pop assert when freeing page after bcachefs shutdownbcachefs-put-folio-assert

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

1 files changed, 8 insertions, 0 deletions

diff --git a/mm/swap.c b/mm/swap.c
index 77b2d5997873..56d23d61c9cb 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -45,6 +45,7 @@
 
 /* How many pages do we try to swap or page in/out together? As a power of 2 */
 int page_cluster;
+int bcachefs_shutdown;
 static const int page_cluster_max = 31;
 
 struct cpu_fbatches {
@@ -106,6 +107,13 @@ void __folio_put(struct folio *folio)
 		return;
 	}
 
+	if (folio_test_bcachefs_warn(folio) && bcachefs_shutdown) {
+		BUG();
+		dump_stack();
+	}
+
+	folio_clear_bcachefs_warn(folio);
+
 	page_cache_release(folio);
 	folio_unqueue_deferred_split(folio);
 	mem_cgroup_uncharge(folio);