selftests: mm: skip whole test instead of failure

Some architectures don't support userfaultfd.  Skip running the whole test
on them instead of registering the failure.

Link: https://lkml.kernel.org/r/20231103182343.2874015-1-usama.anjum@collabora.com
Fixes: 46fd75d4a3c9 ("selftests: mm: add pagemap ioctl tests")
Reported-by: Ryan Roberts <ryan.roberts@arm.com>
Closes: https://lore.kernel.org/all/f8463381-2697-49e9-9460-9dc73452830d@arm.com
Signed-off-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/tools/testing/selftests/mm/pagemap_ioctl.c b/tools/testing/selftests/mm/pagemap_ioctl.c
index 0161fb49fc6ef1dbbc712f472f940ab959d5301d..f8685a2ea07e6bcb9804ee639155bad8927d076b 100644 (file)
--- a/tools/testing/selftests/mm/pagemap_ioctl.c
+++ b/tools/testing/selftests/mm/pagemap_ioctl.c
@@ -94,19 +94,19 @@ int init_uffd(void)
 
        uffd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK | UFFD_USER_MODE_ONLY);
        if (uffd == -1)
-               ksft_exit_fail_msg("uffd syscall failed\n");
+               return uffd;
 
        uffdio_api.api = UFFD_API;
        uffdio_api.features = UFFD_FEATURE_WP_UNPOPULATED | UFFD_FEATURE_WP_ASYNC |
                              UFFD_FEATURE_WP_HUGETLBFS_SHMEM;
        if (ioctl(uffd, UFFDIO_API, &uffdio_api))
-               ksft_exit_fail_msg("UFFDIO_API\n");
+               return -1;
 
        if (!(uffdio_api.api & UFFDIO_REGISTER_MODE_WP) ||
            !(uffdio_api.features & UFFD_FEATURE_WP_UNPOPULATED) ||
            !(uffdio_api.features & UFFD_FEATURE_WP_ASYNC) ||
            !(uffdio_api.features & UFFD_FEATURE_WP_HUGETLBFS_SHMEM))
-               ksft_exit_fail_msg("UFFDIO_API error %llu\n", uffdio_api.api);
+               return -1;
 
        return 0;
 }
@@ -1479,6 +1479,10 @@ int main(void)
        struct stat sbuf;
 
        ksft_print_header();
+
+       if (init_uffd())
+               return ksft_exit_pass();
+
        ksft_set_plan(115);
 
        page_size = getpagesize();
@@ -1488,9 +1492,6 @@ int main(void)
        if (pagemap_fd < 0)
                return -EINVAL;
 
-       if (init_uffd())
-               ksft_exit_fail_msg("uffd init failed\n");
-
        /* 1. Sanity testing */
        sanity_tests_sd();