linux-kernel - Re: linux-next: build failure after merge of the block tree

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Message-ID: <r2kaf41c7c41004142223m1464fd07u5617fe7332cb2ea@mail.gmail.com>
Date:	Wed, 14 Apr 2010 22:23:25 -0700
From:	Divyesh Shah <dpshah@...gle.com>
To:	Stephen Rothwell <sfr@...b.auug.org.au>
Cc:	Jens Axboe <jens.axboe@...cle.com>, linux-next@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Gui Jianfeng <guijianfeng@...fujitsu.com>
Subject: Re: linux-next: build failure after merge of the block tree

On Wed, Apr 14, 2010 at 7:42 PM, Stephen Rothwell <sfr@...b.auug.org.au> wrote:
> Hi Jens,
>
> After merging the block tree, today's linux-next build (x86_64
> allmodconfig) failed like this:
>
> ERROR: "get_gendisk" [block/blk-cgroup.ko] undefined!
> ERROR: "sched_clock" [block/blk-cgroup.ko] undefined!

Hi Stephen,
     These errors seem to show up because the 2 symbols aren't
exported and hence when building as a module we don't have access to
these symbols. I'll send a patch to fix that shortly. Sorry for the
build breakage.

-Divyesh

>
> Probably caused by commits 34d0f179d6dd711d3fc13c0820a456c59aae8048
> ("io-controller: Add a new interface "weight_device" for IO-Controller"),
> 9195291e5f05e01d67f9a09c756b8aca8f009089 ("blkio: Increment the blkio
> cgroup stats for real now") and 812df48d127365ffd0869aa139738f572a86759c
> ("blkio: Add more debug-only per-cgroup stats").
>
> I have used the version of the block tree from next-20100414 for today.
> --
> Cheers,
> Stephen Rothwell                    sfr@...b.auug.org.au
> http://www.canb.auug.org.au/~sfr/
>
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