linux-kernel - Re: linux-next: next-20101022 broken with unset CONFIG

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Message-Id: <201010221124.32842.arnd@arndb.de>
Date:	Fri, 22 Oct 2010 11:24:32 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	sedat.dilek@...il.com
Cc:	LKML <linux-kernel@...r.kernel.org>, sfr@...b.auug.org.au,
	Jan Harkes <jaharkes@...cmu.edu>
Subject: Re: linux-next: next-20101022 broken with unset CONFIG_BKL

On Friday 22 October 2010 11:13:23 Sedat Dilek wrote:
> Hi,
> 
> I am trying to compile latest linux-next with unset CONFIG_BKL.
> Yes, one patch is missing from [1] to be able to compile a BKL-free kernel.
> (BTW, the patch needs a trivial fix, see v2 attached to this email.)
> 
> With next-20101022 the build breaks (sorry for the output in German):
> 
> [ build.log ]
> ...
>   LD [M]  fs/ceph/ceph.o
>   LD      fs/coda/built-in.o
>   CC [M]  fs/coda/psdev.o
>   CC [M]  fs/cifs/misc.o
> /home/sd/src/linux-2.6/linux-2.6.36/debian/build/source_i386_none/fs/coda/psdev.c:
> In function ‘coda_psdev_write’:
> /home/sd/src/linux-2.6/linux-2.6.36/debian/build/source_i386_none/fs/coda/psdev.c:140:
> error: implicit declaration of function ‘lock_kernel’
> /home/sd/src/linux-2.6/linux-2.6.36/debian/build/source_i386_none/fs/coda/psdev.c:142:
> error: implicit declaration of function ‘unlock_kernel’
>   CC      block/blk-settings.o
> make[6]: *** [fs/coda/psdev.o] Fehler 1
> make[5]: *** [fs/coda] Fehler 2
> make[5]: *** Warte auf noch nicht beendete Prozesse...
> ...
> 
> Just FYI.
> 

Ok, thanks for the report. There is a patch for coda to remove the BKL.
We discussed it yesterday and I subsequently removed the switch that
disables it on non-BKL configs.

We then agreed to not have the patch included in my series, and Jan's
tree is not part of linux-next.

There are more of these in mainline once Linus pulls my tree, but that
just means that we need to get all the other trees into -rc1 that
remove the BKL from other subsystems, before applying the patch that
lets you build with CONFIG_FILE_LOCKING=y and CONFIG_BKL=n.

Right now, both allyesconfig (with BKL) and allnoconfig (without coda)
work fine, we only get a few really obscure randconfigs breaking.

	Arnd
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