linux-kernel - Re: [PATCH] MIPS: fw: arc: add __weak to prom_meminit and prom_free_prom

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Date:   Sun, 5 Apr 2020 18:16:51 +0100 (BST)
From:   "Maciej W. Rozycki" <macro@...ux-mips.org>
To:     Masahiro Yamada <masahiroy@...nel.org>
cc:     linux-kbuild@...r.kernel.org, linux-mips@...ux-mips.org,
        clang-built-linux@...glegroups.com, linux-kernel@...r.kernel.org,
        Jiaxun Yang <jiaxun.yang@...goat.com>,
        Paul Burton <paulburton@...nel.org>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        linux-mips@...r.kernel.org
Subject: Re: [PATCH] MIPS: fw: arc: add __weak to prom_meminit and
 prom_free_prom_memory

On Mon, 6 Apr 2020, Masahiro Yamada wrote:

> As far as I understood, prom_meminit() in arch/mips/fw/arc/memory.c
> is overridden by the one in arch/mips/sgi-ip32/ip32-memory.c if
> CONFIG_SGI_IP32 is enabled.
> 
> The use of EXPORT_SYMBOL in static libraries potentially causes a
> problem for the llvm linker [1]. So, I want to forcibly link lib-y
> objects to vmlinux when CONFIG_MODULES=y.

 It looks to me like a bug in the linker in the handling of the EXTERN 
command.  Why not fix the linker instead?

  Maciej