linux-kernel - Re: [PATCH] Fix tracing infrastructure to support multiple includes when defining CREATE_TRACE

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Date:	Wed, 23 Dec 2009 13:36:58 -0500
From:	Neil Horman <nhorman@...driver.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	linux-kernel@...r.kernel.org, fweisbec@...il.com, mingo@...hat.com,
	Mathieu Desnoyers <compudj@...stal.dyndns.org>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH] Fix tracing infrastructure to support multiple
	includes when defining CREATE_TRACE_POINTS

On Wed, Dec 23, 2009 at 08:58:33AM -0500, Steven Rostedt wrote:
> On Wed, 2009-12-23 at 07:02 -0500, Neil Horman wrote:
> > On Tue, Dec 22, 2009 at 01:03:59PM -0500, Steven Rostedt wrote:
> > > On Wed, 2009-12-16 at 11:04 -0500, Neil Horman wrote:
> > > 
> > > 
> > > > +#if !defined(_TRACE_NAPI_H_) || defined(TRACE_HEADER_MULTI_READ)
> > > >  #define _TRACE_NAPI_H_
> > > >  
> > > 
> > > Ug, I'm still getting panics because of this. I found out that it's
> > > because napi->dev can be NULL.
> > > 
> > > Here's what I did to solve it:
> > Gahhh, you're right, We had to do the same thing in net-next's commit
> > f2798eb4e01b095f273f4bf40f511c9d69c0e1da.  If you queue to the backlog, the
> > backlog napi instance has no net device and so its null.  This is exactly the
> > right fix.
> 
> OK, I'll update the patch and apply it.
> 
> But this doesn't need to go into 33 correct. We can let it brew for 34?
> 
Yeah, the thing I was depending on it for got NAK'ed anyway, so its just a
straight bugfix + a cleanup of the napi_poll tracepoint.  It can definately wait
until 34.

Thanks!
Neil

> -- Steve
> 
> 
> 
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