linux-kernel - [PATCH 5.15 067/172] riscv: cpu-hotplug: clear cpu from numa map when teardown

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Date:   Mon, 14 Feb 2022 10:25:25 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Pingfan Liu <kernelfans@...il.com>,
        Palmer Dabbelt <palmer@...osinc.com>
Subject: [PATCH 5.15 067/172] riscv: cpu-hotplug: clear cpu from numa map when teardown

From: Pingfan Liu <kernelfans@...il.com>

commit f40fe31c01445f31253b15bef2412b33ae31093b upstream.

There is numa_add_cpu() when cpus online, accordingly, there should be
numa_remove_cpu() when cpus offline.

Signed-off-by: Pingfan Liu <kernelfans@...il.com>
Fixes: 4f0e8eef772e ("riscv: Add numa support for riscv64 platform")
Cc: stable@...r.kernel.org
[Palmer: Add missing NUMA include]
Signed-off-by: Palmer Dabbelt <palmer@...osinc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 arch/riscv/kernel/cpu-hotplug.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/arch/riscv/kernel/cpu-hotplug.c
+++ b/arch/riscv/kernel/cpu-hotplug.c
@@ -12,6 +12,7 @@
 #include <linux/sched/hotplug.h>
 #include <asm/irq.h>
 #include <asm/cpu_ops.h>
+#include <asm/numa.h>
 #include <asm/sbi.h>
 
 void cpu_stop(void);
@@ -46,6 +47,7 @@ int __cpu_disable(void)
 		return ret;
 
 	remove_cpu_topology(cpu);
+	numa_remove_cpu(cpu);
 	set_cpu_online(cpu, false);
 	irq_migrate_all_off_this_cpu();