From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arjan van de Ven Subject: Re: [PATCH 4/4] fastboot: make ACPI bus drivers probe asynchronous Date: Sun, 4 Jan 2009 17:58:30 -0800 Message-ID: <20090104175830.7a7e279e@infradead.org> References: <20090104092430.7ffd2c41@infradead.org> <20090104093103.46167d23@infradead.org> <1231120992.3967.18.camel@yakui_zhao.sh.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1231120992.3967.18.camel@yakui_zhao.sh.intel.com> Sender: linux-scsi-owner@vger.kernel.org To: Zhao Yakui Cc: "linux-kernel@vger.kernel.org" , "torvalds@linux-foundation.org" , "mingo@elte.hu" , "fweisbec@gmail.com" , "linux-scsi@vger.kernel.org" , "linux-ide@vger.kernel.org" , "linux-acpi@vger.kernel.org" , "akpm@linux-foundation.org" List-Id: linux-acpi@vger.kernel.org On Mon, 05 Jan 2009 10:03:12 +0800 Zhao Yakui 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 > > 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