linux-kernel - Re: [PATCH 07/12] n_tracerouter and n

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Date:	Thu, 24 Feb 2011 11:52:29 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	james_p_freyensee@...ux.intel.com
Cc:	Greg KH <greg@...ah.com>, Alan Cox <alan@...ux.intel.com>,
	gregkh@...e.de, linux-kernel@...r.kernel.org,
	suhail.ahmed@...el.com
Subject: Re: [PATCH 07/12] n_tracerouter and n_tracesink additions.

> > > +#define N_TRACESINK	23	/* Trace data routing for MIPI P1149.7 */
> > > +#define N_TRACEROUTER	24	/* Trace data routing for MIPI P1149.7 */
> > 
> > Two new ones?  Really?  Alan, no objection from you on this?
> 
> I'll let Alan chime in, but I did have Alan review this code before I
> submitted here.

There isn't really an elegant way of avoiding that. What probably does
want doing for a final merge is to make them more generic. So that
anything can be a source or a sink that meets a basic interface.

Then you'd be able to do

	set ldisc to tracesink
	ioctl (something or other) 		"attach to sink of
						 name 'modem/mipi/p1149.7'

or similar.

That would need a struct of some sort and a register_sink/unregister_sink
method. Ditto for tracerouter. Obviously for now only the current drivers
would support it but the interface is then there for anything else

Alan
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