, "transaction",
-					      (u64)h, num_bytes, 1);
+					      (u64)(unsigned long)h,
+					      num_bytes, 1);
 		h->block_rsv = &root->fs_info->trans_block_rsv;
 		h->bytes_reserved = num_bytes;
 	}