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2009-03-06Merge branch 'x86/core' into tracing/texteditIngo Molnar
Conflicts: arch/x86/Kconfig block/blktrace.c kernel/irq/handle.c Semantic conflict: kernel/trace/blktrace.c Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-06Merge branches 'tracing/ftrace' and 'tracing/function-graph-tracer' into ↵Ingo Molnar
tracing/core
2009-03-05tracing: clean up menuIngo Molnar
Clean up menu structure, introduce TRACING_SUPPORT switch that signals whether an architecture supports various instrumentation mechanisms. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-05Merge branch 'x86/uv' into x86/coreIngo Molnar
2009-03-05Merge branch 'x86/mm' into x86/coreIngo Molnar
2009-03-05Merge branch 'x86/mce2' into x86/coreIngo Molnar
2009-03-05Merge branch 'x86/urgent' into x86/coreIngo Molnar
Conflicts: arch/x86/include/asm/fixmap_64.h Semantic merge: arch/x86/include/asm/fixmap.h Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-05x86: UV, SGI RTC: add generic system vector, build fix on UPIngo Molnar
Make ack_APIC_irq() build on !SMP && !APIC too. Cc: Dimitri Sivanich <sivanich@sgi.com> LKML-Reference: <20090304185605.GA24419@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-05x86: pre-initialize boot_cpu_data.x86_phys_bits to avoid system_state testsJeremy Fitzhardinge
Impact: cleanup, micro-optimization Pre-initialize boot_cpu_data.x86_phys_bits to a reasonable default to remove the use of system_state tests in __virt_addr_valid() and __phys_addr(). Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-05x86-32: use specific __vmalloc_start_set flag in __virt_addr_validJeremy Fitzhardinge
Rather than relying on the ever-unreliable system_state, add a specific __vmalloc_start_set flag to indicate whether the vmalloc area has meaningful boundaries yet, and use that in x86-32's __phys_addr and __virt_addr_valid. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-05x86: clean up old gcc warningsJeremy Fitzhardinge
gcc 3.2.2 reports: In file included from /usr/src/all/linux-next/arch/x86/include/asm/page.h:8, from /usr/src/all/linux-next/arch/x86/include/asm/processor.h:18, from /usr/src/all/linux-next/arch/x86/include/asm/atomic_32.h:6, from /usr/src/all/linux-next/arch/x86/include/asm/atomic.h:2, from include/linux/crypto.h:20, from arch/x86/kernel/asm-offsets_32.c:7, from arch/x86/kernel/asm-offsets.c:2: /usr/src/all/linux-next/arch/x86/include/asm/page_types.h:54: warning: parameter has incomplete type /usr/src/all/linux-next/arch/x86/include/asm/page_types.h:56: warning: parameter has incomplete type In file included from /usr/src/all/linux-next/arch/x86/include/asm/page.h:8, from /usr/src/all/linux-next/arch/x86/include/asm/processor.h:18, from include/linux/prefetch.h:14, from include/linux/list.h:6, from include/linux/module.h:9, from init/main.c:13: /usr/src/all/linux-next/arch/x86/include/asm/page_types.h:54: warning: parameter has incomplete type /usr/src/all/linux-next/arch/x86/include/asm/page_types.h:56: warning: parameter has incomplete type This is a bogus warning, but moving the pat-related functions into asm/pat.h and including asm/pgtable_types.h should fix it. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Reported-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-05x86: move init_memory_mapping() to common mm/init.c, build fix on 32-bit PAEIngo Molnar
Impact: build fix Cc: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1236257708-27269-14-git-send-email-penberg@cs.helsinki.fi> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-05x86: move function and variable declarations to asm/init.hPekka Enberg
Impact: cleanup Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1236257708-27269-17-git-send-email-penberg@cs.helsinki.fi> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-05x86: unify kernel_physical_mapping_init() function signaturesPekka Enberg
Impact: cleanup In preparation for moving the function declaration to a header file, unify 32-bit and 64-bit signatures. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1236257708-27269-16-git-send-email-penberg@cs.helsinki.fi> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-05x86: fix up some bad global variable names in mm/init.cPekka Enberg
Impact: cleanup The table_start, table_end, and table_top are too generic for global namespace so rename them to be more specific. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1236257708-27269-15-git-send-email-penberg@cs.helsinki.fi> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-05x86: move init_memory_mapping() to common mm/init.cPekka Enberg
Impact: cleanup This patch moves the init_memory_mapping() function to common mm/init.c. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1236257708-27269-14-git-send-email-penberg@cs.helsinki.fi> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-05x86: add stub init_gbpages() for 32-bit init_memory_mapping()Pekka Enberg
Impact: cleanup This patch adds an empty static inline init_gbpages() for the 32-bit version of init_memory_mapping() making both versions identical. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1236257708-27269-13-git-send-email-penberg@cs.helsinki.fi> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-05x86: ifdef 32-bit and 64-bit NR_RANGE_MR for save_mr() unificationPekka Enberg
Impact: cleanup As a trivial preparation for moving common code to arc/x86/mm/init.c, ifdef the 32-bit and 64-bit versions of NR_RANGE_MR. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1236257708-27269-12-git-send-email-penberg@cs.helsinki.fi> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-05x86: ifdef 32-bit and 64-bit pfn setup in init_memory_mapping()Pekka Enberg
Impact: cleanup To reduce the diff between the 32-bit and 64-bit versions of init_memory_mapping(), ifdef configuration specific pfn setup code in the function. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1236257708-27269-11-git-send-email-penberg@cs.helsinki.fi> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-05x86: ifdef 32-bit and 64-bit setup in init_memory_mapping()Pekka Enberg
Impact: cleanup To reduce the diff between the 32-bit and 64-bit versions of init_memory_mapping(), ifdef configuration specific setup code in the function. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1236257708-27269-10-git-send-email-penberg@cs.helsinki.fi> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-05x86: add table start and end sanity checks to 32-bit init_memory_mapping()Pekka Enberg
Impact: cleanup This patch adds a sanity check to the 32-bit version of init_memory_mapping() to reduce the diff to the 64-bit version. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1236257708-27269-9-git-send-email-penberg@cs.helsinki.fi> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-05x86: unify kernel_physical_mapping_init() call in init_memory_mapping()Pekka Enberg
Impact: cleanup The 64-bit version of init_memory_mapping() uses the last mapped address returned from kernel_physical_mapping_init() whereas the 32-bit version doesn't. This patch adds relevant ifdefs to both versions of the function to reduce the diff between them. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1236257708-27269-8-git-send-email-penberg@cs.helsinki.fi> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-05x86: rename after_init_bootmem to after_bootmem in mm/init_32.cPekka Enberg
Impact: cleanup This patch renames after_init_bootmem to after_bootmem in mm/init_32.c to reduce the diff to the 64-bit version of of init_memory_mapping(). Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1236257708-27269-7-git-send-email-penberg@cs.helsinki.fi> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-05x86: remove unnecessary save_mr() sanity checkPekka Enberg
Impact: cleanup The save_mr() function already checks that start_pfn is less than end_pfn so we can remove the unnecessary check which reduces the diff between the 32-bit and the 64-bit versions of init_memory_mapping(). Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1236257708-27269-6-git-send-email-penberg@cs.helsinki.fi> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-05x86: ifdef 32-bit specific setup in init_memory_mapping()Pekka Enberg
Impact: cleanup Enabling NX, PSE, and PGE are only required on 32-bit so ifdef them in both versions of the function. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1236257708-27269-5-git-send-email-penberg@cs.helsinki.fi> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-05x86: move pgd_base out of init_memory_mapping()Pekka Enberg
Impact: cleanup This patch moves pgd_base out of init_memory_mapping() to reduce the diff between the 32-bit version and the 64-bit version of the function. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1236257708-27269-4-git-send-email-penberg@cs.helsinki.fi> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-05x86: find_early_table_space() unificationPekka Enberg
Impact: cleanup There are some minor differences between the 32-bit and 64-bit find_early_table_space() functions. This patch wraps those differences under CONFIG_X86_32 to make the function identical on both configurations. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1236257708-27269-3-git-send-email-penberg@cs.helsinki.fi> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-05x86: add gbpages support to 32-bit init_memory_mapping()Pekka Enberg
Impact: cleanup To reduce the diff between the 32-bit and 64-bit versions of init_memory_mapping(), add gbpages support to the 32-bit version. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1236257708-27269-2-git-send-email-penberg@cs.helsinki.fi> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-05x86: init_memory_mapping() trivial cleanupsPekka Enberg
Impact: cleanup To reduce the diff between the 32-bit and 64-bit versions of init_memory_mapping(), fix up all trivial issues. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1236257708-27269-1-git-send-email-penberg@cs.helsinki.fi> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-05tracing/function-graph-tracer: use the more lightweight local clockFrederic Weisbecker
Impact: decrease hangs risks with the graph tracer on slow systems Since the function graph tracer can spend too much time on timer interrupts, it's better now to use the more lightweight local clock. Anyway, the function graph traces are more reliable on a per cpu trace. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Peter Zijlstra <peterz@infradead.org> LKML-Reference: <49af243d.06e9300a.53ad.ffff840c@mx.google.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-05x86: UV, SGI RTC: fix uv_time.c for UPDimitri Sivanich
Fix non-smp build of uv_time.c. Signed-off-by: Dimitri Sivanich <sivanich@sgi.com> LKML-Reference: <20090304220246.GC6288@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-04x86: fix bootmem cross node for 32bit numa, cleanupYinghai Lu
Impact: clean up Simplify the code, reuse some lines. Remove min_low_pfn reference, it is always 0 Signed-off-by: Yinghai Lu <yinghai@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <49AEE2C4.2030602@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-04x86: move free_initrd_mem() to common mm/init.cPekka Enberg
Impact: cleanup The function is identical on 32-bit and 64-bit configurations so move it to the common mm/init.c file. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> LKML-Reference: <1236158020.29024.28.camel@penberg-laptop> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-04x86: add Dell XPS710 reboot quirkLeann Ogasawara
Dell XPS710 will hang on reboot. This is resolved by adding a quirk to set bios reboot. Signed-off-by: Leann Ogasawara <leann.ogasawara@canonical.com> Signed-off-by: Tim Gardner <tim.gardner@canonical.com> Cc: "manoj.iyer" <manoj.iyer@canonical.com> Cc: <stable@kernel.org> LKML-Reference: <1236196380.3231.89.camel@emiko> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-04x86: reserve exact size of mptableYinghai Lu
Impact: save a bit of RAM Get the exact size for the reserve_bootmem() call. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <49AE4922.605@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-04x86: ioremap mptableYinghai Lu
Impact: fix boot with mptable above max_low_mapped Try to use early_ioremap() to map MPC to make sure it works even it is at the end of ram. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <49AE4901.3090801@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Reported-and-tested-by: Kevin O'Connor <kevin@koconnor.net>
2009-03-04x86: make 32-bit init_memory_mapping range change more like 64-bitYinghai Lu
Impact: cleanup make code more readable and more like 64-bit Signed-off-by: Yinghai Lu <yinghai@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <49AE48B4.8010907@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-04x86: fix bootmem cross node for 32bit numaYinghai Lu
Impact: fix panic on system 2g x4 sockets Found one system with 4 sockets and every sockets has 2g can not boot with numa32 because boot mem is crossing nodes. So try to have numa version of setup_bootmem_allocator(). Signed-off-by: Yinghai Lu <yinghai@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <49AE485B.8000902@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-04x86, math-emu: fix init_fpu for task != currentDaniel Glöckner
Impact: fix math-emu related crash while using GDB/ptrace init_fpu() calls finit to initialize a task's xstate, while finit always works on the current task. If we use PTRACE_GETFPREGS on another process and both processes did not already use floating point, we get a null pointer exception in finit. This patch creates a new function finit_task that takes a task_struct parameter. finit becomes a wrapper that simply calls finit_task with current. On the plus side this avoids many calls to get_current which would each resolve to an inline assembler mov instruction. An empty finit_task has been added to i387.h to avoid linker errors in case the compiler still emits the call in init_fpu when CONFIG_MATH_EMULATION is not defined. The declaration of finit in i387.h has been removed as the remaining code using this function gets its prototype from fpu_proto.h. Signed-off-by: Daniel Glöckner <dg@emlix.com> Cc: Suresh Siddha <suresh.b.siddha@intel.com> Cc: "Pallipadi Venkatesh" <venkatesh.pallipadi@intel.com> Cc: Arjan van de Ven <arjan@infradead.org> Cc: Bill Metzenthen <billm@melbpc.org.au> LKML-Reference: <E1Lew31-0004il-Fg@mailer.emlix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-04x86: UV, SGI RTC: add UV RTC clocksource/clockeventsDimitri Sivanich
This patch provides a high resolution clock/timer source using the SGI UV system-wide synchronized RTC clock/timer hardware. Signed-off-by: Dimitri Sivanich <sivanich@sgi.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: john stultz <johnstul@us.ibm.com> LKML-Reference: <20090304185918.GC24419@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-04x86: UV, SGI RTC: loop through installed UV bladesDimitri Sivanich
Add macro to loop through each possible blade. Signed-off-by: Dimitri Sivanich <sivanich@sgi.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: john stultz <johnstul@us.ibm.com> LKML-Reference: <20090304185719.GB24419@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-04x86: UV, SGI RTC: add generic system vectorDimitri Sivanich
This patch allocates a system interrupt vector for various platform specific uses. Signed-off-by: Dimitri Sivanich <sivanich@sgi.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: john stultz <johnstul@us.ibm.com> LKML-Reference: <20090304185605.GA24419@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-04Merge branch 'x86/urgent' into x86/mmIngo Molnar
Conflicts: arch/x86/include/asm/fixmap_64.h Semantic merge: arch/x86/include/asm/fixmap.h Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-04x86: EFI: Back efi_ioremap with init_memory_mapping instead of FIX_MAPHuang Ying
Impact: Fix boot failure on EFI system with large runtime memory range Brian Maly reported that some EFI system with large runtime memory range can not boot. Because the FIX_MAP used to map runtime memory range is smaller than run time memory range. This patch fixes this issue by re-implement efi_ioremap() with init_memory_mapping(). Reported-and-tested-by: Brian Maly <bmaly@redhat.com> Signed-off-by: Huang Ying <ying.huang@intel.com> Cc: Brian Maly <bmaly@redhat.com> Cc: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1236135513.6204.306.camel@yhuang-dev.sh.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-04x86: set_highmem_pages_init() cleanup, #2Pekka Enberg
Impact: cleanup The zones are set up at this stage so there's a highmem zone available even for the UMA case. The only difference there is that for machines that have CONFIG_HIGHMEM enabled but don't have any highmem available, ->zone_start_pfn is zero whereas highstart_pfn is non-zero). The field is left zeroed because of the !size test in free_area_init_core() but shouldn't be a problem because add_highpages_with_active_regions() handles empty ranges just fine. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Mel Gorman <mel@csn.ul.ie> LKML-Reference: <1236154567.29024.23.camel@penberg-laptop> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-04x86: fix DMI on EFIBrian Maly
Impact: reactivate DMI quirks on EFI hardware DMI tables are loaded by EFI, so the dmi calls must happen after efi_init() and not before. Currently Apple hardware uses DMI to determine the framebuffer mappings for efifb. Without DMI working you also have no video on MacBook Pro. This patch resolves the DMI issue for EFI hardware (DMI is now properly detected at boot), and additionally efifb now loads on Apple hardware (i.e. video works). Signed-off-by: Brian Maly <bmaly@redhat> Acked-by: Yinghai Lu <yinghai@kernel.org> Cc: ying.huang@intel.com LKML-Reference: <49ADEDA3.1030406@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> arch/x86/kernel/setup.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
2009-03-04x86, mce: fix build failure in arch/x86/kernel/cpu/mcheck/threshold.cIngo Molnar
Impact: build fix The APIC code rewrite in the x86 tree broke the x86/mce branch: arch/x86/kernel/cpu/mcheck/threshold.c: In function ‘mce_threshold_interrupt’: arch/x86/kernel/cpu/mcheck/threshold.c:24: error: implicit declaration of function ‘ack_APIC_irq’ Also tidy up the file a bit while at it. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-04x86: move devmem_is_allowed() to common mm/init.cPekka Enberg
Impact: cleanup The function is identical on 32-bit and 64-bit configurations so move it to the common mm/init.c file. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> LKML-Reference: <1236160001.29024.29.camel@penberg-laptop> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-04Merge branch 'tracing/ftrace'; commit 'v2.6.29-rc7' into tracing/coreIngo Molnar
2009-03-04powerpc: Run sbc610 USB fixup code only on the appropriate platform.Tony Breeds
commit a969e76a7101bf5f3d369563df1ca1253dd6131b (powerpc: Correct USB support for GE Fanuc SBC610) introduced a fixup for NEC usb controllers. This fixup should only run on GEF SBC610 boards. Fixes Fedora bug #486511. (https://bugzilla.redhat.com/show_bug.cgi?id=486511) Signed-off-by: Tony Breeds <tony@bakeyournoodle.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>