linux-kernel - Re: [PATCH v2] MIPS: Loongson64: Fix section mismatch warning

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Date:   Tue, 28 Jun 2022 15:28:52 +0800
From:   Huacai Chen <chenhuacai@...nel.org>
To:     Tiezhu Yang <yangtiezhu@...ngson.cn>
Cc:     Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Xuefeng Li <lixuefeng@...ngson.cn>,
        "open list:MIPS" <linux-mips@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Masahiro Yamada <masahiroy@...nel.org>
Subject: Re: [PATCH v2] MIPS: Loongson64: Fix section mismatch warning

Reviewed-by: Huacai Chen <chenhuacai@...nel.org>

On Tue, Jun 28, 2022 at 8:16 AM Tiezhu Yang <yangtiezhu@...ngson.cn> wrote:
>
> Cc Masahiro Yamada <masahiroy@...nel.org>
>
> On 06/27/2022 03:07 PM, Tiezhu Yang wrote:
> > prom_init_numa_memory() is annotated __init and not used by any module,
> > thus don't export it.
> >
> > Remove not needed EXPORT_SYMBOL for prom_init_numa_memory() to fix the
> > following section mismatch warning:
> >
> >   LD      vmlinux.o
> >   MODPOST vmlinux.symvers
> > WARNING: modpost: vmlinux.o(___ksymtab+prom_init_numa_memory+0x0): Section mismatch in reference
> > from the variable __ksymtab_prom_init_numa_memory to the function .init.text:prom_init_numa_memory()
> > The symbol prom_init_numa_memory is exported and annotated __init
> > Fix this by removing the __init annotation of prom_init_numa_memory or drop the export.
> >
> > This is build on Linux 5.19-rc4.
> >
> > Fixes: 6fbde6b492df ("MIPS: Loongson64: Move files to the top-level directory")
> > Signed-off-by: Tiezhu Yang <yangtiezhu@...ngson.cn>
> > ---
> >
> > v2: update the commit message and add Fixes tag
> >
> >  arch/mips/loongson64/numa.c | 1 -
> >  1 file changed, 1 deletion(-)
> >
> > diff --git a/arch/mips/loongson64/numa.c b/arch/mips/loongson64/numa.c
> > index 69a5331..8f61e93 100644
> > --- a/arch/mips/loongson64/numa.c
> > +++ b/arch/mips/loongson64/numa.c
> > @@ -196,7 +196,6 @@ void __init prom_init_numa_memory(void)
> >       pr_info("CP0_PageGrain: CP0 5.1 (0x%x)\n", read_c0_pagegrain());
> >       prom_meminit();
> >  }
> > -EXPORT_SYMBOL(prom_init_numa_memory);
> >
> >  pg_data_t * __init arch_alloc_nodedata(int nid)
> >  {
> >
>
> Hi Masahiro,
>
> Please review this patch, I think it is related with the following
> issue, thank you.
>
> https://lore.kernel.org/lkml/CAHk-=wgcsUU-TNoLS7Q6YF3RCSVAKwNM7gFOwqnPQTiU_oGEWA@mail.gmail.com/
>
> Thanks,
> Tiezhu
>