Re: [PATCH V2 15/16] MIPS: Loongson 3: Add CPU Hotplug support. -- Linux for MIPS


Re: [PATCH V2 15/16] MIPS: Loongson 3: Add CPU Hotplug support.
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To: Huacai Chen <chenhuacai@xxxxxxxxx>
Subject: Re: [PATCH V2 15/16] MIPS: Loongson 3: Add CPU Hotplug support.
From: Yong Zhang <yong.zhang@xxxxxxxxxxxxx>
Date: Tue, 19 Jun 2012 17:32:00 +0800
Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx>, <linux-mips@xxxxxxxxxxxxxx>, Fuxin Zhang <zhangfx@xxxxxxxxxx>, Zhangjin Wu <wuzhangjin@xxxxxxxxx>, Huacai Chen <chenhc@xxxxxxxxxx>, Hongliang Tao <taohl@xxxxxxxxxx>, Hua Yan <yanh@xxxxxxxxxx>
In-reply-to: <1340088624-25550-16-git-send-email-chenhc@lemote.com>
Reply-to: Yong Zhang <yong.zhang@xxxxxxxxxxxxx>
User-agent: Mutt/1.5.21 (2010-09-15)

On Tue, Jun 19, 2012 at 02:50:23PM +0800, Huacai Chen wrote:
> +#ifdef CONFIG_HOTPLUG_CPU
> +
> +static DEFINE_SPINLOCK(smp_reserve_lock);

Do you really need this lock?

Thanks,
Yong

References:
- [PATCH V2 00/14] MIPS: Add Loongson-3 based machines support.
  - From: Huacai Chen
- [PATCH V2 15/16] MIPS: Loongson 3: Add CPU Hotplug support.
  - From: Huacai Chen

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