bcachefs: Fix initialization order for srcu barrier

btree_iter_init() needs to happen before key_cache_init(), to initialize
btree_trans_barrier

Reported-by: syzbot+3cca837c2183f8f6fcaf@syzkaller.appspotmail.com
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

diff --git a/fs/bcachefs/super.c b/fs/bcachefs/super.c
index 65e239d329157c1cebe43ab4541af2beb6af45a9..635da5b3439cf2e90e8458ea6080dad6d36ad8b8 100644 (file)
--- a/fs/bcachefs/super.c
+++ b/fs/bcachefs/super.c
@@ -912,9 +912,9 @@ static struct bch_fs *bch2_fs_alloc(struct bch_sb *sb, struct bch_opts opts)
            bch2_io_clock_init(&c->io_clock[WRITE]) ?:
            bch2_fs_journal_init(&c->journal) ?:
            bch2_fs_replicas_init(c) ?:
+           bch2_fs_btree_iter_init(c) ?:
            bch2_fs_btree_cache_init(c) ?:
            bch2_fs_btree_key_cache_init(&c->btree_key_cache) ?:
-           bch2_fs_btree_iter_init(c) ?:
            bch2_fs_btree_interior_update_init(c) ?:
            bch2_fs_buckets_waiting_for_journal_init(c) ?:
            bch2_fs_btree_write_buffer_init(c) ?: