1 files changed, 4 insertions, 0 deletions

diff --git a/tools/testing/selftests/sigaltstack/sas.c b/tools/testing/selftests/sigaltstack/sas.c
index 7d406c3973ba..97bb150837df 100644
--- a/tools/testing/selftests/sigaltstack/sas.c
+++ b/tools/testing/selftests/sigaltstack/sas.c
@@ -39,7 +39,11 @@ void my_usr1(int sig, siginfo_t *si, void *u)
         stack_t stk;
         struct stk_data *p;
 
+#if __s390x__
+        register unsigned long sp asm("%15");
+#else
         register unsigned long sp asm("sp");
+#endif
 
         if (sp < (unsigned long)sstack ||
                         sp >= (unsigned long)sstack + SIGSTKSZ) {