[issue report] ARM: compile error of frame size

[Kuninori Morimoto]

Hi Geert
Cc Liam

Thank you for your feedback

> >         > 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)
(snip)
> Yes it is.  And it is hard to fix, according to the maple_tree maintainer:

Hmm...
Actually I have tried to same solution (= remove or fix the big node), but
noticed there are many such code. My suggested was very simple solution
I guess, but I'm not sure detail of ARM limitation, and/or it can solve all
cases, etc...

But other CPU (like ARM64) doesn't have this issue, so we can follow same
way (= allow large frame) I guess.

Does ARM has some reason which can't use large frame ? If not, do you think
we can allow to use it on ARM ?

Thank you for your help !!

Best regards
---
Kuninori Morimoto