linux-kernel - Re: [PATCH 2/2] i2c: Add message transfer tracepoints for SMBUS

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Message-ID: <20140228212134.GC2517@katana>
Date:	Fri, 28 Feb 2014 22:21:35 +0100
From:	Wolfram Sang <wsa@...-dreams.de>
To:	David Howells <dhowells@...hat.com>
Cc:	wolfram@...-dreams.de, khali@...ux-fr.org,
	linux-i2c@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] i2c: Add message transfer tracepoints for SMBUS


> > Also, the I2C tracing has first 'f' then 'a', that should be consistent,
> > too.
> 
> Flags first or address first?  Do you have a preference (for both)?

I'd say address first, yet no strong preference.

> > Can we have something like this for 'flags'?
> 
> There's a __print_flags() which should work.  One thing I'm concerned about
> there is how do we handle more flags being added - does that count as an ABI
> break if the printed format changes?

Not sure, I mean, this is debug output, no?

> SMBus flags are basically the same as I2C flags, right?

Basically, yes.

Thanks,

   Wolfram


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