linux-kernel - i2c-designware-core: KBUILD_MODNAME undeclared [was: Build regressions/improvements in v3.6-rc1]

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Date:	Wed, 15 Aug 2012 22:01:38 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
CC:	linux-kernel@...r.kernel.org, dirk.brandewie@...il.com,
	khali@...ux-fr.org, linux-i2c@...r.kernel.org,
	Michal Marek <mmarek@...e.cz>, linux-kbuild@...r.kernel.org,
	jbaron@...hat.com, ben-linux@...ff.org,
	Jiri Slaby <jirislaby@...il.com>
Subject: i2c-designware-core: KBUILD_MODNAME undeclared [was: Build regressions/improvements
 in v3.6-rc1]

On 08/04/2012 11:24 AM, Geert Uytterhoeven wrote:
> Below is the list of build error/warning regressions/improvements in
> v3.6-rc1[1] compared to v3.5[2].
...
>   + drivers/i2c/busses/i2c-designware-core.c: error: 'KBUILD_MODNAME' undeclared (first use in this function):

This is a real problem we are facing here. It happens on PPC when all
I2C_DESIGNWARE_PLATFORM, I2C_DESIGNWARE_PCI and DYNAMIC_DEBUG are set.

It's because i2c-designware-core.c is used in two modules
(i2c-designware-platform and i2c-designware-pci) and KBUILD_MODNAME is
not defined for those because (scripts/Makefile.lib):
# $(modname_flags) #defines KBUILD_MODNAME as the name of the module
# it will end up in (or would, if it gets compiled in)
# Note: Files that end up in two or more modules are compiled
#       without the KBUILD_MODNAME definition. The reason is
#       that any made-up name would differ in different configs.

But DYNAMIC_DEBUG needs KBUILD_MODNAME for dev_dbg used in that source.

Any ideas? Why is it not a separate module for example?

thanks,
-- 
js
suse labs
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