linux-kernel - Re: [PATCH 6/9] block: add block_touch

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Date:	Wed, 11 Jan 2012 09:58:20 -0800
From:	Tejun Heo <tj@...nel.org>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	axboe@...nel.dk, mingo@...hat.com, fweisbec@...il.com,
	teravest@...gle.com, slavapestov@...gle.com, ctalbott@...gle.com,
	dhsharp@...gle.com, linux-kernel@...r.kernel.org,
	winget@...gle.com, namhyung@...il.com
Subject: Re: [PATCH 6/9] block: add block_touch_buffer tracepoint

On Wed, Jan 11, 2012 at 12:42:01PM -0500, Steven Rostedt wrote:
> On Tue, 2012-01-10 at 10:28 -0800, Tejun Heo wrote:
> >  
> >  #define CREATE_TRACE_POINTS
> >  #include <trace/events/block.h>
> > diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h
> > index 458f497..245caed 100644
> > --- a/include/linux/buffer_head.h
> > +++ b/include/linux/buffer_head.h
> > @@ -13,6 +13,7 @@
> >  #include <linux/pagemap.h>
> >  #include <linux/wait.h>
> >  #include <linux/atomic.h>
> > +#include <trace/events/block.h>
> 
> trace/events/x.h in a header can cause issue if this header is ever
> included in another trace/events/x.h header. I think I'll need to write
> a patch that allows this, but it wont be pretty.

Hmmm... I see.  I'll make touch_buffer() a function.

Thanks.

-- 
tejun
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