linux-kernel - Re: [PATCH linux-next] ARM: unwind: use ex_frame with CONFIG_UNWINDER_FRAME

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Date:   Mon, 29 May 2023 11:46:40 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     guo.ziliang@....com.cn
Cc:     linux@...linux.org.uk, rmk+kernel@...linux.org.uk,
        lihuafei1@...wei.com, broonie@...nel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re:  [PATCH linux-next] ARM: unwind: use ex_frame with CONFIG_UNWINDER_FRAME_POINTER

On Thu, May 18, 2023 at 10:58 AM <guo.ziliang@....com.cn> wrote:

> From: guo ziliang <guo.ziliang@....com.cn>
>
> We define ex_frame with CONFIG_UNWINDER_FRAME_POINTER in struct stackframe,
> struct stackframe
> {
>         ......
> #ifdef CONFIG_UNWINDER_FRAME_POINTER
>     bool ex_frame;
> #endif
> };
> but we just use ex_frame without CONFIG_UNWINDER_FRAME_POINTER in
> return_address() and unwind_frame().
> Maybe we should fix it.
>
> Signed-off-by: guo ziliang <guo.ziliang@....com.cn>

Looks reasonable:
Acked-by: Linus Walleij <linus.walleij@...aro.org>

Is it possible to create a .config which expose this problem?
Then mention in the commit message "if you select A and B
then compilation fails..."

Yours,
Linus Walleij