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From: YueHaibing <yuehaibing@huawei.com>
To: <catalin.marinas@arm.com>, <will@kernel.org>
Cc: <linux-arm-kernel@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>,
	YueHaibing <yuehaibing@huawei.com>
Subject: [PATCH -next] arm64: Fix -Wunused-function warning
Date: Fri, 18 Sep 2020 20:33:18 +0800	[thread overview]
Message-ID: <20200918123318.23764-1-yuehaibing@huawei.com> (raw)

If CONFIG_HOTPLUG_CPU is n, gcc warns:

arch/arm64/kernel/smp.c:967:13: warning: ‘ipi_teardown’ defined but not used [-Wunused-function]
 static void ipi_teardown(int cpu)
             ^~~~~~~~~~~~

Use #ifdef guard this.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
---
 arch/arm64/kernel/smp.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
index b6bde2675ccc..82e75fc2c903 100644
--- a/arch/arm64/kernel/smp.c
+++ b/arch/arm64/kernel/smp.c
@@ -82,9 +82,9 @@ static int nr_ipi __read_mostly = NR_IPI;
 static struct irq_desc *ipi_desc[NR_IPI] __read_mostly;
 
 static void ipi_setup(int cpu);
-static void ipi_teardown(int cpu);
 
 #ifdef CONFIG_HOTPLUG_CPU
+static void ipi_teardown(int cpu);
 static int op_cpu_kill(unsigned int cpu);
 #else
 static inline int op_cpu_kill(unsigned int cpu)
@@ -964,6 +964,7 @@ static void ipi_setup(int cpu)
 		enable_percpu_irq(ipi_irq_base + i, 0);
 }
 
+#ifdef CONFIG_HOTPLUG_CPU
 static void ipi_teardown(int cpu)
 {
 	int i;
@@ -974,6 +975,7 @@ static void ipi_teardown(int cpu)
 	for (i = 0; i < nr_ipi; i++)
 		disable_percpu_irq(ipi_irq_base + i);
 }
+#endif
 
 void __init set_smp_ipi_range(int ipi_base, int n)
 {
-- 
2.17.1


WARNING: multiple messages have this Message-ID (diff)
From: YueHaibing <yuehaibing@huawei.com>
To: <catalin.marinas@arm.com>, <will@kernel.org>
Cc: YueHaibing <yuehaibing@huawei.com>,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH -next] arm64: Fix -Wunused-function warning
Date: Fri, 18 Sep 2020 20:33:18 +0800	[thread overview]
Message-ID: <20200918123318.23764-1-yuehaibing@huawei.com> (raw)

If CONFIG_HOTPLUG_CPU is n, gcc warns:

arch/arm64/kernel/smp.c:967:13: warning: ‘ipi_teardown’ defined but not used [-Wunused-function]
 static void ipi_teardown(int cpu)
             ^~~~~~~~~~~~

Use #ifdef guard this.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
---
 arch/arm64/kernel/smp.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
index b6bde2675ccc..82e75fc2c903 100644
--- a/arch/arm64/kernel/smp.c
+++ b/arch/arm64/kernel/smp.c
@@ -82,9 +82,9 @@ static int nr_ipi __read_mostly = NR_IPI;
 static struct irq_desc *ipi_desc[NR_IPI] __read_mostly;
 
 static void ipi_setup(int cpu);
-static void ipi_teardown(int cpu);
 
 #ifdef CONFIG_HOTPLUG_CPU
+static void ipi_teardown(int cpu);
 static int op_cpu_kill(unsigned int cpu);
 #else
 static inline int op_cpu_kill(unsigned int cpu)
@@ -964,6 +964,7 @@ static void ipi_setup(int cpu)
 		enable_percpu_irq(ipi_irq_base + i, 0);
 }
 
+#ifdef CONFIG_HOTPLUG_CPU
 static void ipi_teardown(int cpu)
 {
 	int i;
@@ -974,6 +975,7 @@ static void ipi_teardown(int cpu)
 	for (i = 0; i < nr_ipi; i++)
 		disable_percpu_irq(ipi_irq_base + i);
 }
+#endif
 
 void __init set_smp_ipi_range(int ipi_base, int n)
 {
-- 
2.17.1


_______________________________________________
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             reply	other threads:[~2020-09-18 12:33 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-18 12:33 YueHaibing [this message]
2020-09-18 12:33 ` [PATCH -next] arm64: Fix -Wunused-function warning YueHaibing
2020-09-18 16:01 ` Marc Zyngier
2020-09-18 16:01   ` Marc Zyngier
2020-10-11 17:57 ` [tip: irq/core] arm64: Fix -Wunused-function warning when !CONFIG_HOTPLUG_CPU tip-bot2 for YueHaibing

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