Re: [PATCH] rcu,ftrace: Fix ftrace recursion

[Steven Rostedt]

On Tue, 29 Sep 2020 16:49:53 +0200
Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:

> On Tue, Sep 29, 2020 at 10:36:20AM -0400, Steven Rostedt wrote:
> 
> > > +notrace bool rcu_is_watching(void)
> > >  {
> > >  	bool ret;
> > >    
> > 
> > I think the patch I suggested is more suitable.  
> 
> Both, with only your patch we'd still take the pointless mcount call,
> which is then pure overhead.

Yep, and I stated the same thing to Paul ;-)

-- Steve