linux-kernel - [PATCH] arm64: kernel: Make IPI_WAKEUP under control of CONFIG_ARM64_ACPI_PARKING

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Message-ID: <20210119140609.106420-1-chenjun102@huawei.com>
Date:   Tue, 19 Jan 2021 14:06:09 +0000
From:   Chen Jun <chenjun102@...wei.com>
To:     <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
CC:     <catalin.marinas@....com>, <will@...nel.org>,
        <lorenzo.pieralisi@....com>, <rui.xiang@...wei.com>,
        <guohanjun@...wei.com>, <houtao1@...wei.com>
Subject: [PATCH] arm64: kernel: Make IPI_WAKEUP under control of CONFIG_ARM64_ACPI_PARKING_PROTOCOL

since commit 5e89c55e4ed81d7abb1ce8828db35fa389dc0e90
("arm64: kernel: implement ACPI parking protocol")

On arm64, IPI 6 will be wasted without setting
CONFIG_ARM64_ACPI_PARKING_PROTOCOL.

Signed-off-by: Chen Jun <chenjun102@...wei.com>
---
 arch/arm64/kernel/smp.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
index ad00f99ee9b0..8b494ad1c61e 100644
--- a/arch/arm64/kernel/smp.c
+++ b/arch/arm64/kernel/smp.c
@@ -73,7 +73,9 @@ enum ipi_msg_type {
 	IPI_CPU_CRASH_STOP,
 	IPI_TIMER,
 	IPI_IRQ_WORK,
+#ifdef CONFIG_ARM64_ACPI_PARKING_PROTOCOL
 	IPI_WAKEUP,
+#endif
 	NR_IPI
 };
 
@@ -795,7 +797,9 @@ static const char *ipi_types[NR_IPI] __tracepoint_string = {
 	[IPI_CPU_CRASH_STOP]	= "CPU stop (for crash dump) interrupts",
 	[IPI_TIMER]		= "Timer broadcast interrupts",
 	[IPI_IRQ_WORK]		= "IRQ work interrupts",
+#ifdef CONFIG_ARM64_ACPI_PARKING_PROTOCOL
 	[IPI_WAKEUP]		= "CPU wake-up interrupts",
+#endif
 };
 
 static void smp_cross_call(const struct cpumask *target, unsigned int ipinr);
-- 
2.25.0