linux-kernel - Re: [PATCH 0/7] convert semaphore to mutex in struct class

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Date:	Fri, 11 Jan 2008 10:40:57 +0800
From:	"Dave Young" <hidave.darkstar@...il.com>
To:	"Greg KH" <gregkh@...e.de>
Cc:	"Stefan Richter" <stefanr@...6.in-berlin.de>,
	James.Bottomley@...senpartnership.com, linux-scsi@...r.kernel.org,
	a.zummo@...ertech.it, peterz@...radead.org, cbou@...l.ru,
	linux-kernel@...r.kernel.org,
	"David Brownell" <david-b@...bell.net>, krh@...hat.com,
	stern@...land.harvard.edu, rtc-linux@...glegroups.com,
	spi-devel-general@...ts.sourceforge.net,
	linux1394-devel@...ts.sourceforge.net, dwmw2@...radead.org,
	davem@...emloft.net, jarkao2@...il.com
Subject: Re: [PATCH 0/7] convert semaphore to mutex in struct class

On Jan 11, 2008 2:39 AM, Greg KH <gregkh@...e.de> wrote:
> On Thu, Jan 10, 2008 at 05:48:43PM +0800, Dave Young wrote:
> > The patches are done on my side, please help to check.
>
> Along with all of the other comments from people, I have a few.
>
> > This is the first one of the series about driver core changes.
> > If this one is accepted and there's no other problem I will post the others for maintainer's review (they need your comment and help because I don't know well about the specific driver logic).
> >
> > Thanks a lot in advance.
> > ---
> >
> > 1. convert class semaphore to mutex.
> > 2. add class iterater functions to encapsulate the detail of class devices/children list iterating :
> >       class_for_each_device
> >       class_find_device
> >       class_for_each_child
> >       class_find_child
>
> No, please create 1 patch per type-of-change.
>
> So in this case you would have a series of patches:
>         1) add the class iterator functions
>         2-n) convert the existing places in the kernel using the
>              class->semaphore to use the new iterator functions
>         n+1) convert class semaphore to mutex, which should only touch
>              the driver core

Thanks,  you are quite right. I will do it when I update the patch next time.

>
> That way everything builds along the way, and it's easy to understand
> and review.
>
> Oh, and please start a new thread when you create a new patch like this
> so it doesn't get burried in people's inboxes...

Will do when the new patch available.

>
> thanks,
>
> greg k-h
>
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