Re: [ACPI] Re: 2.6.10-rc1-mm3: ACPI problem due to un-exported hotplug_path

From: Greg KH
Date: Tue Nov 09 2004 - 19:14:17 EST

On Tue, Nov 09, 2004 at 06:48:17PM -0500, Dmitry Torokhov wrote:
> On Tue, 9 Nov 2004 14:55:02 -0800, Greg KH <greg@xxxxxxxxx> wrote:
> > On Fri, Nov 05, 2004 at 09:18:48PM -0800, Keshavamurthy Anil S wrote:
> > > Also, since you have brought this, I have one another question to you.
> > > Now in the new kernel, I see whenever anybody calls sysdev_register(kobj),
> > > an "ADD" notification is sent. why is this? I would like to call
> > > kobject_hotplug(kobj, ADD) later.
> >
> > This happens when kobject_add() is called. You shouldn't ever need to
> > call kobject_hotplug() for an add event yourself.
> >
> This is not always the case. One might want to postpone ADD event
> until all summpelental object attributes are created. This way userspace
> is presented with object in consistent state.

No, that's a mess. Let userspace wait for those attributes to show up
if they need to. That's what the "wait_for_sysfs" program bundled with
udev is for.


greg k-h
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