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From:   Guo Ren <guoren@kernel.org>
Date:   Fri, 22 May 2020 23:28:25 +0800
Message-ID: <CAJF2gTQj+FzDMM7YNX=iwjpJL3zfuDDua34o+m4pK0rdRYFPwg@mail.gmail.com>
Subject: Re: [PATCH] csky: Fixup calltrace panic
To:     Guenter Roeck <linux@roeck-us.net>
Cc:     Guo Ren <ren_guo@c-sky.com>,
        =?UTF-8?B?556/5LuZ5re8?= <xianmiao_qu@c-sky.com>,
        =?UTF-8?B?5bCa5LqR5rW3?= <yunhai_shang@c-sky.com>,
        Guo Ren <guoren@linux.alibaba.com>, linux-csky@vger.kernel.org,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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Hi,

On Thu, May 21, 2020 at 10:46 PM Guenter Roeck <linux@roeck-us.net> wrote:
> > We tested it with https://github.com/c-sky/gcc (gcc-6.3)
> >
>
> That won't work for me. You really might want to consider
> supporting upstream gcc. I'll try disabling CONFIG_STACKTRACE
> for csky build tests. If that doesn't work, I may have to
> disable affected csky build tests for the time being.
>
> Guenter

Not only CONFIG_STACKTRACE,
Disable FRAME_POINTER (Kernel hacking -> Compile the kernel with frame pointers)

because in Makefile:
ifdef CONFIG_FRAME_POINTER
KBUILD_CFLAGS += -mbacktrace
endif

We'll upstream -mbacktrace to gcc 9 soon, sorry for the confusion. Thx
for your work on maintaining.

-- 
Best Regards
 Guo Ren

ML: https://lore.kernel.org/linux-csky/