btrfs: remove fs_info from btrfs_should_throttle_delayed_refs

The avg_delayed_ref_runtime can be referenced from the transaction
handle.

Signed-off-by: Lu Fengqi <lufq.fnst@cn.fujitsu.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/ctree.h

@@ -2598,8 +2598,7 @@ static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info,
 	return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
 }
 
-int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
-				       struct btrfs_fs_info *fs_info);
+int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans);
 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans);
 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info,
 					 const u64 start);

fs/btrfs/extent-tree.c

@@ -2826,8 +2826,7 @@ int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans)
 	return ret;
 }
 
-int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
-				       struct btrfs_fs_info *fs_info)
+int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans)
 {
 	u64 num_entries =
 		atomic_read(&trans->transaction->delayed_refs.num_entries);
@@ -2835,7 +2834,7 @@ int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
 	u64 val;
 
 	smp_mb();
-	avg_runtime = fs_info->avg_delayed_ref_runtime;
+	avg_runtime = trans->fs_info->avg_delayed_ref_runtime;
 	val = num_entries * avg_runtime;
 	if (val >= NSEC_PER_SEC)
 		return 1;

fs/btrfs/inode.c

@@ -4713,7 +4713,7 @@ delete:
 				btrfs_abort_transaction(trans, ret);
 				break;
 			}
-			if (btrfs_should_throttle_delayed_refs(trans, fs_info))
+			if (btrfs_should_throttle_delayed_refs(trans))
 				btrfs_async_run_delayed_refs(fs_info,
 					trans->delayed_ref_updates * 2,
 					trans->transid, 0);
@@ -4722,8 +4722,7 @@ delete:
 							 extent_num_bytes)) {
 					should_end = true;
 				}
-				if (btrfs_should_throttle_delayed_refs(trans,
-								       fs_info))
+				if (btrfs_should_throttle_delayed_refs(trans))
 					should_throttle = true;
 			}
 		}

fs/btrfs/transaction.c

@@ -835,7 +835,7 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans,
 	trans->delayed_ref_updates = 0;
 	if (!trans->sync) {
 		must_run_delayed_refs =
-			btrfs_should_throttle_delayed_refs(trans, info);
+			btrfs_should_throttle_delayed_refs(trans);
 		cur = max_t(unsigned long, cur, 32);
 
 		/*