linux-kernel - Re: [PATCH v2] riscv: VMAP_STACK overflow detection thread-safe

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Message-ID: <20221125201326.GA2037421@debug.ba.rivosinc.com>
Date:   Fri, 25 Nov 2022 12:13:26 -0800
From:   Deepak Gupta <debug@...osinc.com>
To:     Guo Ren <guoren@...nel.org>
Cc:     palmer@...belt.com, linux-kernel@...r.kernel.org,
        linux-riscv@...ts.infradead.org, Jisheng Zhang <jszhang@...nel.org>
Subject: Re: [PATCH v2] riscv: VMAP_STACK overflow detection thread-safe

On Thu, Nov 24, 2022 at 05:53:45PM +0800, Guo Ren wrote:
>On Thu, Nov 24, 2022 at 5:48 PM Deepak Gupta <debug@...osinc.com> wrote:
>>
>> index df9444397908..a7da051159cf 100644
>> --- a/arch/riscv/kernel/asm-offsets.c
>> +++ b/arch/riscv/kernel/asm-offsets.c
>> @@ -38,6 +38,7 @@ void asm_offsets(void)
>>         OFFSET(TASK_TI_KERNEL_SP, task_struct, thread_info.kernel_sp);
>>         OFFSET(TASK_TI_USER_SP, task_struct, thread_info.user_sp);
>>
>> +       OFFSET(TASK_TI_CPU_NUM, task_struct, thread_info.cpu);
>Why not TASK_TI_CPU ?
No specific reason.
>
>>         OFFSET(TASK_THREAD_F0,  task_struct, thread.fstate.f[0]);
>>         OFFSET(TASK_THREAD_F1,  task_struct, thread.fstate.f[1]);
>>         OFFSET(TASK_THREAD_F2,  task_struct, thread.fstate.f[2]);