linux-kernel - Re: [RFC PATCH kernel] powerpc/stack_protector: Fix external modules building

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Date:   Fri, 11 Jan 2019 16:25:33 +1100
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Alexey Kardashevskiy <aik@...abs.ru>
Cc:     linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        Christophe Leroy <christophe.leroy@....fr>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH kernel] powerpc/stack_protector: Fix external modules building

Masahiro Yamada <yamada.masahiro@...ionext.com> writes:
> On Thu, Jan 10, 2019 at 2:44 PM Alexey Kardashevskiy <aik@...abs.ru> wrote:
...
>> diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
>> index 488c9ed..0492f62 100644
>> --- a/arch/powerpc/Makefile
>> +++ b/arch/powerpc/Makefile
>> @@ -419,7 +419,11 @@ archheaders:
>>  ifdef CONFIG_STACKPROTECTOR
>>  prepare: stack_protector_prepare
>>
>> +ifeq ($(KBUILD_EXTMOD),)
>>  stack_protector_prepare: prepare0
>> +else
>> +stack_protector_prepare:
>> +endif
>
>
> Honestly, I think this is ugly.

Yes I would call it a hack :)

> Do you want me to send an alternative solution?

I don't grok how external modules are built well enough to work out what
the right solution is. So if you can come up with something better that
would be awesome.

cheers