From 21446f2890b124fd46c7f3b1244f0f24d80670b3 Mon Sep 17 00:00:00 2001
From: kib <kib@FreeBSD.org>
Date: Fri, 8 Apr 2016 10:21:43 +0000
Subject: Assert that the lock objects put into the off-page, fit into the
 page.

Sponsored by:	The FreeBSD Foundation
---
 lib/libthr/thread/thr_mutex.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'lib/libthr/thread/thr_mutex.c')

diff --git a/lib/libthr/thread/thr_mutex.c b/lib/libthr/thread/thr_mutex.c
index 865e4cf..f732a63 100644
--- a/lib/libthr/thread/thr_mutex.c
+++ b/lib/libthr/thread/thr_mutex.c
@@ -51,6 +51,9 @@
 
 #include "thr_private.h"
 
+_Static_assert(sizeof(struct pthread_mutex) <= PAGE_SIZE,
+    "pthread_mutex is too large for off-page");
+
 /*
  * For adaptive mutexes, how many times to spin doing trylock2
  * before entering the kernel to block
-- 
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