[PATCH 06/12] selftests/nolibc: avoid passing NULL to printf("%s")

[Thomas Weißschuh]

Clang on higher optimization levels detects that NULL is passed to
printf("%s") and warns about it.
Avoid the warning.

Signed-off-by: Thomas Weißschuh <li...@weissschuh.net>
---
 tools/testing/selftests/nolibc/nolibc-test.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/nolibc/nolibc-test.c 
b/tools/testing/selftests/nolibc/nolibc-test.c
index 093d0512f4c5..8cbb51dca0cd 100644
--- a/tools/testing/selftests/nolibc/nolibc-test.c
+++ b/tools/testing/selftests/nolibc/nolibc-test.c
@@ -542,7 +542,7 @@ int expect_strzr(const char *expr, int llen)
 {
        int ret = 0;
 
-       llen += printf(" = <%s> ", expr);
+       llen += printf(" = <%s> ", expr ? expr : "(null)");
        if (expr) {
                ret = 1;
                result(llen, FAIL);
@@ -561,7 +561,7 @@ int expect_strnz(const char *expr, int llen)
 {
        int ret = 0;
 
-       llen += printf(" = <%s> ", expr);
+       llen += printf(" = <%s> ", expr ? expr : "(null)");
        if (!expr) {
                ret = 1;
                result(llen, FAIL);

-- 
2.45.2