mm: fix VM_BUG_ON in __delete_from_swap_cache()

Patch series "Folio fixes for 6.0".


This patch (of 2):

The recent folio conversion changed the VM_BUG_ON() to dump the folio
we're storing instead of the entry we retrieved.  This was a mistake;
the entry we retrieved is the more interesting page to dump.

Link: https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/[email protected]
Fixes: ceff9d3 ("mm/swap: convert __delete_from_swap_cache() to a folio")
Signed-off-by: Matthew Wilcox (Oracle) <[email protected]>
Cc: Hugh Dickins <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

mm/swap_state.c

@@ -151,7 +151,7 @@ void __delete_from_swap_cache(struct folio *folio,
 
 	for (i = 0; i < nr; i++) {
 		void *entry = xas_store(&xas, shadow);
-		VM_BUG_ON_FOLIO(entry != folio, folio);
+		VM_BUG_ON_PAGE(entry != folio, entry);
 		set_page_private(folio_page(folio, i), 0);
 		xas_next(&xas);
 	}