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* powerpc/pci: Don't use bitfield for force_32bit_msiAnton Blanchard2013-08-141-1/+1
| | | | | | | Fix a sparse warning about force_32bit_msi being a one bit bitfield. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/eeh: Keep PE during hotplugGavin Shan2013-07-241-1/+0
| | | | | | | | | | | | | | | | When we do normal hotplug, the PE (shadow EEH structure) shouldn't be kept around. However, we need to keep it if the hotplug an artifial one caused by EEH errors recovery. Since we remove EEH device through the PCI hook pcibios_release_device(), the flag "purge_pe" passed to various functions is meaningless. So the patch removes the meaningless flag and introduce new flag "EEH_PE_KEEP" to save the PE while doing hotplug during EEH error recovery. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: Make radeon 32-bit MSI quirk work on powernvBenjamin Herrenschmidt2013-05-241-0/+2
| | | | | | | | | This moves the quirk itself to pci_64.c as to get built on all ppc64 platforms (the only ones with a pci_dn), factors the two implementations of get_pdn() into a single pci_get_dn() and use the quirk to do 32-bit MSIs on IODA based powernv platforms. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/pci: Support per-aperture memory offsetBenjamin Herrenschmidt2013-05-061-5/+1
| | | | | | | | | | | | | | | | | The PCI core supports an offset per aperture nowadays but our arch code still has a single offset per host bridge representing the difference betwen CPU memory addresses and PCI MMIO addresses. This is a problem as new machines and hypervisor versions are coming out where the 64-bit windows will have a different offset (basically mapped 1:1) from the 32-bit windows. This fixes it by using separate offsets. In the long run, we probably want to get rid of that intermediary struct pci_controller and have those directly stored into the pci_host_bridge as they are parsed but this will be a more invasive change. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/pseries: Force 32 bit MSIs for devices that require itBrian King2013-05-061-0/+2
| | | | | | | | | | | The following patch implements a new PAPR change which allows the OS to force the use of 32 bit MSIs, regardless of what the PCI capabilities indicate. This is required for some devices that advertise support for 64 bit MSIs but don't actually support them. Signed-off-by: Brian King <brking@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/fsl-pci Make PCIe hotplug work with Freescale PCIe controllersRojhalat Ibrahim2013-04-101-0/+6
| | | | | | | | | | Up to now the PCIe link status on Freescale PCIe controllers was only checked once at boot time. So hotplug did not work. With this patch the link status is checked on every config read. PCIe devices not present at boot time are found after doing 'echo 1 >/sys/bus/pci/rescan'. Signed-off-by: Rojhalat Ibrahim <imr@rtschenk.de> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* powerpc/fsl-pci: Keep PCI SoC controller registers in pci_controllerKumar Gala2013-04-101-1/+4
| | | | | | | | | Move to keeping the SoC registers that control and config the PCI controllers on FSL SoCs in the pci_controller struct. This allows us to not need to ioremap() the registers in multiple different places that use them. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* powerpc/eeh: Fix crash on converting OF node to edevGavin Shan2012-09-181-0/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The kernel crash was reported by Alexy. He was testing some feature with private kernel, in which Alexy added some code in pci_pm_reset() to read the CSR after writting it. The bug could be reproduced on Fiber Channel card (Fibre Channel: Emulex Corporation Saturn-X: LightPulse Fibre Channel Host Adapter (rev 03)) by the following commands. # echo 1 > /sys/devices/pci0004:01/0004:01:00.0/reset # rmmod lpfc # modprobe lpfc The history behind the test case is that those additional config space reading operations in pci_pm_reset() would cause EEH error, but we didn't detect EEH error until "modprobe lpfc". For the case, all the PCI devices on PCI bus (0004:01) were removed and added after PE reset. Then the EEH devices would be figured out again based on the OF nodes. Unfortunately, there were some child OF nodes under PCI device (0004:01:00.0), but they didn't have attached PCI_DN since they're invisible from PCI domain. However, we were still trying to convert OF node to EEH device without checking on the attached PCI_DN. Eventually, it caused the kernel crash as follows: Unable to handle kernel paging request for data at address 0x00000030 Faulting instruction address: 0xc00000000004d888 cpu 0x0: Vector: 300 (Data Access) at [c000000fc797b950] pc: c00000000004d888: .eeh_add_device_tree_early+0x78/0x140 lr: c00000000004d880: .eeh_add_device_tree_early+0x70/0x140 sp: c000000fc797bbd0 msr: 8000000000009032 dar: 30 dsisr: 40000000 current = 0xc000000fc78d9f70 paca = 0xc00000000edb0000 softe: 0 irq_happened: 0x00 pid = 2951, comm = eehd enter ? for help [c000000fc797bc50] c00000000004d848 .eeh_add_device_tree_early+0x38/0x140 [c000000fc797bcd0] c00000000004d848 .eeh_add_device_tree_early+0x38/0x140 [c000000fc797bd50] c000000000051b54 .pcibios_add_pci_devices+0x34/0x190 [c000000fc797bde0] c00000000004fb10 .eeh_reset_device+0x100/0x160 [c000000fc797be70] c0000000000502dc .eeh_handle_event+0x19c/0x300 [c000000fc797bf00] c000000000050570 .eeh_event_handler+0x130/0x1a0 [c000000fc797bf90] c000000000020138 .kernel_thread+0x54/0x70 The patch changes of_node_to_eeh_dev() and just returns NULL if the passed OF node doesn't have attached PCI_DN. Cc: stable@vger.kernel.org Reported-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/eeh: Remove EEH PE for normal PCI hotplugGavin Shan2012-09-181-0/+1
| | | | | | | | | | | | | | Function eeh_rmv_from_parent_pe() could be called by the path of either normal PCI hotplug, or EEH recovery. For the former case, we need purge the corresponding PE on removal of the associated PE bus. The patch tries to cover that by passing more information to function pcibios_remove_pci_devices() so that we know if the corresponding PE needs to be purged or be marked as "invalid". Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/eeh: Trace eeh device from I/O cacheGavin Shan2012-09-101-0/+2
| | | | | | | | | | | | | | | The idea comes from Benjamin Herrenschmidt. The eeh cache helps fetching the pci device according to the given I/O address. Since the eeh cache is serving for eeh, it's reasonable for eeh cache to trace eeh device except pci device. The patch make eeh cache to trace eeh device. Also, the major eeh entry function eeh_dn_check_failure has been renamed to eeh_dev_check_failure since it will take eeh device as input parameter. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/PCI: register busn_res for root busesYinghai Lu2012-06-131-0/+1
| | | | | | | | | | | | Add the host bridge bus number aperture to the resource list. Like the MMIO and I/O port apertures, this is used when assigning resources to hot-added devices or in the case of conflicts. [bhelgaas: changelog] CC: Paul Mackerras <paulus@samba.org> CC: linuxppc-dev@lists.ozlabs.org CC: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
* powerpc/eeh: Remove eeh information from pci_dnGavin Shan2012-03-281-8/+0
| | | | | | | | | | | The patch removes the eeh information from pci_dn since the eeh device (struct eeh_dev) already contained those information and the copy in pci_dn is no longer used except for the pseries iommu mapping code, which we change to retrieve the PE address from eeh device instead. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/eeh: Remove eeh device from OF nodeGavin Shan2012-03-281-0/+8
| | | | | | | | | | | | Originally, the PCI sensitive OF node is tracing the eeh device through struct device_node->edev. However, it was regarded as bad idea. The patch removes struct device_node->edev and uses PCI_DN to trace the corresponding eeh device according to BenH's comments. Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* Merge branch 'linux-next' of ↵Linus Torvalds2012-01-121-1/+0
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci * 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci: (80 commits) x86/PCI: Expand the x86_msi_ops to have a restore MSIs. PCI: Increase resource array mask bit size in pcim_iomap_regions() PCI: DEVICE_COUNT_RESOURCE should be equal to PCI_NUM_RESOURCES PCI: pci_ids: add device ids for STA2X11 device (aka ConneXT) PNP: work around Dell 1536/1546 BIOS MMCONFIG bug that breaks USB x86/PCI: amd: factor out MMCONFIG discovery PCI: Enable ATS at the device state restore PCI: msi: fix imbalanced refcount of msi irq sysfs objects PCI: kconfig: English typo in pci/pcie/Kconfig PCI/PM/Runtime: make PCI traces quieter PCI: remove pci_create_bus() xtensa/PCI: convert to pci_scan_root_bus() for correct root bus resources x86/PCI: convert to pci_create_root_bus() and pci_scan_root_bus() x86/PCI: use pci_scan_bus() instead of pci_scan_bus_parented() x86/PCI: read Broadcom CNB20LE host bridge info before PCI scan sparc32, leon/PCI: convert to pci_scan_root_bus() for correct root bus resources sparc/PCI: convert to pci_create_root_bus() sh/PCI: convert to pci_scan_root_bus() for correct root bus resources powerpc/PCI: convert to pci_create_root_bus() powerpc/PCI: split PHB part out of pcibios_map_io_space() ... Fix up conflicts in drivers/pci/msi.c and include/linux/pci_regs.h due to the same patches being applied in other branches.
| * powerpc/PCI: make pcibios_setup_phb_resources() staticBjorn Helgaas2012-01-061-1/+0
| | | | | | | | | | | | CC: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* | powerpc/powernv: PCI support for p7IOC under OPAL v2Benjamin Herrenschmidt2011-11-251-1/+5
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | This adds support for p7IOC (and possibly other IODA v1 IO Hubs) using OPAL v2 interfaces. We completely take over resource assignment and assign them using an algorithm that hands out device BARs in a way that makes them fit in individual segments of the M32 window of the bridge, which enables us to assign individual PEs to devices and functions. The current implementation gives out a PE per functions on PCIe, and a PE for the entire bridge for PCIe to PCI-X bridges. This can be adjusted / fine tuned later. We also setup DMA resources (32-bit only for now) and MSIs (both 32-bit and 64-bit MSI are supported). The DMA allocation tries to divide the available 256M segments of the 32-bit DMA address space "fairly" among PEs. This is done using a "weight" heuristic which assigns less value to things like OHCI USB controllers than, for example SCSI RAID controllers. This algorithm will probably want some fine tuning for specific devices or device types. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* Merge branch 'next/cross-platform' of ↵Linus Torvalds2011-07-271-49/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/arm/linux-arm-soc * 'next/cross-platform' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/linux-arm-soc: ARM: Consolidate the clkdev header files ARM: set vga memory base at run-time ARM: convert PCI defines to variables ARM: pci: make pcibios_assign_all_busses use pci_has_flag ARM: remove unnecessary mach/hardware.h includes pci: move microblaze and powerpc pci flag functions into asm-generic powerpc: rename ppc_pci_*_flags to pci_*_flags Fix up conflicts in arch/microblaze/include/asm/pci-bridge.h
| * pci: move microblaze and powerpc pci flag functions into asm-genericRob Herring2011-07-121-49/+1
| | | | | | | | | | | | | | | | | | | | | | | | Move separate microblaze and powerpc pci flag functions pci_set_flags, pci_add_flags, and pci_has_flag into asm-generic/pci-bridge.h so other archs can use them. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Michal Simek <monstr@monstr.eu>
| * powerpc: rename ppc_pci_*_flags to pci_*_flagsRob Herring2011-07-121-16/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This renames pci flags functions and enums in preparation for creating generic version in asm-generic/pci-bridge.h. The following search and replace is done: s/ppc_pci_/pci_/ s/PPC_PCI_/PCI_/ Direct accesses to ppc_pci_flag variable are replaced with helper functions. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org>
* | pci/of: Consolidate pci_bus_to_OF_node()Benjamin Herrenschmidt2011-06-081-5/+0
| | | | | | | | | | | | | | | | | | | | The generic code always get the device-node in the right place now so a single implementation will work for all archs Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Michal Simek <monstr@monstr.eu> Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* | pci/of: Consolidate pci_device_to_OF_node()Benjamin Herrenschmidt2011-06-081-5/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | All archs do more or less the same thing now, move it into a single generic place. I chose pci.h rather than of_pci.h to avoid having to change all call-sites to include the later. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Michal Simek <monstr@monstr.eu> Acked-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* | pci/of: Match PCI devices to OF nodes dynamicallyBenjamin Herrenschmidt2011-06-081-24/+11
|/ | | | | | | | | | | | | | | | | | | | | | | | powerpc has two different ways of matching PCI devices to their corresponding OF node (if any) for historical reasons. The ppc64 one does a scan looking for matching bus/dev/fn, while the ppc32 one does a scan looking only for matching dev/fn on each level in order to be agnostic to busses being renumbered (which Linux does on some platforms). This removes both and instead moves the matching code to the PCI core itself. It's the most logical place to do it: when a pci_dev is created, we know the parent and thus can do a single level scan for the matching device_node (if any). The benefit is that all archs now get the matching for free. There's one hook the arch might want to provide to match a PHB bus to its device node. A default weak implementation is provided that looks for the parent device device node, but it's not entirely reliable on powerpc for various reasons so powerpc provides its own. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Michal Simek <monstr@monstr.eu> Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* Fix common misspellingsLucas De Marchi2011-03-311-1/+1
| | | | | | Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
* powerpc/pci: Make both ppc32 and ppc64 use sysdata for pci_controllerGrant Likely2011-02-041-22/+5
| | | | | | | | | | | | Currently, ppc32 uses sysdata for the pci_controller pointer, and ppc64 uses it to hold the device_node pointer. This patch moves the of_node pointer into (struct pci_bus*)->dev.of_node and (struct pci_dev*)->dev.of_node so that sysdata can be converted to always use the pci_controller pointer instead. It also fixes up the allocating of pci devices so that the of_node pointer gets assigned consistently and increments the ref count. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* of/pci: move of_irq_map_pci() into generic codeSebastian Andrzej Siewior2011-02-041-0/+10
| | | | | | | | | | | There is a tiny difference between PPC32 and PPC64. Microblaze uses the PPC32 variant. Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc> [grant.likely@secretlab.ca: Added comment to #endif, moved documentation block to function implementation, fixed for non ppc and microblaze compiles] Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* of/address: merge of_address_to_resource()Grant Likely2010-07-061-5/+0
| | | | | | | | | | | | | Merge common code between PowerPC and Microblaze. This patch also moves the prototype of pci_address_to_pio() out of pci-bridge.h and into prom.h because the only user of pci_address_to_pio() is of_address_to_resource(). Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> CC: Michal Simek <monstr@monstr.eu> CC: Stephen Rothwell <sfr@canb.auug.org.au>
* powerpc/pci: Pull ppc32 PCI features into commonKumar Gala2009-08-281-19/+16
| | | | | | | | | | | | | | | | | Some of the PCI features we have in ppc32 we will need on ppc64 platforms in the future. These include support for: * ppc_md.pci_exclude_device * indirect config cycles * early config cycles We also simplified the logic in fake_pci_bus() to assume it will always get a valid pci_controller. Since all current callers seem to pass it one. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/pci: move pci_64.c device tree scanning code into pci-common.cGrant Likely2009-08-281-5/+0
| | | | | | | | | | | | | | | | The PCI device tree scanning code in pci_64.c is some useful functionality. It allows PCI devices to be described in the device tree instead of being probed for, which in turn allows pci devices to use all of the device tree facilities to describe complex PCI bus architectures like GPIO and IRQ routing (perhaps not a common situation for desktop or server systems, but useful for embedded systems with on-board PCI devices). This patch moves the device tree scanning into pci-common.c so it is available for 32-bit powerpc machines too. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/pci: Cleanup some minor cruftKumar Gala2009-05-211-6/+0
| | | | | | | | | | * Removed building setup-irq on ppc32, we don't use it anymore * Remove duplicate prototype for setup_grackle() code that needs it gets it from <asm/grackle.h> * Removed gratuitous pci_io_size type differences between ppc32/ppc64 Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc/pci: Move pseries code into pseries platform specific areaKumar Gala2009-05-211-0/+1
| | | | | | | | | There doesn't appear to be any specific reason that we need to setup the pseries specific notifier in generic arch pci code. Move it into pseries land. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* powerpc: make dma_window_* in pci_controller struct avail on 32bBecky Bruce2009-05-191-2/+4
| | | | | | | | | | | | | | | | Also, convert them to resource_size_t (which is unsigned long on 64-bit, so it's not a change there). We will be using these on fsl 32b to indicate the start and size address of memory that the pci controller can actually reach - this is needed to determine if an address requires bounce buffering. For now, initialize them to a standard value; in the near future, the value will be calculated based on how the inbound windows are programmed. Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org> Acked-by: Ben Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* powerpc: Introduce ppc_pci_flags accessorsJosh Boyer2008-12-161-1/+25
| | | | | | | | | | | | | Currently there are a number of platforms that open code access to the ppc_pci_flags global variable. However, that variable is not present if CONFIG_PCI is not set, which can lead to a build break. This introduces a number of accessor functions that are defined to be empty in the case of CONFIG_PCI being disabled. The various platform files in the kernel are updated to use these. Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* powerpc/pci: Fix various pseries PCI hotplug issuesBenjamin Herrenschmidt2008-11-051-3/+0
| | | | | | | | | | | | | The pseries PCI hotplug code has a number of issues, ranging from incorrect resource setup to crashes, depending on what is added, when, whether it contains a bridge, etc etc.... This fixes a whole bunch of these, while actually simplifying the code a bit, using more generic code in the process and factoring out common code between adding of a PHB, a slot or a device. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* powerpc/pci: Use common PHB resource hookupBenjamin Herrenschmidt2008-11-051-0/+1
| | | | | | | | | | | | | | | | | | | The 32-bit and 64-bit powerpc PCI code used to set up the resource pointers of the root bus of a given PHB in completely different places. This unifies this in large part, by making 32-bit use a routine very similar to what 64-bit does when initially scanning the PCI busses. The actual setup of the PHB resources itself is then moved to a common function in pci-common.c. This should cause no functional change on 64-bit. On 32-bit, the effect is that the PHB resources are going to be setup a bit earlier, instead of being setup from pcibios_fixup_bus(). Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* powerpc/PCI: Add legacy PCI access via sysfsBenjamin Herrenschmidt2008-10-201-0/+7
| | | | | | | | This patch adds support for legacy_io and legacy_mem files in bus class directories in sysfs for powerpc Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
* powerpc: Move include files to arch/powerpc/include/asmStephen Rothwell2008-08-041-0/+302
from include/asm-powerpc. This is the result of a mkdir arch/powerpc/include/asm git mv include/asm-powerpc/* arch/powerpc/include/asm Followed by a few documentation/comment fixups and a couple of places where <asm-powepc/...> was being used explicitly. Of the latter only one was outside the arch code and it is a driver only built for powerpc. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
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