1 files changed, 6 insertions, 2 deletions
diff --git a/lib/libthr/thread/thr_pspinlock.c b/lib/libthr/thread/thr_pspinlock.c
index 1c9b412..1c83b25 100644
--- a/lib/libthr/thread/thr_pspinlock.c
+++ b/lib/libthr/thread/thr_pspinlock.c
@@ -26,10 +26,11 @@
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
- *
- * $FreeBSD$
  */
 
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
 #include "namespace.h"
 #include <errno.h>
 #include <stdlib.h>
@@ -38,6 +39,9 @@
 
 #include "thr_private.h"
 
+_Static_assert(sizeof(struct pthread_spinlock) <= PAGE_SIZE,
+    "pthread_spinlock is too large for off-page");
+
 #define SPIN_COUNT 100000
 
 __weak_reference(_pthread_spin_init, pthread_spin_init);