From efa0b1307d359fc5e1577e767ab964bfc4bbe94a Mon Sep 17 00:00:00 2001
From: hselasky <hselasky@FreeBSD.org>
Date: Thu, 12 Sep 2019 15:57:49 +0000
Subject: [PATCH] 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
---
 sys/sys/refcount.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/sys/refcount.h b/sys/sys/refcount.h
index 0ba13754cb0..f680bd6d565 100644
--- 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)
-- 
2.39.5