linux-kernel - Re: [PATCH 1/1] Fonts: font_acorn_8x8: Replace discarded const qualifier

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Date:   Mon, 2 Nov 2020 11:09:16 +0000
From:   Lee Jones <lee.jones@...aro.org>
To:     Daniel Vetter <daniel.vetter@...ll.ch>
Cc:     Greg KH <gregkh@...uxfoundation.org>,
        Peilin Ye <yepeilin.cs@...il.com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        stable <stable@...r.kernel.org>,
        Russell King <linux@...linux.org.uk>
Subject: Re: [PATCH 1/1] Fonts: font_acorn_8x8: Replace discarded const
 qualifier

On Mon, 02 Nov 2020, Daniel Vetter wrote:

> On Fri, Oct 30, 2020 at 7:18 PM Lee Jones <lee.jones@...aro.org> wrote:
> >
> > Commit 09e5b3fd5672 ("Fonts: Support FONT_EXTRA_WORDS macros for
> > built-in fonts") introduced the following error when building
> > rpc_defconfig (only this build appears to be affected):
> >
> >  `acorndata_8x8' referenced in section `.text' of arch/arm/boot/compressed/ll_char_wr.o:
> >     defined in discarded section `.data' of arch/arm/boot/compressed/font.o
> >  `acorndata_8x8' referenced in section `.data.rel.ro' of arch/arm/boot/compressed/font.o:
> >     defined in discarded section `.data' of arch/arm/boot/compressed/font.o
> >  make[3]: *** [/scratch/linux/arch/arm/boot/compressed/Makefile:191: arch/arm/boot/compressed/vmlinux] Error 1
> >  make[2]: *** [/scratch/linux/arch/arm/boot/Makefile:61: arch/arm/boot/compressed/vmlinux] Error 2
> >  make[1]: *** [/scratch/linux/arch/arm/Makefile:317: zImage] Error 2
> >
> > The .data section is discarded at link time.  Reinstating
> > acorndata_8x8 as const ensures it is still available after linking.
> >
> > Cc: <stable@...r.kernel.org>
> > Cc: Russell King <linux@...linux.org.uk>
> > Signed-off-by: Lee Jones <lee.jones@...aro.org>
> 
> Shouldn't we add the const to all of them, for consistency?

The thought did cross my mind.  However, I do not see any further
issues which need addressing.  Nor do I have any visibility into what
issues may be caused by doing so.  The only thing I know for sure is
that this patch fixes the compile error pertained to in the commit
message, and I'd like for this fix to be as atomic as possible, as
it's designed to be routed through the Stable/LTS trees.

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
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