thp: avoid VM_BUG_ON page_count(page) false positives in __collapse_huge_page_copy

[cascardo/linux.git] / mm / huge_memory.c

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 57c4b93..141dbb6 100644 (file)
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1811,7 +1811,6 @@ static void __collapse_huge_page_copy(pte_t *pte, struct page *page,
                        src_page = pte_page(pteval);
                        copy_user_highpage(page, src_page, address, vma);
                        VM_BUG_ON(page_mapcount(src_page) != 1);
-                       VM_BUG_ON(page_count(src_page) != 2);
                        release_pte_page(src_page);
                        /*
                         * ptl mostly unnecessary, but preempt has to