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-rw-r--r--fs/bcachefs/alloc_background.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/bcachefs/alloc_background.c b/fs/bcachefs/alloc_background.c
index 43c29b0d2d20..a35455802280 100644
--- a/fs/bcachefs/alloc_background.c
+++ b/fs/bcachefs/alloc_background.c
@@ -2093,6 +2093,13 @@ static int invalidate_one_bucket(struct btree_trans *trans,
if (lru_pos_time(lru_iter->pos) != alloc_lru_idx_read(a->v))
goto out;
+ /*
+ * Impossible since alloc_lru_idx_read() only returns nonzero if the
+ * bucket is supposed to be on the cached bucket LRU (i.e.
+ * BCH_DATA_cached)
+ *
+ * bch2_lru_validate() also disallows lru keys with lru_pos_time() == 0
+ */
BUG_ON(a->v.data_type != BCH_DATA_cached);
BUG_ON(a->v.dirty_sectors);