[RFC PATCH v5 04/10] KVM: selftests: Print the errno besides error-string in TEST_ASSERT

[Yanan Wang]

Print the errno besides error-string in TEST_ASSERT in the format of
"errno=%d - %s" will explicitly indicate that the string is an error
information. Besides, the errno is easier to be used for debugging
than the error-string.

Suggested-by: Andrew Jones <drjones@xxxxxxxxxx>
Signed-off-by: Yanan Wang <wangyanan55@xxxxxxxxxx>
---
 tools/testing/selftests/kvm/lib/assert.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/kvm/lib/assert.c b/tools/testing/selftests/kvm/lib/assert.c
index 5ebbd0d6b472..71ade6100fd3 100644
--- a/tools/testing/selftests/kvm/lib/assert.c
+++ b/tools/testing/selftests/kvm/lib/assert.c
@@ -71,9 +71,9 @@ test_assert(bool exp, const char *exp_str,
 
 		fprintf(stderr, "==== Test Assertion Failure ====\n"
 			"  %s:%u: %s\n"
-			"  pid=%d tid=%d - %s\n",
+			"  pid=%d tid=%d errno=%d - %s\n",
 			file, line, exp_str, getpid(), _gettid(),
-			strerror(errno));
+			errno, strerror(errno));
 		test_dump_stack();
 		if (fmt) {
 			fputs("  ", stderr);
-- 
2.19.1