From d99c87c8d54a02a229cbeaa19ec8784b1d5afbb9 Mon Sep 17 00:00:00 2001
From: John Baldwin <jhb@FreeBSD.org>
Date: Wed, 15 Sep 2021 09:03:18 -0700
Subject: [PATCH] evdev: Add parentheses around '-' expression in operand of
 '&'.

This fixes a -Wparentheses error with GCC 9.

Reviewed by:	wulf
Differential Revision:	https://reviews.freebsd.org/D31947
---
 sys/dev/evdev/evdev_mt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/dev/evdev/evdev_mt.c b/sys/dev/evdev/evdev_mt.c
index a3cb76cbbdb..1b4ec1233ef 100644
--- a/sys/dev/evdev/evdev_mt.c
+++ b/sys/dev/evdev/evdev_mt.c
@@ -101,7 +101,7 @@ static void	evdev_mt_replay_events(struct evdev_dev *);
 static inline int
 ffc_slot(struct evdev_dev *evdev, slotset_t slots)
 {
-	return (ffs(~slots & (2U << MAXIMAL_MT_SLOT(evdev)) - 1) - 1);
+	return (ffs(~slots & ((2U << MAXIMAL_MT_SLOT(evdev)) - 1)) - 1);
 }
 
 void