btrfs: rip out btrfs_space_info::total_bytes_pinned

We used this in may_commit_transaction() in order to determine if we
needed to commit the transaction.  However we no longer have that logic
and thus have no use of this counter anymore, so delete it.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

1 files changed, 0 insertions, 26 deletions

diff --git a/fs/btrfs/delayed-ref.c b/fs/btrfs/delayed-ref.c
index c92d9d4f5f46..06bc842ecdb3 100644
--- a/fs/btrfs/delayed-ref.c
+++ b/fs/btrfs/delayed-ref.c
@@ -641,7 +641,6 @@ static noinline void update_existing_head_ref(struct btrfs_trans_handle *trans,
 	struct btrfs_delayed_ref_root *delayed_refs =
 		&trans->transaction->delayed_refs;
 	struct btrfs_fs_info *fs_info = trans->fs_info;
-	u64 flags = btrfs_ref_head_to_space_flags(existing);
 	int old_ref_mod;
 
 	BUG_ON(existing->is_data != update->is_data);
@@ -711,26 +710,6 @@ static noinline void update_existing_head_ref(struct btrfs_trans_handle *trans,
 		}
 	}
 
-	/*
-	 * This handles the following conditions:
-	 *
-	 * 1. We had a ref mod of 0 or more and went negative, indicating that
-	 *    we may be freeing space, so add our space to the
-	 *    total_bytes_pinned counter.
-	 * 2. We were negative and went to 0 or positive, so no longer can say
-	 *    that the space would be pinned, decrement our counter from the
-	 *    total_bytes_pinned counter.
-	 * 3. We are now at 0 and have ->must_insert_reserved set, which means
-	 *    this was a new allocation and then we dropped it, and thus must
-	 *    add our space to the total_bytes_pinned counter.
-	 */
-	if (existing->total_ref_mod < 0 && old_ref_mod >= 0)
-		btrfs_mod_total_bytes_pinned(fs_info, flags, existing->num_bytes);
-	else if (existing->total_ref_mod >= 0 && old_ref_mod < 0)
-		btrfs_mod_total_bytes_pinned(fs_info, flags, -existing->num_bytes);
-	else if (existing->total_ref_mod == 0 && existing->must_insert_reserved)
-		btrfs_mod_total_bytes_pinned(fs_info, flags, existing->num_bytes);
-
 	spin_unlock(&existing->lock);
 }
 
@@ -835,17 +814,12 @@ add_delayed_ref_head(struct btrfs_trans_handle *trans,
 		kmem_cache_free(btrfs_delayed_ref_head_cachep, head_ref);
 		head_ref = existing;
 	} else {
-		u64 flags = btrfs_ref_head_to_space_flags(head_ref);
-
 		if (head_ref->is_data && head_ref->ref_mod < 0) {
 			delayed_refs->pending_csums += head_ref->num_bytes;
 			trans->delayed_ref_updates +=
 				btrfs_csum_bytes_to_leaves(trans->fs_info,
 							   head_ref->num_bytes);
 		}
-		if (head_ref->ref_mod < 0)
-			btrfs_mod_total_bytes_pinned(trans->fs_info, flags,
-						     head_ref->num_bytes);
 		delayed_refs->num_heads++;
 		delayed_refs->num_heads_ready++;
 		atomic_inc(&delayed_refs->num_entries);