Index: sys/compat/linuxkpi/common/include/linux/kernel.h
===================================================================
--- sys/compat/linuxkpi/common/include/linux/kernel.h
+++ sys/compat/linuxkpi/common/include/linux/kernel.h
@@ -109,9 +109,7 @@
 #define	BUILD_BUG_ON_MSG(x, msg)	BUILD_BUG_ON(x)
 #define	BUILD_BUG_ON_NOT_POWER_OF_2(x)	BUILD_BUG_ON(!powerof2(x))
 #define	BUILD_BUG_ON_INVALID(expr)	while (0) { (void)(expr); }
-
-extern const volatile int lkpi_build_bug_on_zero;
-#define	BUILD_BUG_ON_ZERO(x)	((x) ? lkpi_build_bug_on_zero : 0)
+#define	BUILD_BUG_ON_ZERO(x)	((int)sizeof(struct { int:-((x) != 0); }))
 
 #define	BUG()			panic("BUG at %s:%d", __FILE__, __LINE__)
 #define	BUG_ON(cond)		do {				\