linux-kernel - [PATCH v1] selftests/mm: sigbus-wp test requires UFFD_FEATURE_WP_HUGETLBFS

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Date: Thu, 21 Mar 2024 23:20:21 +0000
From: Edward Liaw <edliaw@...gle.com>
To: linux-kernel@...r.kernel.org, Andrew Morton <akpm@...ux-foundation.org>, 
	Shuah Khan <shuah@...nel.org>
Cc: linux-kselftest@...r.kernel.org, kernel-team@...roid.com, 
	Edward Liaw <edliaw@...gle.com>, linux-mm@...ck.org
Subject: [PATCH v1] selftests/mm: sigbus-wp test requires UFFD_FEATURE_WP_HUGETLBFS_SHMEM

The sigbus-wp test requires the UFFD_FEATURE_WP_HUGETLBFS_SHMEM flag for
shmem and hugetlb targets.  Otherwise it is not backwards compatible
with kernels <5.19 and fails with EINVAL.

Signed-off-by: Edward Liaw <edliaw@...gle.com>
---
 tools/testing/selftests/mm/uffd-unit-tests.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/mm/uffd-unit-tests.c b/tools/testing/selftests/mm/uffd-unit-tests.c
index 4a48dc617c6b..21ec23206ab4 100644
--- a/tools/testing/selftests/mm/uffd-unit-tests.c
+++ b/tools/testing/selftests/mm/uffd-unit-tests.c
@@ -1437,7 +1437,8 @@ uffd_test_case_t uffd_tests[] = {
 		.uffd_fn = uffd_sigbus_wp_test,
 		.mem_targets = MEM_ALL,
 		.uffd_feature_required = UFFD_FEATURE_SIGBUS |
-		UFFD_FEATURE_EVENT_FORK | UFFD_FEATURE_PAGEFAULT_FLAG_WP,
+		UFFD_FEATURE_EVENT_FORK | UFFD_FEATURE_PAGEFAULT_FLAG_WP |
+		UFFD_FEATURE_WP_HUGETLBFS_SHMEM,
 	},
 	{
 		.name = "events",
-- 
2.44.0.396.g6e790dbe36-goog