linux-kernel - [PATCH 04/12] ia64: Replace cpu_down with freeze_secondary

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Date:   Wed, 30 Oct 2019 15:38:29 +0000
From:   Qais Yousef <qais.yousef@....com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Qais Yousef <qais.yousef@....com>, Tony Luck <tony.luck@...el.com>,
        Fenghua Yu <fenghua.yu@...el.com>, linux-ia64@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 04/12] ia64: Replace cpu_down with freeze_secondary_cpus

Use freeze_secondary_cpus() instead of open coding using cpu_down()
directly.

This also prepares to make cpu_up/down a private interface for anything
but the cpu subsystem.

Signed-off-by: Qais Yousef <qais.yousef@....com>
CC: Tony Luck <tony.luck@...el.com>
CC: Fenghua Yu <fenghua.yu@...el.com>
CC: linux-ia64@...r.kernel.org
CC: linux-kernel@...r.kernel.org
---
 arch/ia64/kernel/process.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/arch/ia64/kernel/process.c b/arch/ia64/kernel/process.c
index 968b5f33e725..70b433eafa5c 100644
--- a/arch/ia64/kernel/process.c
+++ b/arch/ia64/kernel/process.c
@@ -647,12 +647,8 @@ cpu_halt (void)
 void machine_shutdown(void)
 {
 #ifdef CONFIG_HOTPLUG_CPU
-	int cpu;
-
-	for_each_online_cpu(cpu) {
-		if (cpu != smp_processor_id())
-			cpu_down(cpu);
-	}
+	/* TODO: Can we use disable_nonboot_cpus()? */
+	freeze_secondary_cpus(smp_processor_id());
 #endif
 #ifdef CONFIG_KEXEC
 	kexec_disable_iosapic();
-- 
2.17.1