Fix for undefined behaviour.

Left shift of 1 by 31 places cannot be represented in type 'int'.

MFC after:	1 week
Sponsored by:	Mellanox Technologies

diff --git a/sys/sys/refcount.h b/sys/sys/refcount.h
index 0ba13754cb02b4ceba45ccfa6cdaae864237363a..f680bd6d565461f993d566c9671caf6a7121ae7b 100644 (file)
--- a/sys/sys/refcount.h
+++ b/sys/sys/refcount.h
@@ -39,7 +39,7 @@
 #define        KASSERT(exp, msg)       /* */
 #endif
 
-#define        REFCOUNT_WAITER                 (1 << 31) /* Refcount has waiter. */
+#define        REFCOUNT_WAITER                 (1U << 31) /* Refcount has waiter. */
 #define        REFCOUNT_SATURATION_VALUE       (3U << 29)
 
 #define        REFCOUNT_SATURATED(val)         (((val) & (1U << 30)) != 0)