linux-kernel - Re: [PATCH RESEND] x86/process: directly use try_get_task_stack() return value in get

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Message-ID: <YVWbL1TbfuxnznxV@hirez.programming.kicks-ass.net>
Date:   Thu, 30 Sep 2021 13:10:39 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Jisheng Zhang <Jisheng.Zhang@...aptics.com>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        x86@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH RESEND] x86/process: directly use try_get_task_stack()
 return value in get_wchan

On Thu, Sep 30, 2021 at 06:52:29PM +0800, Jisheng Zhang wrote:
> try_get_task_stack() has already properly gets target task's stack,
> no need to call task_stack_page() again.

Please see:

  https://lkml.kernel.org/r/20210929220218.691419-1-keescook@chromium.org

Whichever way around, this code doesn't live much longer.