linux-kernel - Re: [RFC 0/8] Introducing a generic AMP/IPC framework

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Date:	Wed, 22 Jun 2011 15:05:32 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	"Ohad Ben-Cohen" <ohad@...ery.com>
Cc:	linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, akpm@...ux-foundation.org,
	Brian Swetland <swetland@...gle.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	"davinci-linux-open-source" 
	<davinci-linux-open-source@...ux.davincidsp.com>,
	Rusty Russell <rusty@...tcorp.com.au>
Subject: Re: [RFC 0/8] Introducing a generic AMP/IPC framework

On Wednesday 22 June 2011, Ohad Ben-Cohen wrote:
> > One point I noticed is the use of debugfs, which you should probably
> > replace at some point with a stable API, e.g. your own debugfs-like
> > file system, but there is no hurry to do that now.
> 
> debugfs is only being used to expose debugging info (namely the power
> state of the remote processor and its trace log messages), which is
> mostly useful for developers trying to understand what went wrong.
> 
> It seems like debugfs fits quite nicely here (e.g. it's perfectly fine
> if this is completely compiled out on production systems), but sure,
> we can always revisit this later too.

Ok, I see. In that case I agree that using debugfs is fine, but I would
recommend trying to use fewer macros and just open-coding the file
operations for better readability.

> > Unfortunately require __packed. It would be better to sort the members
> > differently so that each member is naturally aligned in order to
> > avoid the need for padding or __packed attributes
> 
> Definitely. __packed is being used just to be on the safe side; we
> didn't intend to introduce unnatural alignment intentionally. will be
> fixed.

Ok.

	Arnd
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