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

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Message-ID: <20150413124058.GQ23685@linux.vnet.ibm.com>
Date:	Mon, 13 Apr 2015 05:40:58 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Borislav Petkov <bp@...e.de>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: linux-next: build failure after merge of the rcu tree

On Mon, Apr 13, 2015 at 01:34:05PM +0200, Ingo Molnar wrote:
> 
> * Borislav Petkov <bp@...e.de> wrote:
> 
> > On Mon, Apr 13, 2015 at 08:39:17PM +1000, Stephen Rothwell wrote:
> > > Hi Paul,
> > > 
> > > After merging the rcu tree, today's linux-next build (powerpc allnoconfig)
> > > failed like this:
> > > 
> > > init/main.c: In function 'rest_init':
> > > init/main.c:387:2: error: implicit declaration of function 'smpboot_thread_init' [-Werror=implicit-function-declaration]
> > >   smpboot_thread_init();
> > >   ^
> > > 
> > > Caused by commit c55f6e1f6f69 ("cpu: Defer smpboot kthread unparking
> > > until CPU known to scheduler").  The declaration in include/linux/cpu.h
> > > is protected by CONFIG_SMP, its use is not.
> > > 
> > > I have reverted that commit for today.
> > 
> > Thanks for the report Stephen, I know today is the day of b0rked
> > linux-next builds :-(
> > 
> > I think Ingo merged Paul's patch already so here's a fix ontop:
> 
> Yeah, I too triggered that build failure and fixed it locally.

What I get for immediately going to long-term testing.  The scenarios
that trigger this one were of course the last to run.  :-/

Thank you all, and apologies for the hassle!

							Thanx, Paul

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