linux-kernel - Re: linux-next: build failure after merge of the final tree (wireless tree related)

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Date:	Thu, 22 Dec 2011 17:57:17 +0100
From:	Michal Marek <mmarek@...e.cz>
To:	Stephen Rothwell <sfr@...b.auug.org.au>,
	Kalle Valo <kvalo@....qualcomm.com>
Cc:	"John W. Linville" <linville@...driver.com>,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	Rusty Russell <rusty@...tcorp.com.au>
Subject: Re: linux-next: build failure after merge of the final tree (wireless
 tree related)

Dne 22.12.2011 06:58, Stephen Rothwell napsal(a):
> Hi ,
> 
> After merging the final tree, today's linux-next build (powerpc
> allyesconfig) failed like this:
> 
> drivers/net/wireless/ath/ath6kl/cfg80211.c:27:1: error: expected ')' before 'KBUILD_MODNAME'
> drivers/net/wireless/ath/ath6kl/cfg80211.c:27:1: error: 'KBUILD_MODNAME' undeclared here (not in a function)
[...]
> 
> I can't figure out what goes wrong here.  On the compile command line,
> KBUILD_MODNAME is not defined, but KBUILD_BASE_NAME is.

scripts/Makefile.lib says
# Note: It's possible that one object gets potentially linked into more
#       than one module. In that case KBUILD_MODNAME will be set to foo_bar,
#       where foo and bar are the name of the modules.

but reality does not match this comment:
modname_flags  = $(if $(filter 1,$(words $(modname))),\
                 -D"KBUILD_MODNAME=KBUILD_STR($(call name-fix,$(modname)))")

But I wonder why you need to link all the object files twice? Usually,
drivers have a foo_common.ko and foo_{usb,pci,whatever}.ko that provide
the pci/usb/whatever driver.

Michal
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