linux-kernel - Re: [PATCH -next] fork and exit: need to include iocontext.h

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Message-ID: <20080630183337.GD32211@elte.hu>
Date:	Mon, 30 Jun 2008 20:33:37 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Randy Dunlap <randy.dunlap@...cle.com>
Cc:	linux-next@...r.kernel.org, lkml <linux-kernel@...r.kernel.org>,
	mingo <mingo@...hat.com>, tglx <tglx@...utronix.de>,
	hpa <hpa@...or.com>, akpm <akpm@...ux-foundation.org>,
	Jens Axboe <jens.axboe@...cle.com>
Subject: Re: [PATCH -next] fork and exit: need to include iocontext.h


* Randy Dunlap <randy.dunlap@...cle.com> wrote:

> On Mon, 30 Jun 2008 20:05:06 +0200 Ingo Molnar wrote:
> 
> > 
> > * Randy Dunlap <randy.dunlap@...cle.com> wrote:
> > 
> > > From: Randy Dunlap <randy.dunlap@...cle.com>
> > > 
> > > Fix fork and exit build errors: they need to include iocontext.h:
> > > 
> > > linux-next-20080630/kernel/fork.c: In function 'copy_process':
> > > linux-next-20080630/kernel/fork.c:1237: error: implicit declaration of function 'put_io_context'
> > > linux-next-20080630/kernel/exit.c: In function 'do_exit':
> > > linux-next-20080630/kernel/exit.c:992: error: implicit declaration of function 'exit_io_context'
> > 
> > i havent seen this one - do you know by chance which commit triggers it?
> 
> 
> Sorry, no idea which commit.
> 
> In 50 randconfigs today (next-20080630), I saw this one 12 times.

btw., block.git would be one of my first guesses - Jens Cc:-ed.

normally there's an easy way to find out the source commit of build 
failures. Try something like:

 git-bisect reset
 git-bisect start
 git-bisect good v2.6.26-rc8
 git-bisect bad linux-next/master
 git-bisect run make kernel/fork.o

... this should lead you to the commit that broke the build 
automatically. (as long as everyone keeps make oldconfig compatibility)

	Ingo
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