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From:   Rusty Russell <rusty@rustcorp.com.au>
To:     Ralf Baechle <ralf@linux-mips.org>,
        David Howells <dhowells@redhat.com>
Cc:     Jonas Gorski <jonas.gorski@gmail.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        linux-kernel@vger.kernel.org, linux-mips@linux-mips.org
Subject: Re: [PATCH] MIPS: Fix module.c build for 32 bit
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On Tue, 14 Aug 2012 17:13:45 +0200, Ralf Baechle <ralf@linux-mips.org> wrote:
> Fixes build failure introduced by "Make most arch asm/module.h files use
> asm-generic/module.h" by moving all the RELA processing code to a
> separate file to be used only for RELA processing on 64-bit kernels.
> 
>   CC      arch/mips/kernel/module.o
> arch/mips/kernel/module.c:250:14: error: 'reloc_handlers_rela' defined but not 
> used [-Werror=unused-variable]
> cc1: all warnings being treated as errors
> 
> make[6]: *** [arch/mips/kernel/module.o] Error 1
> 
> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
> 
> ---
> This is bigger than Jonas' suggested patch but far less #ifdefy.
> A minimal fix would be to add __maybe_unused to the definition of
> reloc_handlers_rela but imho __maybe_unused should be avoided where
> possible.
> 
> I tested this on top of today's -next but ideally to keep bisectability
> it should be applied early in the series before CONFIG_MODULES_USE_ELF_RELA
> is introduced which would require trivial tweaking arch/mips/kernel/Makefile
> tweaking.

OK, as suggested, applied as a separate patch (with a bit of tweaking),
and then modified David's patch to flip the condition in the Makefile.

This will sit in linux-next another cycle.

Cheers,
Rusty.