linux-kernel - Re: sched: Fix signedness bug in yield

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Message-ID: <20130221232600.GA21754@amt.cnet>
Date:	Thu, 21 Feb 2013 20:26:01 -0300
From:	Marcelo Tosatti <mtosatti@...hat.com>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Shuah Khan <shuahkhan@...il.com>, dan.carpenter@...cle.com,
	peterz@...radead.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	torvalds@...ux-foundation.org
Subject: Re: sched: Fix signedness bug in yield_to()

On Thu, Feb 21, 2013 at 09:56:54AM +0100, Ingo Molnar wrote:
> 
> * Shuah Khan <shuahkhan@...il.com> wrote:
> 
> > On Tue, Feb 19, 2013 at 7:27 PM, Linux Kernel Mailing List
> > <linux-kernel@...r.kernel.org> wrote:
> > > Gitweb:     http://git.kernel.org/linus/;a=commit;h=c3c186403c6abd32e719f005f0af950155a9e54d
> > > Commit:     c3c186403c6abd32e719f005f0af950155a9e54d
> > > Parent:     e0a79f529d5ba2507486d498b25da40911d95cf6
> > > Author:     Dan Carpenter <dan.carpenter@...cle.com>
> > > AuthorDate: Tue Feb 5 14:37:51 2013 +0300
> > > Committer:  Ingo Molnar <mingo@...nel.org>
> > > CommitDate: Tue Feb 5 12:59:29 2013 +0100
> > >
> > >     sched: Fix signedness bug in yield_to()
> > >
> > >     In 7b270f6099 "sched: Bail out of yield_to when source and
> > >     target runqueue has one task" we changed this to store -ESRCH so
> > >     it needs to be signed.
> > 
> > Dan, Ingo,
> > 
> > I can't find the 7b270f6099 "sched: Bail out of yield_to when 
> > source and target runqueue has one task" in the latest Linus's 
> > git. Am I missing something.
> > 
> > The current kenel/sched/core.c doesn't have the code from the
> > associated patch https://patchwork.kernel.org/patch/2016651/
> 
> As per the lkml discussion that one was supposed to go upstream 
> via the KVM tree. Marcelo?

commit c3c186403c6abd32e719f005f0af950155a9e54d
Author: Dan Carpenter <dan.carpenter@...cle.com>
Date:   Tue Feb 5 14:37:51 2013 +0300

    sched: Fix signedness bug in yield_to()
    
    In 7b270f6099 "sched: Bail out of yield_to when source and
    target runqueue has one task" we changed this to store -ESRCH so
    it needs to be signed.
    
    Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
    Cc: Peter Zijlstra <peterz@...radead.org>
    Cc: kbuild@...org
    Cc: Steven Rostedt <rostedt@...dmis.org>
    Cc: Mike Galbraith <efault@....de>
    Link: http://lkml.kernel.org/r/20130205113751.GA20521@elgon.mountain
    Signed-off-by: Ingo Molnar <mingo@...nel.org>

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