From mboxrd@z Thu Jan  1 00:00:00 1970
From: dave.jing.tian@gmail.com (Dave Tian)
Date: Sat, 23 Apr 2016 10:02:25 -0400
Subject: where is __percpu_seg initialized?
In-Reply-To: <tencent_56B238C1379AEEAF6FB608F3@qq.com>
References: <tencent_56B238C1379AEEAF6FB608F3@qq.com>
Message-ID: <181C899F-91C2-4A27-ACE6-E924B5444234@gmail.com>
To: kernelnewbies@lists.kernelnewbies.org
List-Id: kernelnewbies.lists.kernelnewbies.org

load_percpu_segment, which is called by switch_to_new_gdt in setup_per_cpu_areas.

-daveti


> On Apr 23, 2016, at 3:24 AM, ?? <losemyheaven@qq.com> wrote:
> 
> Hi all:
> I knew the kernel implement the per-cpu variable via __percpu_seg. For example on x86 architecture, it's defined as:
> 
> #ifdef CONFIG_X86_64
> #define __percpu_seg		gs
> #define __percpu_mov_op		movq
> #else
> #define __percpu_seg		fs
> #define __percpu_mov_op		movl
> #endif 
>     
> But I'm curious where __percpu_seg is initialized?? I fail to find the relative code. Thanks.
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