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

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Date:	Thu, 06 Mar 2014 13:13:55 +0000
From:	David Howells <dhowells@...hat.com>
To:	unlisted-recipients:; (no To-header on input)
Cc:	dhowells@...hat.com, Wolfram Sang <wsa@...-dreams.de>,
	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

David Howells <dhowells@...hat.com> wrote:

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

Hmmm... __print_flags() seems to append a string if a flag is set, and doesn't
if it isn't set.  It places a separator between each string.  I would prefer
something that emits a single char per flag or a dash if it isn't present.
Are you okay with that?

David
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