[issue report] ARM: compile error of frame size

[Geert Uytterhoeven]

Hi Morimoto-san,

On Fri, 18 Jul 2025 at 04:09, Kuninori Morimoto
<kuninori.morimoto.gx at renesas.com> wrote:
> In these days, I got a lot of compile error about frame size on ARM.
> like below.
>
>     ${linux}/lib/maple_tree.c:3818:1: error: the frame size of 1304 bytes is\
>      larger than 1280 bytes [-Werror=frame-larger-than=]
>
> I can avoid these errors by modifing like below
> (The new size is unreliable)
>
>         > grep CONFIG_FRAME_WARN .config
>         CONFIG_FRAME_WARN=2040
>
>         > git diff
>         diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile
>         index d61369b1eabe..c5173bd82380 100644
>         --- a/arch/arm/boot/compressed/Makefile
>         +++ b/arch/arm/boot/compressed/Makefile
>         @@ -80,7 +80,7 @@ libfdt_objs := fdt_rw.o fdt_ro.o fdt_wip.o fdt.o
>
>          ifeq ($(CONFIG_ARM_ATAG_DTB_COMPAT),y)
>          CFLAGS_REMOVE_atags_to_fdt.o += -Wframe-larger-than=${CONFIG_FRAME_WARN}
> -        CFLAGS_atags_to_fdt.o += -Wframe-larger-than=1280
> +        CFLAGS_atags_to_fdt.o += -Wframe-larger-than=2040
>          OBJS   += $(libfdt_objs) atags_to_fdt.o
>          endif
>          ifeq ($(CONFIG_USE_OF),y)
>
>
> Is it known issue ?

Yes it is.  And it is hard to fix, according to the maple_tree maintainer:
https://lore.kernel.org/all/troejyyno7oiokx4njv7cbahwhkvkovlopj2igwlsexxqmrmaj@f3cjalwkpvf6

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org

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when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds