linux-kernel - Re: [PATCH v2] kbuild: preprocess module linker script

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Date:   Sat, 19 Sep 2020 12:26:01 +0200
From:   Jessica Yu <jeyu@...nel.org>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     linux-kbuild@...r.kernel.org, Will Deacon <will@...nel.org>,
        Albert Ou <aou@...s.berkeley.edu>,
        Anton Ivanov <anton.ivanov@...bridgegreys.com>,
        Arnd Bergmann <arnd@...db.de>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Jeff Dike <jdike@...toit.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Michal Marek <michal.lkml@...kovi.net>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Mackerras <paulus@...ba.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Richard Weinberger <richard@....at>,
        Russell King <linux@...linux.org.uk>,
        Tony Luck <tony.luck@...el.com>, linux-arch@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-ia64@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-m68k@...ts.linux-m68k.org,
        linux-riscv@...ts.infradead.org, linux-um@...ts.infradead.org,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH v2] kbuild: preprocess module linker script

+++ Masahiro Yamada [08/09/20 13:27 +0900]:
>There was a request to preprocess the module linker script like we
>do for the vmlinux one. (https://lkml.org/lkml/2020/8/21/512)
>
>The difference between vmlinux.lds and module.lds is that the latter
>is needed for external module builds, thus must be cleaned up by
>'make mrproper' instead of 'make clean'. Also, it must be created
>by 'make modules_prepare'.
>
>You cannot put it in arch/$(SRCARCH)/kernel/, which is cleaned up by
>'make clean'. I moved arch/$(SRCARCH)/kernel/module.lds to
>arch/$(SRCARCH)/include/asm/module.lds.h, which is included from
>scripts/module.lds.S.
>
>scripts/module.lds is fine because 'make clean' keeps all the
>build artifacts under scripts/.
>
>You can add arch-specific sections in <asm/module.lds.h>.
>
>Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
>Tested-by: Jessica Yu <jeyu@...nel.org>
>Acked-by: Will Deacon <will@...nel.org>

Acked-by: Jessica Yu <jeyu@...nel.org>

Thanks for working on this!