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>> struct anon_vma **anon_vmap) >> { >> unsigned long private = (unsigned long)dst->private; >> >> - *anon_vmap = (struct anon_vma *)(private & ~PAGE_OLD_STATES); >> - *old_page_state = private & PAGE_OLD_STATES; >> + *anon_vmap = (struct anon_vma *)(private & ~FOLIO_OLD_STATES); >> + *old_folio_state = private & FOLIO_OLD_STATES; >> dst->private = NULL; >> } > > Just an observation on folio->private, it is void*, but page->private > is unsigned long. It confused me a bit. There are folio_get_private() > and folio_change_private(), I wonder if we want to use them here > instead of direct ->private accesses. Feel free to ignore this, > since it is irrelevant to this patch. Would something like this as a follow-up patch work? diff --git a/mm/migrate.c b/mm/migrate.c index 6d4a85f903d8..55d1af6c9759 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -1143,17 +1143,17 @@ enum { static void __migrate_folio_record(struct folio *dst, int old_folio_state, struct anon_vma *anon_vma) { - dst->private = (void *)anon_vma + old_folio_state; + folio_change_private(dst, (void *)anon_vma + old_folio_state); } static void __migrate_folio_extract(struct folio *dst, int *old_folio_state, struct anon_vma **anon_vmap) { - unsigned long private = (unsigned long)dst->private; + unsigned long private = (unsigned long)folio_get_private(dst); *anon_vmap = (struct anon_vma *)(private & ~FOLIO_OLD_STATES); *old_folio_state = private & FOLIO_OLD_STATES; - dst->private = NULL; + folio_change_private(dst, NULL); } Thanks, Shivank