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Re: [PATCH 2.5] r4k_switch task_struct/thread_info fixes

To: Jun Sun <>
Subject: Re: [PATCH 2.5] r4k_switch task_struct/thread_info fixes
From: Vivien Chappelier <>
Date: Fri, 7 Feb 2003 10:29:16 +0100 (CET)
Cc: Ralf Baechle <>,
In-reply-to: <>
Original-recipient: rfc822;
On Thu, 6 Feb 2003, Jun Sun wrote:

> Actually the following hunks are not right.  ST_OFF
> should be applied against the task_struct, which is a0,
> not thread_info (t3).

In 2.4 yes, not in 2.5.

> union thread_union {
>         struct thread_info thread_info;
>         unsigned long stack[INIT_THREAD_SIZE/sizeof(long)];
> };

That means the top of the stack is actually at (task->thread_info +
KERNEL_STACK_SIZE) in 2.5. See for example arch/mips64/kernel/ptrace.c:107

> Also see my next email before you rush into trying :-)

Ok, I'll look at it later.


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