[PATCH] tests: SKIP pc test on s390

[Mike Frysinger]

The s390 hardware can't support an exact si_addr, and the current kernels
don't handle text addresses correctly at all.  Until that improves, skip
the test on s390.

* tests/pc.c (main): Return 77 on s390 systems.
---
 tests/pc.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/tests/pc.c b/tests/pc.c
index a450c0d..4f12701 100644
--- a/tests/pc.c
+++ b/tests/pc.c
@@ -12,6 +12,14 @@ int main(void)
 {
 	const unsigned long pagesize = sysconf(_SC_PAGESIZE);
 
+#ifdef __s390__
+	/*
+	 * The si_addr field is unreliable:
+	 * https://marc.info/?l=linux-s390&m=142515870124248&w=2
+	 */
+	return 77;
+#endif
+
 	/* write instruction pointer length to the log */
 	if (write(-1, NULL, 2 * sizeof(void *)) >= 0)
 		return 77;
-- 
2.3.1