Date: Thu, 16 Feb 2012 21:58:09 +0400
From: Cyrill Gorcunov <gorcunov@openvz.org>
To: Oleg Nesterov <oleg@redhat.com>
Cc: Vasiliy Kulikov <segoon@openwall.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        "Eric W. Biederman" <ebiederm@xmission.com>,
        Pavel Emelyanov <xemul@parallels.com>,
        Andrey Vagin <avagin@openvz.org>,
        KOSAKI Motohiro <kosaki.motohiro@gmail.com>,
        Ingo Molnar <mingo@elte.hu>, "H. Peter Anvin" <hpa@zytor.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Glauber Costa <glommer@parallels.com>,
        Andi Kleen <andi@firstfloor.org>, Tejun Heo <tj@kernel.org>,
        Matt Helsley <matthltc@us.ibm.com>, Pekka Enberg <penberg@kernel.org>,
        Eric Dumazet <eric.dumazet@gmail.com>,
        Alexey Dobriyan <adobriyan@gmail.com>, Valdis.Kletnieks@vt.edu,
        Michal Marek <mmarek@suse.cz>,
        Frederic Weisbecker <fweisbec@gmail.com>, linux-kernel@vger.kernel.org
Subject: Re: + syscalls-x86-add-__nr_kcmp-syscall-v8.patch added to -mm tree
Message-ID: <20120216175809.GJ1905@moon>
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 <20120215200533.GQ1894@moon>
 <20120215202538.GK4533@moon>
 <20120215210934.GL4533@moon>
 <20120215215807.GM4533@moon>
 <20120216144954.GA11953@redhat.com>
 <20120216151340.GI1905@moon>
 <20120216164901.GD3849@moon>
 <20120216174047.GA31176@redhat.com>
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On Thu, Feb 16, 2012 at 06:40:47PM +0100, Oleg Nesterov wrote:
> On 02/16, Cyrill Gorcunov wrote:
> >
> > -static void access_unlock(struct task_struct *task)
> > +static void kcmp_unlock(struct mutex *m1, struct mutex *m2)
> >  {
> > -	mutex_unlock(&task->signal->cred_guard_mutex);
> > +	if (m2 > m1)
> > +		swap(m1, m2);
> 
> Well, the order doesn't matter in case of _unlock, you can remove
> this part. Not that it really hurts though, I won't argue.
> 

It drops some instructions so I think it worth removing (still
unlocking not in reverse order is something which always make
me nervious ;)

	Cyrill
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