Index: head/sys/compat/linuxkpi/common/include/linux/compiler.h
===================================================================
--- head/sys/compat/linuxkpi/common/include/linux/compiler.h
+++ head/sys/compat/linuxkpi/common/include/linux/compiler.h
@@ -40,13 +40,13 @@
 #define __force
 #define __nocast
 #define __iomem
-#define __chk_user_ptr(x)		0
-#define __chk_io_ptr(x)			0
+#define __chk_user_ptr(x)		((void)0)
+#define __chk_io_ptr(x)			((void)0)
 #define __builtin_warning(x, y...)	(1)
 #define __acquires(x)
 #define __releases(x)
-#define __acquire(x)			0
-#define __release(x)			0
+#define __acquire(x)			do { } while (0)
+#define __release(x)			do { } while (0)
 #define __cond_lock(x,c)		(c)
 #define	__bitwise
 #define __devinitdata