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2005-09-01[PATCH] Fix bug in ppc64 dynamic hugepage supportDavid Gibson
In adjusting the logic for SLB miss for the dynamic hugepage stuff, I messed up the !CONFIG_HUGETLB_PAGE case, failing to set the SLB flags properly. This fixes it. It also streamlines the logic for the HUGETLB_PAGE case (removing a couple of branches) while we're at it. Booted, and roughly tested on POWER5 (with and without HUGETLB_PAGE), iSeries/RS64 (no hugepage available), and G5 (with and without HUGETLB_PAGE). Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-08-30[PATCH] Remove nested feature sectionsDavid Gibson
The {BEGIN,END}_FTR_SECTION asm macros used in ppc64 to nop out sections of code at runtime cannot be nested. However, we do nest them in hash_low.S. We get away with it there, because there is nothing between the BEGIN markers for each section. However, that's confusing to someone reading the code. This patch removes the nested ifset and ifclr feature sections, replacing them with a single feature section in the full mask/value form. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-30[PATCH] ppc64: lparconfig.c memory leakJoel Schopp
This patch fixes a rare memory leak found by Coverity. Signed-off-by: Joel Schopp <jschopp@austin.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-30[PATCH] ppc64: of_device.c remove useless codeJoel Schopp
Coverity found more unused code. Signed-off-by: Joel Schopp <jschopp@austin.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-30[PATCH] ppc64: Add CONFIG_HZAnton Blanchard
While ppc64 has the CONFIG_HZ Kconfig option, it wasnt actually being used. Connect it up and set all platforms to 250Hz. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-30[PATCH] oprofile PVR 970MPJake Moilanen
Here's the 970MP's PVR (processor version register) entry for oprofile. Signed-off-by: Jake Moilanen <moilanen@austin.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-30[PATCH] PPC64: Don't try to claim memory from OF at 1GB markOlof Johansson
Some RS64-based machines (p620, F80, others) have problems with firmware returning 0xdeadbeef instead of failure to allocations that end at the 1GB mark. We have two options: 1. Detect the undocumented 0xdeadbeef return value and interpret it as a failure. 2. Avoid allocating that high. (2) is really the cleaner solution here. 768MB is plenty of room so use that as the max alloc_top instead of 1GB. Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-30[PATCH] Create include/asm-powerpcStephen Rothwell
The ppc and ppc64 trees are hopefully going to merge over time, so this patch begins the process by creating a place for the merging of the header files. Create include/asm-powerpc (and move linkage.h into it from asm-{ppc,ppc64} since we don't like empty directories). Modify the ppc and ppc64 Makefiles to cope. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-30[PATCH] Make MODULE_DEVICE_TABLE work for vio devicesStephen Rothwell
Make MODULE_DEVICE_TABLE work for vio devices. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-30[PATCH] Create vio_bus_opsStephen Rothwell
Create vio_bus_ops so that we just pass a structure to vio_bus_init instead of three separate function pointers. Rearrange vio.h to avoid forward references. vio.h only needs struct device_node from prom.h so remove the include and just declare it. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-30[PATCH] Create vio_register_deviceStephen Rothwell
Take some assignments out of vio_register_device_common and rename it to vio_register_device. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-30[PATCH] Formatting changes to vio.cStephen Rothwell
Formatting changes to vio.c to bring it closer to the kernel coding standard. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-30[PATCH] fix iSeries build for gcc-3.4Stephen Rothwell
gcc 3.4 (at least the build we are using) puts the gcc generated .ident string into a .note section at the end of the files it compiles (gcc 3.3.3-hammer and gcc 4.0.2 Debian puts it in the .text section). This means that the lparmap.s file we produce in the iSeries build may end with a .note section. When we include it into head.S, the assembler can no longer resolve some of the conditional branches since the target label ends up too far away. This patch just forces us back to the .text section after including lparmap.s. The breakage was caused by my patch "iSeries build with newer assemblers and compilers" (sha1-id: 2ad56496627630ebc99f06af5f81ca23e17e014e). Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-30[PATCH] Restore lparmap.s include for iSeriesDavid Gibson
A mistake rebasing the series of ppc64 head.S cleanup patches meant the #include of lparmap.s, needed for iSeries was lost. This patch puts it back again. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29Merge HEAD from master.kernel.org:/pub/scm/linux/kernel/git/paulus/ppc64-2.6 Linus Torvalds
2005-08-29[PATCH] convert signal handling of NODEFER to act like other Unix boxes.Steven Rostedt
It has been reported that the way Linux handles NODEFER for signals is not consistent with the way other Unix boxes handle it. I've written a program to test the behavior of how this flag affects signals and had several reports from people who ran this on various Unix boxes, confirming that Linux seems to be unique on the way this is handled. The way NODEFER affects signals on other Unix boxes is as follows: 1) If NODEFER is set, other signals in sa_mask are still blocked. 2) If NODEFER is set and the signal is in sa_mask, then the signal is still blocked. (Note: this is the behavior of all tested but Linux _and_ NetBSD 2.0 *). The way NODEFER affects signals on Linux: 1) If NODEFER is set, other signals are _not_ blocked regardless of sa_mask (Even NetBSD doesn't do this). 2) If NODEFER is set and the signal is in sa_mask, then the signal being handled is not blocked. The patch converts signal handling in all current Linux architectures to the way most Unix boxes work. Unix boxes that were tested: DU4, AIX 5.2, Irix 6.5, NetBSD 2.0, SFU 3.5 on WinXP, AIX 5.3, Mac OSX, and of course Linux 2.6.13-rcX. * NetBSD was the only other Unix to behave like Linux on point #2. The main concern was brought up by point #1 which even NetBSD isn't like Linux. So with this patch, we leave NetBSD as the lonely one that behaves differently here with #2. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-08-29[PATCH] Dynamic hugepage addresses for ppc64David Gibson
Paulus, I think this is now a reasonable candidate for the post-2.6.13 queue. Relax address restrictions for hugepages on ppc64 Presently, 64-bit applications on ppc64 may only use hugepages in the address region from 1-1.5T. Furthermore, if hugepages are enabled in the kernel config, they may only use hugepages and never normal pages in this area. This patch relaxes this restriction, allowing any address to be used with hugepages, but with a 1TB granularity. That is if you map a hugepage anywhere in the region 1TB-2TB, that entire area will be reserved exclusively for hugepages for the remainder of the process's lifetime. This works analagously to hugepages in 32-bit applications, where hugepages can be mapped anywhere, but with 256MB (mmu segment) granularity. This patch applies on top of the four level pagetable patch (http://patchwork.ozlabs.org/linuxppc64/patch?id=1936). Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29[PATCH] ppc64: Check of_chosen in check_for_initrd()Michael Ellerman
You can't call get_property() on a NULL node, so check if of_chosen is set in check_for_initrd(). Signed-off-by: Michael Ellerman <michael@ellerman.id.au> arch/ppc64/kernel/setup.c | 20 ++++++++++++-------- 1 files changed, 12 insertions(+), 8 deletions(-) Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29[PATCH] ppc64: unflatten_device_tree() should check if lmb_alloc() failsMichael Ellerman
unflatten_device_tree() doesn't check if lmb_alloc() succeeds or not, it should. All it can do is panic, but at least there's an error message (assuming you have some sort of console at that point). Signed-off-by: Michael Ellerman <michael@ellerman.id.au> arch/ppc64/kernel/prom.c | 9 +++++++-- 1 files changed, 7 insertions(+), 2 deletions(-) Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29[PATCH] ppc64: Fix a misleading printk in unflatten_dt_node()Michael Ellerman
When unflatten_dt_node() fails to find an OF_DT_END_NODE tag it prints "Weird tag at start of node", this should be "Weird tag at end of node". Signed-off-by: Michael Ellerman <michael@ellerman.id.au> arch/ppc64/kernel/prom.c | 2 +- 1 files changed, 1 insertion(+), 1 deletion(-) Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29[PATCH] ppc64: Move ppc64_enable_pmcs() logic into a ppc_md functionMichael Ellerman
This patch moves power4_enable_pmcs() to arch/ppc64/kernel/pmc.c. I've tested it on P5 LPAR and P4. It does what it used to. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29[PATCH] ppc64: allow xmon=offOlaf Hering
If both CONFIG_XMON and CONFIG_XMON_DEFAULT is enabled in the .config, there is no way to disable xmon again. setup_system calls first xmon_init, later parse_early_param. So a new 'xmon=off' cmdline option will do the right thing. Signed-off-by: Olaf Hering <olh@suse.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29[PATCH] ppc64: Remove CONFIG_MSCHUNKSMichael Ellerman
We can now remove CONFIG_MSCHUNKS as it doesn't do anything interesting anymore. The only macro in abs_addr.h which is called by non-iSeries code is phys_to_abs(), so remove the other dummy implementations, and we add a firmware feature check to phys_to_abs(). Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29[PATCH] ppc64: Simplify some lmb functionsMichael Ellerman
lmb_phys_mem_size() can always return lmb.memory.size, as long as it's called after lmb_analyze(), which it is. There's no need to recalculate the size on every call. lmb_analyze() was calculating a few things we then threw away, so just don't calculate them to start with. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29[PATCH] ppc64: Remove physbase from the lmb_property structMichael Ellerman
We no longer need the lmb code to know about abs and phys addresses, so remove the physbase variable from the lmb_property struct. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29[PATCH] ppc64: Remove redundant abs_to_phys() macroMichael Ellerman
abs_to_phys() is a macro that turns out to do nothing, and also has the unfortunate property that it's not the inverse of phys_to_abs() on iSeries. The following is for my benefit as much as everyone else. With CONFIG_MSCHUNKS enabled, the lmb code is changed such that it keeps a physbase variable for each lmb region. This is used to take the possibly discontiguous lmb regions and present them as a contiguous address space beginning from zero. In this context each lmb region's base address is its "absolute" base address, and its physbase is it's "physical" address (from Linux's point of view). The abs_to_phys() macro does the mapping from "absolute" to "physical". Note: This is not related to the iSeries mapping of physical to absolute (ie. Hypervisor) addresses which is maintained with the msChunks structure. And the msChunks structure is not controlled via CONFIG_MSCHUNKS. Once upon a time you could compile for non-iSeries with CONFIG_MSCHUNKS enabled. But these days CONFIG_MSCHUNKS depends on CONFIG_PPC_ISERIES, so for non-iSeries code abs_to_phys() is a no-op. On iSeries we always have one lmb region which spans from 0 to systemcfg->physicalMemorySize (arch/ppc64/kernel/iSeries_setup.c line 383). This region has a base (ie. absolute) address of 0, and a physbase address of 0 (as calculated in lmb_analyze() (arch/ppc64/kernel/lmb.c line 144)). On iSeries, abs_to_phys(aa) is defined as lmb_abs_to_phys(aa), which finds the lmb region containing aa (and there's only one, ie. 0), and then does: return lmb.memory.region[0].physbase + (aa - lmb.memory.region[0].base) physbase == base == 0, so you're left with "return aa". So remove abs_to_phys(), and lmb_abs_to_phys() which is the implementation of abs_to_phys() for iSeries. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29[PATCH] ppc64: Remove redundant use of pointers in lmb codeMichael Ellerman
The lmb code is all written to use a pointer to an lmb struct. But it's always the same lmb struct, called "lmb". So we take the address of lmb, call it _lmb and then start using _lmb->foo everywhere, which is silly. This patch removes the _lmb pointers and replaces them with direct references to the one "lmb" struct. We do the same for some _mem and _rsv pointers which point to lmb.memory and lmb.reserved respectively. This patch looks quite busy, but it's basically just: s/_lmb->/lmb./g s/_mem->/lmb.memory./g s/_rsv->/lmb.reserved./g s/_rsv/&lmb.reserved/g s/mem->/lmb.memory./g Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29[PATCH] ppc64: Remove redundant uses of physRpn_to_absRpnMichael Ellerman
physRpn_to_absRpn is a no-op on non-iSeries platforms, remove the two redundant calls. There's only one caller on iSeries so fold the logic in there so we can get rid of it completely. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29[PATCH] ppc64: Rename msChunks structureMichael Ellerman
Rename the msChunks struct to get rid of the StUdlY caps and make it a bit clearer what it's for. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29[PATCH] ppc64: msChunks cleanupsMichael Ellerman
Chunks are 256KB, so use constants for the size/shift/mask, rather than getting them from the msChunks struct. The iSeries debugger (??) might still need access to the values in the msChunks struct, so we keep them around for now, but set them from the constant values. Replace msChunks_entry typedef with regular u32. Simplify msChunks_alloc() to manipulate klimit directly, rather than via a parameter. Move msChunks_alloc() and msChunks into iSeries_setup.c, as that's where they're used. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29[PATCH] ppc64: Remove PTRRELOC() from msChunks codeMichael Ellerman
The msChunks code was written to work on pSeries, but now it's only used on iSeries. This means there's no need to do PTRRELOC anymore, so remove it all. A few places were getting "extern reloc_offset()" from abs_addr.h, move it into system.h instead. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29[PATCH] ppc64: introduce FW_FEATURE_ISERIESStephen Rothwell
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29[PATCH] ppc64: make firmware_has_feature() strongerStephen Rothwell
Make firmware_has_feature() evaluate at compile time for the non pSeries case and tidy up code where possible. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29[PATCH] ppc64: create firmware_has_feature()Stephen Rothwell
Create the firmware_has_feature() inline and move the firmware feature stuff into its own header file. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29[PATCH] ppc64: remove firmware features from cpu_specStephen Rothwell
The firmware_features field of struct cpu_spec should really be a separate variable as the firmware features do not depend on the chip and the bitmask is constructed independently. By removing it, we save 112 bytes from the cpu_specs array and we access the bitmask directly instead of via the cur_cpu_spec pointer. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29[PATCH] Move variables in ppc64 head.S from .data to .bssDavid Gibson
The ppc64 head.S defines several zero-initialized structures, such as the empty_zero_page and the kernel top-level pagetable. Currently they are defined to be in the data section. However, they're not used until after the bss is cleared, so this patch moves them to the bss, saving two and a half pages from the vmlinux. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29[PATCH] Tweak comments in ppc64 head.SDavid Gibson
This patch adjust some comments in head.S for accuracy, clarity, and spelling. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29[PATCH] Remove unneeded #defines in head.SDavid Gibson
arch/ppc64/kernel/head.S #defines SECONDARY_PROCESSORS then has some #ifdefs based on it. Whatever purpose this had is long lost, this patch removes it. Likewise, head.S defines H_SET_ASR, which is now defined, along with other hypervisor call numbers in hvcall.h. This patch deletes it, as well, from head.S. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29[PATCH] Fix apparent code overlap in ppc64 head.SDavid Gibson
An #if/#else construct near the top of ppc64's head.S appears to create overlapping sections of code for iSeries and pSeries (i.e. one thing on iSeries and something different in the same place on pSeries). In fact, checking the various absolute offsets, it doesn't. This patch unravels the #ifdefs to make it more obvious what's going on. This accomplishes another microstep towards a single kernel image which can boot both iSeries and pSeries. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29[PATCH] Remove general use functions from head.SDavid Gibson
As well as the interrupt vectors and initialization code, head.S contains several asm functions which are used during runtime. This patch moves these to misc.S, a more sensible location for random asm support code. A couple The functions moved are: disable_kernel_fp giveup_fpu disable_kernel_altivec giveup_altivec __setup_cpu_power3 (empty function) Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29[PATCH] Change address of ppc64 initial segment tableDavid Gibson
On ppc64 machines with segment tables, CPU0's segment table is at a fixed address, currently 0x9000. This patch moves it to the free space at 0x6000, just below the fwnmi data area. This saves 8k of space in vmlinux and the runtime kernel image. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29[PATCH] Move iSeries and common vectors into unused space in head.SDavid Gibson
In the ppc64 kernel head.S there is currently quite a lot of unused space between the naca (at fixed address 0x4000) and the fwnmi data area (at fixed address 0x7000). This patch moves various exception vectors and support code into this region to use the wasted space. The functions load_up_fpu and load_up_altivec are moved down as well, since they are essentially continuations of the fp_unavailable_common and altivec_unavailable_common vectors, respectively. Likewise, the fwnmi vectors themselves are moved down into this area, because while the location of the fwnmi data area is fixed by the RPA, the vectors themselves can be anywhere sufficiently low. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29[PATCH] Remove NACA fixed address constraintDavid Gibson
Comments in head.S suggest that the iSeries naca has a fixed address, because tools expect to find it there. The only tool which appears to access the naca is addRamDisk, but both the in-kernel version and the version used in RHEL and SuSE in fact locate the NACA the same way as the hypervisor does, by following the pointer in the hvReleaseData structure. Since the requirement for a fixed address seems to be obsolete, this patch removes the naca from head.S and replaces it with a normal C initializer. For good measure, it removes an old version of addRamDisk.c which was sitting, unused, in the ppc32 tree. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29[PATCH] ppc64: split pSeries specific parts out of vio.cStephen Rothwell
This patch just splits out the pSeries specific parts of vio.c. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29[PATCH] ppc64: make the bus matching function platform specificStephen Rothwell
This patch allows us to have a different bus if matching function for each platform. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29[PATCH] ppc64: move iSeries vio iommu initStephen Rothwell
Since the iSeries vio iommu tables cannot be used until after the vio bus has been initialised, move the initialisation of the tables to there. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29[PATCH] ppc64: split iSeries specific parts out of vio.cStephen Rothwell
This patch splits the iSeries specific parts out of vio.c. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29[PATCH] ppc64: change duplicate Kconfig menu "General setup" to "Bus Options"Frank Rowand
arch/ppc64/Kconfig defines a "General setup" menu, but also sources init/Kconfig which also defines a "General setup" menu. Both of these menus appear at the top level of make menuconfig. Having two menus with the same name is confusing. This patch renames the ppc64/Kconfig menu to be "Bus Options" and moves options in this menu which are not bus related to the end of the "Platform support" menu. There are many variations among architectures on the exact naming of the "Bus Options" menu. I chose to use the simplest one, which is also used in arch/ppc/Kconfig. Signed-off-by: Frank Rowand <frowand@mvista.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29[PATCH] ppc64: PCI device-node failure detectionJake Moilanen
OpenFirmware marks devices as failed in the device-tree when a hardware problem is detected. The kernel needs to fail config reads/writes to prevent a kernel crash when incorrect data is read. This patch validates that the device-node is not marked "fail" when config space reads/writes are attempted. Signed-off-by: Jake Moilanen <moilanen@austin.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-08-29[PATCH] flattened device tree changesBenjamin Herrenschmidt
This patch updates the format of the flattened device-tree passed between the boot trampoline and the kernel to support a more compact representation, for use by embedded systems mostly. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>