linux-kernel - [PATCH -next] x86: Fix unused variable 'msr

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Message-ID: <20210318080348.151022-1-xuyihang@huawei.com>
Date:   Thu, 18 Mar 2021 16:03:48 +0800
From:   Xu Yihang <xuyihang@...wei.com>
To:     <kys@...rosoft.com>, <haiyangz@...rosoft.com>,
        <sthemmin@...rosoft.com>, <tglx@...utronix.de>, <mingo@...hat.com>,
        <bp@...en8.de>, <x86@...nel.org>
CC:     <linux-hyperv@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <xuyihang@...wei.com>
Subject: [PATCH -next] x86: Fix unused variable 'msr_val' warning

Fixes the following W=1 kernel build warning(s):
arch/x86/hyperv/hv_spinlock.c:28:16: warning: variable ‘msr_val’ set but not used [-Wunused-but-set-variable]
  unsigned long msr_val;

Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Xu Yihang <xuyihang@...wei.com>
---
 arch/x86/hyperv/hv_spinlock.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/hyperv/hv_spinlock.c b/arch/x86/hyperv/hv_spinlock.c
index f3270c1fc48c..67bc15c7752a 100644
--- a/arch/x86/hyperv/hv_spinlock.c
+++ b/arch/x86/hyperv/hv_spinlock.c
@@ -25,7 +25,7 @@ static void hv_qlock_kick(int cpu)
 
 static void hv_qlock_wait(u8 *byte, u8 val)
 {
-	unsigned long msr_val;
+	unsigned long msr_val __maybe_unused;
 	unsigned long flags;
 
 	if (in_nmi())
-- 
2.17.1