linux-kernel - Re: [PATCH] iwlwifi: remove object duplication in Makefile

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Date:   Tue, 7 Jan 2020 02:11:17 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     Johannes Berg <johannes@...solutions.net>
Cc:     Emmanuel Grumbach <emmanuel.grumbach@...el.com>,
        Luca Coelho <luciano.coelho@...el.com>,
        Intel Linux Wireless <linuxwifi@...el.com>,
        linux-wireless@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Kalle Valo <kvalo@...eaurora.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Networking <netdev@...r.kernel.org>
Subject: Re: [PATCH] iwlwifi: remove object duplication in Makefile

On Tue, Jan 7, 2020 at 12:51 AM Johannes Berg <johannes@...solutions.net> wrote:
>
> On Mon, 2020-01-06 at 16:54 +0900, Masahiro Yamada wrote:
> > The objects in $(iwlwifi-objs) $(iwlwifi-y) $(iwlwifi-m) are linked to
> > iwlwifi.ko .
> >
> > This line adds $(iwlwifi-m) to iwlwifi-objs, so the objects from
> > $(iwlwifi-m) are listed twice as the dependency of the module.
>
> Are you sure? We have
>
> obj-$(CONFIG_IWLWIFI)   += iwlwifi.o
>
> and then "iwlwifi-y += ...", but I was under the impression that
> iwlwifi.o didn't really pick up iwlwifi-m automatically, that's not
> something that you'd normally do, normally -m only makes sense to build
> a module using "obj-m", just here we do it for the mvm sub level
> stuff...
>
> johannes
>

I made a mistake.

iwlwifi-m is automatically handled since commit
cf4f21938e13ea1533ebdcb21c46f1d998a44ee8
but cfg/*.o objects are not liked to vmlinux
under the following combination:

CONFIG_IWLWIFI=y
CONFIG_IWLDVM=m
CONFIG_IWLMVM=m


Please ignore this patch.

Perhaps, I may come back to this patch,
but I need to change scripts/Makefile.lib beforehand.


-- 
Best Regards
Masahiro Yamada