diff --git a/sys/compat/linuxkpi/common/include/linux/compiler.h b/sys/compat/linuxkpi/common/include/linux/compiler.h
--- a/sys/compat/linuxkpi/common/include/linux/compiler.h
+++ b/sys/compat/linuxkpi/common/include/linux/compiler.h
@@ -88,11 +88,9 @@
 #define	___PASTE(a,b) a##b
 #define	__PASTE(a,b) ___PASTE(a,b)
 
-#define	ACCESS_ONCE(x)			(*(volatile __typeof(x) *)&(x))
-
 #define	WRITE_ONCE(x,v) do {		\
 	barrier();			\
-	ACCESS_ONCE(x) = (v);		\
+	(*(volatile __typeof(x) *)(uintptr_t)&(x)) = (v); \
 	barrier();			\
 } while (0)