btrfs: Remove btrfs_fs_info::open_ioctl_trans

Since userspace transaction have been removed we no longer have use
for this field so delete it.
Signed-off-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

@@ -880,7 +880,6 @@ struct btrfs_fs_info {
 	struct rb_root tree_mod_log;
 
 	atomic_t async_delalloc_pages;
-	atomic_t open_ioctl_trans;
 
 	/*
 	 * this is used to protect the following list -- ordered_roots.

fs/btrfs/extent-tree.c

@@ -4338,8 +4338,7 @@ int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes)
 
 		/* commit the current transaction and try again */
 commit_trans:
-		if (need_commit &&
-		    !atomic_read(&fs_info->open_ioctl_trans)) {
+		if (need_commit) {
 			need_commit--;
 
 			if (need_commit > 0) {

fs/btrfs/transaction.c

@@ -443,8 +443,7 @@ static int may_wait_transaction(struct btrfs_fs_info *fs_info, int type)
 	if (test_bit(BTRFS_FS_LOG_RECOVERING, &fs_info->flags))
 		return 0;
 
-	if (type == TRANS_START &&
-	    !atomic_read(&fs_info->open_ioctl_trans))
+	if (type == TRANS_START)
 		return 1;
 
 	return 0;
@@ -766,8 +765,7 @@ int btrfs_wait_for_commit(struct btrfs_fs_info *fs_info, u64 transid)
 
 void btrfs_throttle(struct btrfs_fs_info *fs_info)
 {
-	if (!atomic_read(&fs_info->open_ioctl_trans))
-		wait_current_trans(fs_info);
+	wait_current_trans(fs_info);
 }
 
 static int should_end_transaction(struct btrfs_trans_handle *trans)
@@ -870,8 +868,7 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans,
 
 	btrfs_trans_release_chunk_metadata(trans);
 
-	if (lock && !atomic_read(&info->open_ioctl_trans) &&
-	    should_end_transaction(trans) &&
+	if (lock && should_end_transaction(trans) &&
 	    READ_ONCE(cur_trans->state) == TRANS_STATE_RUNNING) {
 		spin_lock(&info->trans_lock);
 		if (cur_trans->state == TRANS_STATE_RUNNING)