linux-kernel - [PATCH v2 10/31] selftests/mm: Test UFFDIO

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Message-Id: <20230412164234.328168-1-peterx@redhat.com>
Date:   Wed, 12 Apr 2023 12:42:34 -0400
From:   Peter Xu <peterx@...hat.com>
To:     linux-kernel@...r.kernel.org, linux-mm@...ck.org
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Nadav Amit <nadav.amit@...il.com>,
        David Hildenbrand <david@...hat.com>,
        Mike Rapoport <rppt@...ux.vnet.ibm.com>,
        Axel Rasmussen <axelrasmussen@...gle.com>,
        Leonardo Bras Soares Passos <lsoaresp@...hat.com>,
        peterx@...hat.com
Subject: [PATCH v2 10/31] selftests/mm: Test UFFDIO_ZEROPAGE only when !hugetlb

Make the check as simple as "test_type == TEST_HUGETLB" because that's the
only mem that doesn't support ZEROPAGE.

Signed-off-by: Peter Xu <peterx@...hat.com>
---
 tools/testing/selftests/mm/userfaultfd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/mm/userfaultfd.c b/tools/testing/selftests/mm/userfaultfd.c
index 795fbc4d84f8..d724f1c78847 100644
--- a/tools/testing/selftests/mm/userfaultfd.c
+++ b/tools/testing/selftests/mm/userfaultfd.c
@@ -1118,7 +1118,7 @@ static int __uffdio_zeropage(int ufd, unsigned long offset, bool retry)
 {
 	struct uffdio_zeropage uffdio_zeropage;
 	int ret;
-	bool has_zeropage = get_expected_ioctls(0) & (1 << _UFFDIO_ZEROPAGE);
+	bool has_zeropage = !(test_type == TEST_HUGETLB);
 	__s64 res;
 
 	if (offset >= nr_pages * page_size)
-- 
2.39.1