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Date: Mon, 22 Feb 2010 16:36:29 +0300
From: Dan Carpenter <error27@gmail.com>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: LKML <linux-kernel@vger.kernel.org>,
       rt-users <linux-rt-users@vger.kernel.org>, Ingo Molnar <mingo@elte.hu>,
       Steven Rostedt <rostedt@goodmis.org>,
       Peter Zijlstra <peterz@infradead.org>, Carsten Emde <ce@ceag.ch>,
       Clark Williams <williams@redhat.com>,
       Frank Rowand <frank.rowand@am.sony.com>,
       Robin Gareus <robin@gareus.org>, Gregory Haskins <ghaskins@novell.com>,
       Philippe Reynes <philippe.reynes@isismpp.fr>,
       Fernando Lopez-Lezcano <nando@ccrma.Stanford.EDU>,
       Will Schmidt <will_schmidt@vnet.ibm.com>,
       Darren Hart <dvhltc@us.ibm.com>, Jan Blunck <jblunck@suse.de>,
       Sven-Thorsten Dietrich <sdietrich@novell.com>,
       Jon Masters <jcm@redhat.com>, Mark Knecht <markknecht@gmail.com>,
       John Kacur <jkacur@redhat.com>, Nick Piggin <nickpiggin@yahoo.com.au>
Subject: Re: [ANNOUNCE] 2.6.33-rc8-rt1
Message-ID: <20100222133629.GD5416@bicker>
Mail-Followup-To: Dan Carpenter <error27@gmail.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	LKML <linux-kernel@vger.kernel.org>,
	rt-users <linux-rt-users@vger.kernel.org>,
	Ingo Molnar <mingo@elte.hu>, Steven Rostedt <rostedt@goodmis.org>,
	Peter Zijlstra <peterz@infradead.org>, Carsten Emde <ce@ceag.ch>,
	Clark Williams <williams@redhat.com>,
	Frank Rowand <frank.rowand@am.sony.com>,
	Robin Gareus <robin@gareus.org>,
	Gregory Haskins <ghaskins@novell.com>,
	Philippe Reynes <philippe.reynes@isismpp.fr>,
	Fernando Lopez-Lezcano <nando@ccrma.Stanford.EDU>,
	Will Schmidt <will_schmidt@vnet.ibm.com>,
	Darren Hart <dvhltc@us.ibm.com>, Jan Blunck <jblunck@suse.de>,
	Sven-Thorsten Dietrich <sdietrich@novell.com>,
	Jon Masters <jcm@redhat.com>, Mark Knecht <markknecht@gmail.com>,
	John Kacur <jkacur@redhat.com>,
	Nick Piggin <nickpiggin@yahoo.com.au>
References: <alpine.LFD.2.00.0908282326460.19335@localhost.localdomain> <alpine.LFD.2.00.0909152257590.8957@localhost.localdomain> <alpine.LFD.2.00.0909190027400.2889@localhost.localdomain> <alpine.LFD.2.00.0910061210400.2646@localhost.localdomain> <alpine.LFD.2.00.0910141115020.9428@localhost.localdomain> <alpine.LFD.2.00.0911061743210.12138@localhost.localdomain> <alpine.LFD.2.00.0911101326280.2725@localhost.localdomain> <alpine.LFD.2.00.1001212102220.2906@localhost.localdomain> <alpine.LFD.2.00.1002181748460.2811@localhost.localdomain> <alpine.LFD.2.00.1002212322450.2811@localhost.localdomain>
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mm/slab.c
  2117                  kmem_freepages(cachep, addr, *this_cpu);
  2118                  if (OFF_SLAB(cachep)) {
  2119                          if (this_cpu)

	We already dereferenced "this_cpu" two lines earlier. 

  2120                                  __cache_free(cachep->slabp_cache, slabp, this_cpu);
  2121                          else
  2122                                  kmem_cache_free(cachep->slabp_cache, slabp);

regards,
dan carpenter