bcachefs: Fix warning in bch2_fs_journal_stop()

j->last_empty_seq needs to match j->seq when the journal is empty

Reported-by: syzbot+4093905737cf289b6b38@syzkaller.appspotmail.com
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

diff --git a/fs/bcachefs/journal.c b/fs/bcachefs/journal.c
index 649e3a01608af408d70f6b2f498f01255589f70c..f5f7db50ca310c3a5d8fc39f25925f516230bc6d 100644 (file)
--- a/fs/bcachefs/journal.c
+++ b/fs/bcachefs/journal.c
@@ -1260,7 +1260,7 @@ int bch2_fs_journal_start(struct journal *j, u64 cur_seq)
        }
 
        if (!had_entries)
-               j->last_empty_seq = cur_seq;
+               j->last_empty_seq = cur_seq - 1; /* to match j->seq */
 
        spin_lock(&j->lock);