linux-kernel - Re: [RFC PATCH v3] drivercore: Add driver probe deferral mechanism

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Message-ID: <20110927210849.GD3994@ponder.secretlab.ca>
Date:	Tue, 27 Sep 2011 15:08:49 -0600
From:	Grant Likely <grant.likely@...retlab.ca>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Russell King - ARM Linux <linux@....linux.org.uk>,
	Greg Kroah-Hartman <greg@...ah.com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	linux-kernel@...r.kernel.org,
	Manjunath GKondaiah <manjunath.gkondaiah@...aro.org>,
	Dilan Lee <dilee@...dia.com>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [RFC PATCH v3] drivercore: Add driver probe deferral mechanism

On Tue, Sep 27, 2011 at 03:50:36PM +0200, Arnd Bergmann wrote:
> On Monday 26 September 2011, Grant Likely wrote:
> > Actually, in the next iteration, I'm thinking it would be a good idea
> > to create a new #define to only be used by probe deferral.  I want it
> > to be easy to find all the drivers that are using this mechanism
> > without needing to filter all the unrelated hits.  However, this is a
> > kernel-only thing so it is probably not appropriate to add it to
> > include/asm-generic/errno.h.  I could use some guidance/advice as to
> > the best way to handle this.
> 
> include/linux/errno.h already has a bunch of kernel-internal error
> codes that are never supposed to be seen in user space. Just
> add one there, the next free one right now is 517, after
> ERESTART_RESTARTBLOCK.

Okay, will do.  How does EPROBE_DEFER 518 sound?

g.
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