selftests/mm: skip failed memfd setups in gup_longterm

Unlike the other cases gup_longterm's memfd tests previously skipped the
test when failing to set up the file descriptor to test.  Restore this
behavior to avoid hitting failures when hugetlb isn't configured.

Link: https://lkml.kernel.org/r/20250605-selftest-mm-gup-longterm-tweaks-v1-1-2fae34b05958@kernel.org
Fixes: 66bce7a ("selftests/mm: fix test result reporting in gup_longterm")
Signed-off-by: Mark Brown <[email protected]>
Reported-by: Lorenzo Stoakes <[email protected]>
Closes: https://lkml.kernel.org/r/[email protected]
Reviewed-by: Lorenzo Stoakes <[email protected]>
Tested-by: Lorenzo Stoakes <[email protected]>
Acked-by: David Hildenbrand <[email protected]>
Cc: Shuah Khan <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: broonie

tools/testing/selftests/mm/gup_longterm.c

@@ -298,8 +298,11 @@ static void run_with_memfd(test_fn fn, const char *desc)
 	log_test_start("%s ... with memfd", desc);
 
 	fd = memfd_create("test", 0);
-	if (fd < 0)
+	if (fd < 0) {
 		ksft_print_msg("memfd_create() failed (%s)\n", strerror(errno));
+		log_test_result(KSFT_SKIP);
+		return;
+	}
 
 	fn(fd, pagesize);
 	close(fd);
@@ -366,6 +369,8 @@ static void run_with_memfd_hugetlb(test_fn fn, const char *desc,
 	fd = memfd_create("test", flags);
 	if (fd < 0) {
 		ksft_print_msg("memfd_create() failed (%s)\n", strerror(errno));
+		log_test_result(KSFT_SKIP);
+		return;
 	}
 
 	fn(fd, hugetlbsize);