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From: Huacai Chen <chenhc@lemote.com>
To: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: linux-mips@vger.kernel.org, Fuxin Zhang <zhangfx@lemote.com>,
	Zhangjin Wu <wuzhangjin@gmail.com>,
	Huacai Chen <chenhuacai@gmail.com>,
	Jiaxun Yang <jiaxun.yang@flygoat.com>,
	Huacai Chen <chenhc@lemote.com>,
	stable@vger.kernel.org
Subject: [PATCH V2] MIPS: CPU#0 is not hotpluggable
Date: Thu, 16 Jul 2020 18:40:23 +0800	[thread overview]
Message-ID: <1594896024-16624-1-git-send-email-chenhc@lemote.com> (raw)

Now CPU#0 is not hotpluggable on MIPS, so prevent to create /sys/devices
/system/cpu/cpu0/online which confuses some user-space tools.

Cc: stable@vger.kernel.org
Signed-off-by: Huacai Chen <chenhc@lemote.com>
---
 arch/mips/kernel/topology.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/mips/kernel/topology.c b/arch/mips/kernel/topology.c
index cd3e1f8..08ad637 100644
--- a/arch/mips/kernel/topology.c
+++ b/arch/mips/kernel/topology.c
@@ -20,7 +20,7 @@ static int __init topology_init(void)
 	for_each_present_cpu(i) {
 		struct cpu *c = &per_cpu(cpu_devices, i);
 
-		c->hotpluggable = 1;
+		c->hotpluggable = !!i;
 		ret = register_cpu(c, i);
 		if (ret)
 			printk(KERN_WARNING "topology_init: register_cpu %d "
-- 
2.7.0


             reply	other threads:[~2020-07-16 10:38 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-16 10:40 Huacai Chen [this message]
2020-07-25  6:37 ` [PATCH V2] MIPS: CPU#0 is not hotpluggable Huacai Chen
2020-07-25  6:49   ` Greg KH
2020-07-25  6:57     ` Huacai Chen
2020-07-25  7:45       ` Greg KH
2020-07-25  8:29         ` Huacai Chen
2020-07-25  8:57           ` Greg KH
2020-07-26  2:17             ` Jiaxun Yang
2020-07-26  8:25   ` Thomas Bogendoerfer
2020-07-26 11:30     ` Jiaxun Yang
2020-07-26  8:25 ` Thomas Bogendoerfer

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