Messages in this thread | | | Date | Sun, 4 Jan 2009 17:58:30 -0800 | From | Arjan van de Ven <> | Subject | Re: [PATCH 4/4] fastboot: make ACPI bus drivers probe asynchronous |
| |
On Mon, 05 Jan 2009 10:03:12 +0800 Zhao Yakui <yakui.zhao@intel.com> wrote:
> On Sun, 2009-01-04 at 09:31 -0800, Arjan van de Ven wrote: > > From 20af3efd07b775a27a997e3df1039e20ea18f62b Mon Sep 17 00:00:00 > > 2001 From: Arjan van de Ven <arjan@linux.intel.com> > > Date: Sun, 4 Jan 2009 05:32:28 -0800 > > Subject: [PATCH] fastboot: make ACPI bus drivers probe asynchronous > > > > the various ACPI bus drivers have non-overlapping devices and can > > each be run asynchronous. Some of the ACPI drivers (especially the > > battery one, but others as well) can take quite a long time to > > probe. > It seems that all the ACPI drivers are registered asynchronously after > this change.
they are registered asynchronously compared to the rest of the kernel, but in strict original sequence compared to eachother.
> > +static void acpi_bus_register_async(void *data, async_cookie_t > > cookie) +{ > > + int ret; > > + struct acpi_driver *driver = data; > > + driver->drv.name = driver->name; > > + driver->drv.bus = &acpi_bus_type; > > + driver->drv.owner = driver->owner; > > + > > + async_synchronize_cookie(cookie); > > + > > + ret = driver_register(&driver->drv); > > + WARN_ON(ret != 0); > > +}
because of the async_synchronize_cookie() call!
-- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for power savings, visit http://www.lesswatts.org
| |