mm/huge_memory: ensure huge_zero_folio won't have large_rmappable flag set

Ensure huge_zero_folio won't have large_rmappable flag set.  So it can be
reported as thp,zero correctly through stable_page_flags().

Link: https://lkml.kernel.org/r/20240914015306.3656791-1-linmiaohe@huawei.com
Fixes: 5691753d73a2 ("mm: convert huge_zero_page to huge_zero_folio")
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 67c86a5d64a6a9825092c54ba801c91fa30121db..99b146d16a18508ea56b0871b256a3e00918d1de 100644 (file)
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -220,6 +220,8 @@ retry:
                count_vm_event(THP_ZERO_PAGE_ALLOC_FAILED);
                return false;
        }
+       /* Ensure zero folio won't have large_rmappable flag set. */
+       folio_clear_large_rmappable(zero_folio);
        preempt_disable();
        if (cmpxchg(&huge_zero_folio, NULL, zero_folio)) {
                preempt_enable();