[PATCH] y2038: testsuite/smokey/y2038: Run tests on y2038 safe kernels only

[Florian Bezdeka via Xenomai]

Especially 4.19 is not 2038 safe and 32 bit kernels do not have
CONFIG_64BIT_TIME set, which ends up in __kernel_timespec being defined
in a non y2038 safe way.

cobalt_get_timespec64 will copy the upper bytes of the sec field into
the nsec field, which is always zero.

Testing y2038 syscalls on a non y2038 safe kernel doesn't make sense,
hence limiting the test runs to kernels with 2038 support.

Signed-off-by: Florian Bezdeka <florian.bezd...@siemens.com>
---
 testsuite/smokey/y2038/syscall-tests.c | 27 ++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/testsuite/smokey/y2038/syscall-tests.c 
b/testsuite/smokey/y2038/syscall-tests.c
index 8afedd7d1..c23a54f5d 100644
--- a/testsuite/smokey/y2038/syscall-tests.c
+++ b/testsuite/smokey/y2038/syscall-tests.c
@@ -11,6 +11,7 @@
  */
 #include <asm/xenomai/syscall.h>
 #include <smokey/smokey.h>
+#include <sys/utsname.h>
 #include <mqueue.h>
 
 smokey_test_plugin(y2038, SMOKEY_NOARGS, "Validate correct y2038 support");
@@ -989,10 +990,36 @@ static int test_sc_cobalt_event_wait64(void)
        return 0;
 }
 
+static int check_kernel_version(void)
+{
+       int ret, major, minor;
+       struct utsname uts;
+
+       ret = smokey_check_errno(uname(&uts));
+       if (ret)
+               return ret;
+
+       ret = sscanf(uts.release, "%d.%d", &major, &minor);
+       if (!smokey_assert(ret == 2))
+               return -EINVAL;
+
+       /* We need a kernel with y2038 support, 5.4 onwards */
+       if (!(major > 5 || (major == 5 && minor >= 4))) {
+               smokey_note("y2038: skipped. (no y2038 safe kernel)");
+               return 1;
+       }
+
+       return 0;
+}
+
 static int run_y2038(struct smokey_test *t, int argc, char *const argv[])
 {
        int ret;
 
+       ret = check_kernel_version();
+       if (ret)
+               return (ret < 0) ? ret : 0; /* skip if no y2038 safe kernel */
+
        ret = test_sc_cobalt_sem_timedwait64();
        if (ret)
                return ret;
-- 
2.30.2