btrfs: get fs_info from trans in btrfs_need_log_full_commit

We can read fs_info from the transaction and can drop it from the
parameters.
Signed-off-by: NDavid Sterba <dsterba@suse.com>

fs/btrfs/tree-log.c

@@ -139,7 +139,7 @@ static int start_log_trans(struct btrfs_trans_handle *trans,
 	mutex_lock(&root->log_mutex);
 
 	if (root->log_root) {
-		if (btrfs_need_log_full_commit(fs_info, trans)) {
+		if (btrfs_need_log_full_commit(trans)) {
 			ret = -EAGAIN;
 			goto out;
 		}
@@ -3077,7 +3077,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
 	}
 
 	/* bail out if we need to do a full commit */
-	if (btrfs_need_log_full_commit(fs_info, trans)) {
+	if (btrfs_need_log_full_commit(trans)) {
 		ret = -EAGAIN;
 		mutex_unlock(&root->log_mutex);
 		goto out;
@@ -3184,7 +3184,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
 	 * now that we've moved on to the tree of log tree roots,
 	 * check the full commit flag again
 	 */
-	if (btrfs_need_log_full_commit(fs_info, trans)) {
+	if (btrfs_need_log_full_commit(trans)) {
 		blk_finish_plug(&plug);
 		btrfs_wait_tree_log_extents(log, mark);
 		mutex_unlock(&log_root_tree->log_mutex);

fs/btrfs/tree-log.h

@@ -36,10 +36,9 @@ static inline void btrfs_set_log_full_commit(struct btrfs_fs_info *fs_info,
 	WRITE_ONCE(fs_info->last_trans_log_full_commit, trans->transid);
 }
 
-static inline int btrfs_need_log_full_commit(struct btrfs_fs_info *fs_info,
-					     struct btrfs_trans_handle *trans)
+static inline int btrfs_need_log_full_commit(struct btrfs_trans_handle *trans)
 {
-	return READ_ONCE(fs_info->last_trans_log_full_commit) ==
+	return READ_ONCE(trans->fs_info->last_trans_log_full_commit) ==
 		trans->transid;
 }