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

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Date:   Mon, 06 Jan 2020 16:51:25 +0100
From:   Johannes Berg <johannes@...solutions.net>
To:     Masahiro Yamada <masahiroy@...nel.org>,
        Emmanuel Grumbach <emmanuel.grumbach@...el.com>,
        Luca Coelho <luciano.coelho@...el.com>,
        Intel Linux Wireless <linuxwifi@...el.com>,
        linux-wireless@...r.kernel.org
Cc:     "David S. Miller" <davem@...emloft.net>,
        Kalle Valo <kvalo@...eaurora.org>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH] iwlwifi: remove object duplication in Makefile

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