linux: Only use 64-bit syscall if required for mq_timedsend

For !__ASSUME_TIME64_SYSCALLS there is no need to issue a 64-bit syscall
if the provided timeout fits in a 32-bit one.  The 64-bit usage should
be rare since the timeout is a relative one.

Checked on i686-linux-gnu on a 4.15 kernel and on a 5.11 kernel
(with and without --enable-kernel=5.1) and on x86_64-linux-gnu.

Reviewed-by: Lukasz Majewski <lukma@denx.de>

1 files changed, 10 insertions, 0 deletions

diff --git a/rt/tst-mqueue10.c b/rt/tst-mqueue10.c
index 7fb53a1..1879580 100644
--- a/rt/tst-mqueue10.c
+++ b/rt/tst-mqueue10.c
@@ -54,6 +54,16 @@ do_test (void)
     support_delete_timer (timer);
   }
 
+  {
+    timer_t timer = support_create_timer (0, 100000000, false, NULL);
+    /* Fill the internal buffer first.  */
+    TEST_COMPARE (mq_timedsend (q, msg, sizeof (msg), 0,
+				&(struct timespec) { 0, 0 }), 0);
+    TEST_COMPARE (mq_timedsend (q, msg, sizeof (msg), 0, &ts), -1);
+    TEST_VERIFY (errno == EINTR || errno == EOVERFLOW);
+    support_delete_timer (timer);
+  }
+
   mq_unlink (name);
 
   return 0;