Add control page offset checksstaging

Make sure the kernel and userspace compilers have the same idea of the
layout of the control page.

1 files changed, 2 insertions, 0 deletions

diff --git a/include/internal.h b/include/internal.h
index 747f095..035440b 100644
--- a/include/internal.h
+++ b/include/internal.h
@@ -23,6 +23,8 @@ int __launch_rt_task(rt_fn_t rt_prog, void *rt_arg,
 #define likely(x)   __builtin_expect((x), 1)
 #define unlikely(x) __builtin_expect((x), 0)
 
+#define offsetof(s, x) __builtin_offsetof(s, x)
+
 #define BUILD_BUG_ON_ZERO(e) (sizeof(struct { int:-!!(e); }))
 #define BUILD_BUG_ON(condition) ((void)BUILD_BUG_ON_ZERO(condition))