linux-kernel - Re: [PATCH] ftrace: Remove use of control list and ops

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Message-ID: <20151202145032.GA5255@krava.brq.redhat.com>
Date:	Wed, 2 Dec 2015 15:50:32 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH] ftrace: Remove use of control list and ops

On Wed, Dec 02, 2015 at 09:27:00AM -0500, Steven Rostedt wrote:
> On Wed, 2 Dec 2015 09:58:26 +0100
> Jiri Olsa <jolsa@...hat.com> wrote:
> 
> > On Tue, Dec 01, 2015 at 11:56:55AM -0500, Steven Rostedt wrote:
> > 
> > SNIP
> > 
> > > -static void ftrace_ops_recurs_func(unsigned long ip, unsigned long parent_ip,
> > > +static void ftrace_ops_assist_func(unsigned long ip, unsigned long parent_ip,
> > >  				   struct ftrace_ops *op, struct pt_regs *regs)
> > >  {
> > >  	int bit;
> > >  
> > > +	if ((op->flags & FTRACE_OPS_FL_RCU) && !rcu_is_watching())
> > > +		return;
> > > +
> > >  	bit = trace_test_and_set_recursion(TRACE_LIST_START, TRACE_LIST_MAX);
> > >  	if (bit < 0)
> > >  		return;
> > >  
> > > -	op->func(ip, parent_ip, op, regs);
> > > +	preempt_disable_notrace();
> > >  
> > > +	if (!(op->flags & FTRACE_OPS_FL_PER_CPU) ||
> > > +	    ftrace_function_local_disabled(op)) {  
> > 
> > should be !ftrace_function_local_disabled(op) in here,
> > I passed my test with attached patch
> > 
> 
> Can you retest with this patch:

sure, but other than the declaration removal it's the same change

jirka
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