bcachefs: Use BTREE_INSERT_LAZY_RW in bch2_check_alloc_info()

This runs before we go rw for journal replay, but after we're allowed to
go rw. It might be time to consider killing BTREE_INSERT_LAZY_RW,
though.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>

fs/bcachefs/alloc_background.c

@@ -784,7 +784,9 @@ int bch2_check_alloc_info(struct bch_fs *c)
 
 	for_each_btree_key(&trans, iter, BTREE_ID_alloc, POS_MIN,
 			   BTREE_ITER_PREFETCH, k, ret) {
-		ret = __bch2_trans_do(&trans, NULL, NULL, 0,
+		ret = __bch2_trans_do(&trans, NULL, NULL,
+				      BTREE_INSERT_NOFAIL|
+				      BTREE_INSERT_LAZY_RW,
 			bch2_check_alloc_key(&trans, &iter));
 		if (ret)
 			break;
@@ -797,7 +799,9 @@ int bch2_check_alloc_info(struct bch_fs *c)
 	bch2_trans_iter_init(&trans, &iter, BTREE_ID_need_discard, POS_MIN,
 			     BTREE_ITER_PREFETCH);
 	while (1) {
-		ret = __bch2_trans_do(&trans, NULL, NULL, 0,
+		ret = __bch2_trans_do(&trans, NULL, NULL,
+				      BTREE_INSERT_NOFAIL|
+				      BTREE_INSERT_LAZY_RW,
 			bch2_check_discard_freespace_key(&trans, &iter));
 		if (ret)
 			break;
@@ -812,7 +816,9 @@ int bch2_check_alloc_info(struct bch_fs *c)
 	bch2_trans_iter_init(&trans, &iter, BTREE_ID_freespace, POS_MIN,
 			     BTREE_ITER_PREFETCH);
 	while (1) {
-		ret = __bch2_trans_do(&trans, NULL, NULL, 0,
+		ret = __bch2_trans_do(&trans, NULL, NULL,
+				      BTREE_INSERT_NOFAIL|
+				      BTREE_INSERT_LAZY_RW,
 			bch2_check_discard_freespace_key(&trans, &iter));
 		if (ret)
 			break;