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Date:   Wed, 28 Jul 2021 21:39:34 +0800
From:   Jisheng Zhang <jszhang3@mail.ustc.edu.cn>
To:     Changbin Du <changbin.du@gmail.com>
Cc:     Jisheng Zhang <Jisheng.Zhang@synaptics.com>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] riscv: stacktrace: fix dump_backtrace/walk_stackframe
 with NULL task
Message-ID: <20210728213934.5a0ee52e@xhacker>
In-Reply-To: <20210727221656.wq3ponbzhvftfxc5@mail.google.com>
References: <20210627092659.46193-1-changbin.du@gmail.com>
        <20210628134404.4c470112@xhacker.debian>
        <20210727221656.wq3ponbzhvftfxc5@mail.google.com>
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On Wed, 28 Jul 2021 06:16:56 +0800
Changbin Du <changbin.du@gmail.com> wrote:

> On Mon, Jun 28, 2021 at 01:44:04PM +0800, Jisheng Zhang wrote:
> > On Sun, 27 Jun 2021 17:26:59 +0800
> > Changbin Du <changbin.du@gmail.com> wrote:
> > 
> >   
> > > 
> > > 
> > > Some places try to show backtrace with NULL task, and expect the task is
> > > 'current'. For example, dump_stack()->show_stack(NULL,...). So the
> > > stacktrace code should take care of this case.  
> > 
> > I fixed this issue one week ago:
> > 
> > http://lists.infradead.org/pipermail/linux-riscv/2021-June/007258.html  
> 
> I still see this issue on mainline. Is your fix merged? Thanks!

Nope, the fix is missed twice. Palmer has added the fix patch into
fix branch, I help it will be in next rc

Regards