[PATCH v3 8/9] selftests/mm: fix exit code in pagemap_ioctl

[Kevin Brodsky <kevin.brodsky@arm.com>]

Make sure pagemap_ioctl exits with an appropriate value:

* If the tests are run, call ksft_finished() to report the right
  status instead of reporting PASS unconditionally.

* Report SKIP if userfaultfd isn't available (in line with other
  tests)

* Report FAIL if we failed to open /proc/self/pagemap, as this file
  has been added a long time ago and doesn't depend on any CONFIG
  option (returning -EINVAL from main() is meaningless)

Cc: Usama Anjum <Usama.Anjum@arm.com>
Reviewed-by: Ryan Roberts <ryan.roberts@arm.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Acked-by: David Hildenbrand (Red Hat) <david@kernel.org>
Acked-by: SeongJae Park <sj@kernel.org>
Reviewed-by: wang lian <lianux.mm@gmail.com>
Reviewed-by: Dev Jain <dev.jain@arm.com>
Signed-off-by: Kevin Brodsky <kevin.brodsky@arm.com>
---
 tools/testing/selftests/mm/pagemap_ioctl.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/testing/selftests/mm/pagemap_ioctl.c b/tools/testing/selftests/mm/pagemap_ioctl.c
index 1896c7d4f72e..2ca8a7e3c27e 100644
--- a/tools/testing/selftests/mm/pagemap_ioctl.c
+++ b/tools/testing/selftests/mm/pagemap_ioctl.c
@@ -1552,7 +1552,7 @@ int main(int __attribute__((unused)) argc, char *argv[])
 	ksft_print_header();
 
 	if (init_uffd())
-		ksft_exit_pass();
+		ksft_exit_skip("Failed to initialize userfaultfd\n");
 
 	ksft_set_plan(117);
 
@@ -1561,7 +1561,7 @@ int main(int __attribute__((unused)) argc, char *argv[])
 
 	pagemap_fd = open(PAGEMAP, O_RDONLY);
 	if (pagemap_fd < 0)
-		return -EINVAL;
+		ksft_exit_fail_msg("Failed to open " PAGEMAP "\n");
 
 	/* 1. Sanity testing */
 	sanity_tests_sd();
@@ -1733,5 +1733,5 @@ int main(int __attribute__((unused)) argc, char *argv[])
 	zeropfn_tests();
 
 	close(pagemap_fd);
-	ksft_exit_pass();
+	ksft_finished();
 }
-- 
2.51.2