linux-kernel - Re: [PATCH RESEND 0/3] tracing/mm: Fix suspicious rcu_dereference

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Date:	Tue, 12 May 2015 13:36:01 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Shreyas B Prabhu <shreyas@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org, mingo@...hat.com,
	aneesh.kumar@...ux.vnet.ibm.com, paulmck@...ux.vnet.ibm.com,
	preeti@...ux.vnet.ibm.com, mgorman@...e.de, namhyung@...nel.org,
	lizf@...fujitsu.com, acme@...hat.com
Subject: Re: [PATCH RESEND 0/3] tracing/mm: Fix suspicious
 rcu_dereference_check() usage warnings

On Tue, 12 May 2015 16:03:51 -0400 Steven Rostedt <rostedt@...dmis.org> wrote:

> On Tue, 12 May 2015 12:59:26 +0530
> Shreyas B Prabhu <shreyas@...ux.vnet.ibm.com> wrote:
> 
> > Hi Steven,
> > On closer look, there is no particular maintainer who picks changes to
> > this file. Can you please pick these up?
> 
> Perhaps Andrew Morton?
> 
> No problem, I can take these too.
> 

I grabbed them, thanks.

> +	TP_CONDITION(cpu_online(smp_processor_id())),

Are we sure these can't generate check_preemption_disabled() warnings? 
Is there some reason why all these calls always occur with preemption
disabled?

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