linux-kernel - Re: [PATCH] xtensa: Increase size of gcc stack frame check

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Date:   Sat, 11 Sep 2021 20:05:09 -0700
From:   Max Filippov <jcmvbkbc@...il.com>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Masahiro Yamada <masahiroy@...nel.org>,
        "open list:TENSILICA XTENSA PORT (xtensa)" 
        <linux-xtensa@...ux-xtensa.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Chris Zankel <chris@...kel.net>
Subject: Re: [PATCH] xtensa: Increase size of gcc stack frame check

On Sat, Sep 11, 2021 at 7:52 PM Guenter Roeck <linux@...ck-us.net> wrote:
>
> xtensa frame size is larger than the frame size for almost all other
> architectures. This results in more than 50 "the frame size of <n> is
> larger than 1024 bytes" errors when trying to build xtensa:allmodconfig.
>
> Increase frame size for xtensa to 1536 bytes to avoid compile errors
> due to frame size limits.
>
> Cc: Chris Zankel <chris@...kel.net>
> Cc: Max Filippov <jcmvbkbc@...il.com>
> Signed-off-by: Guenter Roeck <linux@...ck-us.net>
> ---
>  lib/Kconfig.debug | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
> index ed4a31e34098..afad11e57d6b 100644
> --- a/lib/Kconfig.debug
> +++ b/lib/Kconfig.debug
> @@ -346,7 +346,7 @@ config FRAME_WARN
>         int "Warn for stack frames larger than"
>         range 0 8192
>         default 2048 if GCC_PLUGIN_LATENT_ENTROPY
> -       default 1536 if (!64BIT && PARISC)
> +       default 1536 if (!64BIT && (PARISC || XTENSA))
>         default 1024 if (!64BIT && !PARISC)

Shouldn't that line also be changed to
  default 1024 if (!64BIT && !(PARISC || XTENSA))
?

>         default 2048 if 64BIT
>         help
> --
> 2.33.0
>

-- 
Thanks.
-- Max