netdev - Re: randconfig build error with next-20150302, in drivers/net/ethernet/intel/i40e/i40e

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Message-ID: <1425337434.2409.11.camel@jtkirshe-mobl>
Date:	Mon, 02 Mar 2015 15:03:54 -0800
From:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To:	Jim Davis <jim.epost@...il.com>
Cc:	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-next <linux-next@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	e1000-devel@...ts.sourceforge.net, netdev <netdev@...r.kernel.org>
Subject: Re: randconfig build error with next-20150302, in
 drivers/net/ethernet/intel/i40e/i40e_configfs.c

On Mon, 2015-03-02 at 09:29 -0700, Jim Davis wrote:
> Building with the attached random configuration file,
> 
> drivers/built-in.o: In function `i40e_cfgfs_group_make_item':
> i40e_configfs.c:(.text+0x3df4ce): undefined reference to
> `config_item_init_type_name'
> drivers/built-in.o: In function `i40e_configfs_init':
> (.text+0x3df4ee): undefined reference to `config_group_init'
> drivers/built-in.o: In function `i40e_configfs_init':
> (.text+0x3df50c): undefined reference to `configfs_register_subsystem'
> drivers/built-in.o: In function `i40e_configfs_exit':
> (.text+0x3df52e): undefined reference to `configfs_unregister_subsystem'
> Makefile:939: recipe for target 'vmlinux' failed

We found this issue and already have a patch to resolve the problem.
The issue is that we cannot have configfs as a module when our driver is
compiled into the kernel.  The solution is to use the similar Kconfig
logic we used for PTP (which had the same issue) for configfs.

I should have the patch pushed upstream in the next batch of patches I
push upstream.

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