linux-kernel - Re: [PATCH] kbuild: do not sort after reading modules.order

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Date:   Tue, 13 Dec 2022 05:18:04 +0100
From:   Nicolas Schier <nicolas@...sle.eu>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>
Subject: Re: [PATCH] kbuild: do not sort after reading modules.order

On Sun 11 Dec 2022 18:49:18 GMT, Masahiro Yamada wrote:
> modules.order lists modules in the deterministic order (that is why
> "modules order"), and there is no duplication in the list.

Isn't a subdirectory's modules.order just created by
concatenation of $(obj-m) (w/ respect to mentioned subdirs)?
Thus, "no duplication" seems to be true, as long as there is no obj-m 
containing duplicated entries.  Do we ensure unique entries in obj-m 
only?

Kind regards,
Nicolas

> 
> $(sort ) is pointless.
> 
> Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
> ---
> 
>  scripts/Makefile.modfinal | 2 +-
>  scripts/Makefile.modinst  | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/scripts/Makefile.modfinal b/scripts/Makefile.modfinal
> index 25bedd83644b..4705d32388f3 100644
> --- a/scripts/Makefile.modfinal
> +++ b/scripts/Makefile.modfinal
> @@ -13,7 +13,7 @@ include $(srctree)/scripts/Kbuild.include
>  include $(srctree)/scripts/Makefile.lib
>  
>  # find all modules listed in modules.order
> -modules := $(sort $(shell cat $(MODORDER)))
> +modules := $(shell cat $(MODORDER))
>  
>  __modfinal: $(modules)
>  	@:
> diff --git a/scripts/Makefile.modinst b/scripts/Makefile.modinst
> index a4c987c23750..f4cff42069ad 100644
> --- a/scripts/Makefile.modinst
> +++ b/scripts/Makefile.modinst
> @@ -9,7 +9,7 @@ __modinst:
>  include include/config/auto.conf
>  include $(srctree)/scripts/Kbuild.include
>  
> -modules := $(sort $(shell cat $(MODORDER)))
> +modules := $(shell cat $(MODORDER))
>  
>  ifeq ($(KBUILD_EXTMOD),)
>  dst := $(MODLIB)/kernel
> -- 
> 2.34.1

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