linux-kernel - Re: linux-next: build failure after merge of the ext4 tree

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Message-ID: <20150723172343.GB15778@thunk.org>
Date:	Thu, 23 Jul 2015 13:23:43 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	Tejun Heo <tj@...nel.org>
Subject: Re: linux-next: build failure after merge of the ext4 tree

On Thu, Jul 23, 2015 at 12:49:53PM -0400, Theodore Ts'o wrote:
> > After merging the ext4 tree, today's linux-next build (x86_64
> > allmodconfig) failed like this:
> > 
> > ERROR: "wbc_account_io" [fs/ext4/ext4.ko] undefined!
> > ERROR: "bio_associate_blkcg" [fs/ext4/ext4.ko] undefined!
> > 
> > Caused by commit
> > 
> >   001e4a8775f6 ("ext4: implement cgroup writeback support")
> > 
> > I have used the ext4 tree from next-20150722 for today.
> 
> Ah, I see, we're missing the include files which define the inline
> dummy functions.  I'll fix this in my tree, thanks.

Whoops, correction, the problem is that wbc_account_io() and
bio_asociate_blkcg() need to be exported as symbols.

Tejun, how quickly get you get a fix into linux-next?  Or should I
just drop that patch for now?

						- Ted
						

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