linux-kernel - Re: [PATCH] kbuild: fix the modules order between drivers and libs

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Date:   Wed, 17 Aug 2022 23:58:33 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>
Cc:     Michal Marek <michal.lkml@...kovi.net>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] kbuild: fix the modules order between drivers and libs

On Sun, Aug 14, 2022 at 8:10 AM Masahiro Yamada <masahiroy@...nel.org> wrote:
>
> Commit b2c885549122 ("kbuild: update modules.order only when contained
> modules are updated") accidentally changed the modules order.
>
> Prior to that commit, the modules order was determined based on
> vmlinux-dirs, which lists core-y/m, drivers-y/m, libs-y/m, in this order.
>
> Now, subdir-modorder lists them in a different order: core-y/m, libs-y/m,
> drivers-y/m.
>
> Presumably, there was no practical issue because the modules in drivers
> and libs are orthogonal, but there is no reason to have this distortion.
>
> Get back to the original order.
>
> Fixes: b2c885549122 ("kbuild: update modules.order only when contained modules are updated")
> Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
> ---


Applied to linux-kbuild/fixes.


>
>  Makefile | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/Makefile b/Makefile
> index 5f5c43a52455..c4e06e8020f1 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -1113,13 +1113,11 @@ vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \
>                      $(patsubst %/,%,$(filter %/, $(core-) \
>                         $(drivers-) $(libs-))))
>
> -subdir-modorder := $(addsuffix modules.order,$(filter %/, \
> -                       $(core-y) $(core-m) $(libs-y) $(libs-m) \
> -                       $(drivers-y) $(drivers-m)))
> -
>  build-dirs     := $(vmlinux-dirs)
>  clean-dirs     := $(vmlinux-alldirs)
>
> +subdir-modorder := $(addsuffix /modules.order, $(build-dirs))
> +
>  # Externally visible symbols (used by link-vmlinux.sh)
>  KBUILD_VMLINUX_OBJS := $(head-y) $(patsubst %/,%/built-in.a, $(core-y))
>  KBUILD_VMLINUX_OBJS += $(addsuffix built-in.a, $(filter %/, $(libs-y)))
> --
> 2.34.1
>


-- 
Best Regards
Masahiro Yamada