[PATCH 4/6] selftests/mm: Skip uffd-wp-mremap if userfaultfd not available

[Brendan Jackman]

It's obvious that this should fail in that case, but still, save the
reader the effort of figuring out that they've run into this by just
SKIPping

Signed-off-by: Brendan Jackman <jackm...@google.com>
---
 tools/testing/selftests/mm/uffd-wp-mremap.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/mm/uffd-wp-mremap.c 
b/tools/testing/selftests/mm/uffd-wp-mremap.c
index 
2c4f984bd73caa17e12b9f4a5bb71e7fdf5d8554..c2ba7d46c7b4581a3c32a6b6acd148e3e89c2172
 100644
--- a/tools/testing/selftests/mm/uffd-wp-mremap.c
+++ b/tools/testing/selftests/mm/uffd-wp-mremap.c
@@ -182,7 +182,10 @@ static void test_one_folio(size_t size, bool private, bool 
swapout, bool hugetlb
 
        /* Register range for uffd-wp. */
        if (userfaultfd_open(&features)) {
-               ksft_test_result_fail("userfaultfd_open() failed\n");
+               if (errno == ENOENT)
+                       ksft_test_result_skip("userfaultfd not available\n");
+               else
+                       ksft_test_result_fail("userfaultfd_open() failed\n");
                goto out;
        }
        if (uffd_register(uffd, mem, size, false, true, false)) {

-- 
2.48.1.601.g30ceb7b040-goog