diff --git a/sys/compat/linuxkpi/common/include/linux/kernel.h b/sys/compat/linuxkpi/common/include/linux/kernel.h
--- a/sys/compat/linuxkpi/common/include/linux/kernel.h
+++ b/sys/compat/linuxkpi/common/include/linux/kernel.h
@@ -103,7 +103,7 @@
 #define	_O_CTASSERT(x)		_O__CTASSERT(x, __LINE__)
 #define	_O__CTASSERT(x, y)	_O___CTASSERT(x, y)
 #define	_O___CTASSERT(x, y)	while (0) { \
-    typedef char __assert_line_ ## y[(x) ? 1 : -1]; \
+    typedef char __unused __assert_line_ ## y[(x) ? 1 : -1]; \
     __assert_line_ ## y _x; \
     _x[0] = '\0'; \
 }
diff --git a/sys/compat/linuxkpi/common/include/linux/spinlock.h b/sys/compat/linuxkpi/common/include/linux/spinlock.h
--- a/sys/compat/linuxkpi/common/include/linux/spinlock.h
+++ b/sys/compat/linuxkpi/common/include/linux/spinlock.h
@@ -128,6 +128,7 @@
 } while (0)
 
 #define	spin_unlock_irqrestore(_l, flags) do {		\
+	(void)(flags);					\
 	spin_unlock(_l);				\
 } while (0)