linux-kernel - Re: [PATCH] driver core: remove polling for driver_probe

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Date:	Fri, 30 Jan 2009 14:31:31 +0100
From:	Cornelia Huck <cornelia.huck@...ibm.com>
To:	tom.leiming@...il.com
Cc:	kay.sievers@...y.org, greg@...ah.com, arjan@...radead.org,
	linux-kernel@...r.kernel.org, Ming Lei <tom.leiming@...il.com>
Subject: Re: [PATCH] driver core: remove polling for driver_probe_done(v3)

On Fri, 30 Jan 2009 20:48:35 +0800,
tom.leiming@...il.com wrote:

> From: Ming Lei <tom.leiming@...il.com>
> 
> This patch adds a function : driver_wait_probe_done,
> which waits on condition of probing done to replace
> polling for driver_probe_done in fs initialization.
> 
> There is no better way to avoid polling for
> driver_probe_done _and_ existence of the root device,
> so we does not replace the driver_probe_done with
> driver_wait_probe_done in such special case.
> 
> Removing polling in fs initialization may lead to
> a faster boot.
> 
> Signed-off-by: Ming Lei <tom.leiming@...il.com>
> ---
>  drivers/base/dd.c      |   12 ++++++++++++
>  include/linux/device.h |    1 +
>  init/do_mounts.c       |    4 ++--
>  init/do_mounts_md.c    |    3 +--
>  4 files changed, 16 insertions(+), 4 deletions(-)

Looks good and also survived a quick test on my s390 LPAR.
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