bcachefs: Use bch2_err_str() in error messages

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
diff --git a/fs/bcachefs/move.c b/fs/bcachefs/move.c
index 8b44d95..7fba0f7 100644
--- a/fs/bcachefs/move.c
+++ b/fs/bcachefs/move.c
@@ -8,6 +8,7 @@
 #include "btree_update_interior.h"
 #include "disk_groups.h"
 #include "ec.h"
+#include "errcode.h"
 #include "inode.h"
 #include "io.h"
 #include "journal_reclaim.h"
@@ -564,7 +565,7 @@ static int bch2_move_btree(struct bch_fs *c,
 	bch2_trans_exit(&trans);
 
 	if (ret)
-		bch_err(c, "error %i in bch2_move_btree", ret);
+		bch_err(c, "error in %s(): %s", __func__, bch2_err_str(ret));
 
 	bch2_btree_interior_updates_flush(c);