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2010-10-30Merge branches 'perf-fixes-for-linus' and 'x86-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: jump label: Add work around to i386 gcc asm goto bug x86, ftrace: Use safe noops, drop trap test jump_label: Fix unaligned traps on sparc. jump label: Make arch_jump_label_text_poke_early() optional jump label: Fix error with preempt disable holding mutex oprofile: Remove deprecated use of flush_scheduled_work() oprofile: Fix the hang while taking the cpu offline jump label: Fix deadlock b/w jump_label_mutex vs. text_mutex jump label: Fix module __init section race * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: Check irq_remapped instead of remapping_enabled in destroy_irq()
2010-10-30x86: Check irq_remapped instead of remapping_enabled in destroy_irq()Yinghai Lu
Russ Anderson reported: | There is a regression that is causing a NULL pointer dereference | in free_irte when shutting down xpc. git bisect narrowed it down | to git commit d585d06(intr_remap: Simplify the code further), which | changed free_irte(). Reverse applying the patch fixes the problem. We need to use irq_remapped() for each irq instead of checking only intr_remapping_enabled as there might be non remapped irqs even when remapping is enabled. [ tglx: use cfg instead of retrieving it again. Massaged changelog ] Reported-bisected-and-tested-by: Russ Anderson <rja@sgi.com> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Cc: Suresh Siddha <suresh.b.siddha@intel.com> LKML-Reference: <4CCBD511.40607@kernel.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2010-10-29Merge branches 'x86-fixes-for-linus' and 'x86-uv-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, alternative: Call stop_machine_text_poke() on all cpus x86-32: Restore irq stacks NUMA-aware allocations x86, memblock: Fix early_node_mem with big reserved region. * 'x86-uv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, uv: More Westmere support on SGI UV x86, uv: Enable Westmere support on SGI UV
2010-10-29x86, alternative: Call stop_machine_text_poke() on all cpusJason Baron
Currently, text_poke_smp() passes a NULL as the third argument to __stop_machine(), which will only run stop_machine_text_poke() on 1 cpu. Change NULL -> cpu_online_mask, as stop_machine_text_poke() is intended to be run on all cpus. I actually didn't notice any problems with stop_machine_text_poke() only being called on 1 cpu, but found this via code inspection. Signed-off-by: Jason Baron <jbaron@redhat.com> LKML-Reference: <20101028152026.GB2875@redhat.com> Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2010-10-29Merge branch 'for_linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb: kgdb,ppc: Individual register get/set for ppc kgdbts: prevent re-entry to kgdbts before it unregisters debug_core,x86,blackfin: Clean up hw debug disable API kdb: Fix early debugging crash regression kgdb,arm: fix register dump kdb: fix per_cpu command to remove supress mask kdb: Add kdb kernel module sample
2010-10-29jump label: Add work around to i386 gcc asm goto bugSteven Rostedt
On i386 (not x86_64) early implementations of gcc would have a bug with asm goto causing it to produce code like the following: (This was noticed by Peter Zijlstra) 56 pushl 0 67 nopl jmp 0x6f popl jmp 0x8c 6f mov test je 0x8c 8c mov call *(%esp) The jump added in the asm goto skipped over the popl that matched the pushl 0, which lead up to a quick crash of the system when the jump was enabled. The nopl is defined in the asm goto () statement and when tracepoints are enabled, the nop changes to a jump to the label that was specified by the asm goto. asm goto is suppose to tell gcc that the code in the asm might jump to an external label. Here gcc obviously fails to make that work. The bug report for gcc is here: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46226 The bug only appears on x86 when not compiled with -maccumulate-outgoing-args. This option is always set on x86_64 and it is also the work around for a function graph tracer i386 bug. (See commit: 746357d6a526d6da9d89a2ec645b28406e959c2e) This explains why the bug only showed up on i386 when function graph tracer was not enabled. This patch now adds a CONFIG_JUMP_LABEL option that is default off instead of using jump labels by default. When jump labels are enabled, the -maccumulate-outgoing-args will be used (causing a slightly larger kernel image on i386). This option will exist until we have a way to detect if the gcc compiler in use is safe to use on all configurations without the work around. Note, there exists such a test, but for now we will keep the enabling of jump label as a manual option. Archs that know the compiler is safe with asm goto, may choose to select JUMP_LABEL and enable it by default. Reported-by: Ingo Molnar <mingo@elte.hu> Cause-discovered-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Jason Baron <jbaron@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: David Daney <ddaney@caviumnetworks.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: David Miller <davem@davemloft.net> Cc: Richard Henderson <rth@redhat.com> LKML-Reference: <1288028746.3673.11.camel@laptop> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2010-10-29debug_core,x86,blackfin: Clean up hw debug disable APIDongdong Deng
The kgdb_disable_hw_debug() was an architecture specific function for disabling all hardware breakpoints on a per cpu basis when entering the debug core. This patch will remove the weak function kdbg_disable_hw_debug() and change it into a call back which lives with the rest of hw breakpoint call backs in struct kgdb_arch. Signed-off-by: Dongdong Deng <dongdong.deng@windriver.com> Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
2010-10-29x86, ftrace: Use safe noops, drop trap testH. Peter Anvin
Always use a safe 5-byte noop sequence. Drop the trap test, since it is known to return false negatives on some virtualization platforms on 32 bits. The resulting code is both simpler and safer. Cc: Daniel Drake <dsd@laptop.org> Cc: Jason Baron <jbaron@redhat.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2010-10-29x86-32: Restore irq stacks NUMA-aware allocationsEric Dumazet
Commit 22d4cd4c4d ("Allocate irq stacks seperate from percpu area") removed NUMA affinity of IRQ stacks as side-effect of the fix. Using alloc_pages_node() instead of __get_free_pages() is safe, even if the target node has no available LOWMEM pages : alloc_pages_node() fallbacks to another node. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Brian Gerst <brgerst@gmail.com> Cc: tj@kernel.org Cc: torvalds@linux-foundation.org Cc: Peter Zijlstra <peterz@infradead.org> LKML-Reference: <1288276854.2649.607.camel@edumazet-laptop> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-10-28x86, uv: More Westmere support on SGI UVRuss Anderson
Enable Westmere support for all APIC modes on SGI UV. Signed-off-by: Russ Anderson <rja@sgi.com> LKML-Reference: <20101028224132.GB15804@sgi.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2010-10-28Merge branch 'stable/xen-pcifront-0.8.2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen and branch 'for-linus' of git://xenbits.xen.org/people/sstabellini/linux-pvhvm * 'for-linus' of git://xenbits.xen.org/people/sstabellini/linux-pvhvm: xen: register xen pci notifier xen: initialize cpu masks for pv guests in xen_smp_init xen: add a missing #include to arch/x86/pci/xen.c xen: mask the MTRR feature from the cpuid xen: make hvc_xen console work for dom0. xen: add the direct mapping area for ISA bus access xen: Initialize xenbus for dom0. xen: use vcpu_ops to setup cpu masks xen: map a dummy page for local apic and ioapic in xen_set_fixmap xen: remap MSIs into pirqs when running as initial domain xen: remap GSIs as pirqs when running as initial domain xen: introduce XEN_DOM0 as a silent option xen: map MSIs into pirqs xen: support GSI -> pirq remapping in PV on HVM guests xen: add xen hvm acpi_register_gsi variant acpi: use indirect call to register gsi in different modes xen: implement xen_hvm_register_pirq xen: get the maximum number of pirqs from xen xen: support pirq != irq * 'stable/xen-pcifront-0.8.2' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: (27 commits) X86/PCI: Remove the dependency on isapnp_disable. xen: Update Makefile with CONFIG_BLOCK dependency for biomerge.c MAINTAINERS: Add myself to the Xen Hypervisor Interface and remove Chris Wright. x86: xen: Sanitse irq handling (part two) swiotlb-xen: On x86-32 builts, select SWIOTLB instead of depending on it. MAINTAINERS: Add myself for Xen PCI and Xen SWIOTLB maintainer. xen/pci: Request ACS when Xen-SWIOTLB is activated. xen-pcifront: Xen PCI frontend driver. xenbus: prevent warnings on unhandled enumeration values xenbus: Xen paravirtualised PCI hotplug support. xen/x86/PCI: Add support for the Xen PCI subsystem x86: Introduce x86_msi_ops msi: Introduce default_[teardown|setup]_msi_irqs with fallback. x86/PCI: Export pci_walk_bus function. x86/PCI: make sure _PAGE_IOMAP it set on pci mappings x86/PCI: Clean up pci_cache_line_size xen: fix shared irq device passthrough xen: Provide a variant of xen_poll_irq with timeout. xen: Find an unbound irq number in reverse order (high to low). xen: statically initialize cpu_evtchn_mask_p ... Fix up trivial conflicts in drivers/pci/Makefile
2010-10-28Merge branch 'kconfig' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6 * 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6: (38 commits) kbuild: convert `arch/tile' to the kconfig mainmenu upgrade README: cite nconfig Revert "kconfig: Temporarily disable dependency warnings" kconfig: Use PATH_MAX instead of 128 for path buffer sizes. kconfig: Fix realloc usage() kconfig: Propagate const kconfig: Don't go out from read config loop when you read new symbol kconfig: fix menuconfig on debian lenny kbuild: migrate all arch to the kconfig mainmenu upgrade kconfig: expand file names kconfig: use the file's name of sourced file kconfig: constify file name kconfig: don't emit warning upon rootmenu's prompt redefinition kconfig: replace KERNELVERSION usage by the mainmenu's prompt kconfig: delay gconf window initialization kconfig: expand by default the rootmenu's prompt kconfig: add a symbol string expansion helper kconfig: regen parser kconfig: implement the `mainmenu' directive kconfig: allow PACKAGE to be defined on the compiler's command-line ... Fix up trivial conflict in arch/mn10300/Kconfig
2010-10-28x86, memblock: Fix early_node_mem with big reserved region.Yinghai Lu
Xen can reserve huge amounts of memory for pre-ballooning, but that still shows as RAM in the e820 memory map. early_node_mem could not find range because of start/end adjusting, and will go through the fallback path. However, the fallback patch is still using memblock_x86_find_range_node(), and it is partially top-down because it go through active_range entries from low to high. Let's use memblock_find_in_range instead memblock_x86_find_range_node. So get real top down in fallback path. We may still need to make memblock_x86_find_range_node to do overall top_down work. Reported-by: Jeremy Fitzhardinge <jeremy@goop.org> Tested-by: Jeremy Fitzhardinge <jeremy@goop.org> Tested-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <4CC9A9C9.8020700@kernel.org> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2010-10-28Merge branch 'x86-platform-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: Move olpc to platform x86: Move uv to platform x86: Move mrst to platform x86: Move scx200 to platform x86: Move visws to platform x86: Move efi to platform x86: Move sfi to platform x86: Add platform directory
2010-10-28Merge branch 'linux-next' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 * 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: (27 commits) x86: allocate space within a region top-down x86: update iomem_resource end based on CPU physical address capabilities x86/PCI: allocate space from the end of a region, not the beginning PCI: allocate bus resources from the top down resources: support allocating space within a region from the top down resources: handle overflow when aligning start of available area resources: ensure callback doesn't allocate outside available space resources: factor out resource_clip() to simplify find_resource() resources: add a default alignf to simplify find_resource() x86/PCI: MMCONFIG: fix region end calculation PCI: Add support for polling PME state on suspended legacy PCI devices PCI: Export some PCI PM functionality PCI: fix message typo PCI: log vendor/device ID always PCI: update Intel chipset names and defines PCI: use new ccflags variable in Makefile PCI: add PCI_MSIX_TABLE/PBA defines PCI: add PCI vendor id for STmicroelectronics x86/PCI: irq and pci_ids patch for Intel Patsburg DeviceIDs PCI: OLPC: Only enable PCI configuration type override on XO-1 ...
2010-10-27Merge branch 'perf-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (50 commits) perf python scripting: Add futex-contention script perf python scripting: Fixup cut'n'paste error in sctop script perf scripting: Shut up 'perf record' final status perf record: Remove newline character from perror() argument perf python scripting: Support fedora 11 (audit 1.7.17) perf python scripting: Improve the syscalls-by-pid script perf python scripting: print the syscall name on sctop perf python scripting: Improve the syscalls-counts script perf python scripting: Improve the failed-syscalls-by-pid script kprobes: Remove redundant text_mutex lock in optimize x86/oprofile: Fix uninitialized variable use in debug printk tracing: Fix 'faild' -> 'failed' typo perf probe: Fix format specified for Dwarf_Off parameter perf trace: Fix detection of script extension perf trace: Use $PERF_EXEC_PATH in canned report scripts perf tools: Document event modifiers perf tools: Remove direct slang.h include perf_events: Fix for transaction recovery in group_sched_in() perf_events: Revert: Fix transaction recovery in group_sched_in() perf, x86: Use NUMA aware allocations for PEBS/BTS/DS allocations ...
2010-10-27Merge branch 'akpm-incoming-2'Linus Torvalds
* akpm-incoming-2: (139 commits) epoll: make epoll_wait() use the hrtimer range feature select: rename estimate_accuracy() to select_estimate_accuracy() Remove duplicate includes from many files ramoops: use the platform data structure instead of module params kernel/resource.c: handle reinsertion of an already-inserted resource kfifo: fix kfifo_alloc() to return a signed int value w1: don't allow arbitrary users to remove w1 devices alpha: remove dma64_addr_t usage mips: remove dma64_addr_t usage sparc: remove dma64_addr_t usage fuse: use release_pages() taskstats: use real microsecond granularity for CPU times taskstats: split fill_pid function taskstats: separate taskstats commands delayacct: align to 8 byte boundary on 64-bit systems delay-accounting: reimplement -c for getdelays.c to report information on a target command namespaces Kconfig: move namespace menu location after the cgroup namespaces Kconfig: remove the cgroup device whitelist experimental tag namespaces Kconfig: remove pointless cgroup dependency namespaces Kconfig: make namespace a submenu ...
2010-10-27Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: percpu: Remove the multi-page alignment facility x86-32: Allocate irq stacks seperate from percpu area x86-32, mm: Remove duplicated #include x86, printk: Get rid of <0> from stack output x86, kexec: Make sure to stop all CPUs before exiting the kernel x86/vsmp: Eliminate kconfig dependency warning
2010-10-27Remove duplicate includes from many filesZimny Lech
Signed-off-by: Zimny Lech <napohybelskurwysynom2010@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-27ptrace: cleanup arch_ptrace() on x86Namhyung Kim
Remove checking @addr less than 0 because @addr is now unsigned and use new udescp variable in order to remove unnecessary castings. [akpm@linux-foundation.org: fix unused variable 'udescp'] Signed-off-by: Namhyung Kim <namhyung@gmail.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-27ptrace: change signature of arch_ptrace()Namhyung Kim
Fix up the arguments to arch_ptrace() to take account of the fact that @addr and @data are now unsigned long rather than long as of a preceding patch in this series. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Cc: <linux-arch@vger.kernel.org> Acked-by: Roland McGrath <roland@redhat.com> Acked-by: David Howells <dhowells@redhat.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-27mm: fix race in kunmap_atomic()Peter Zijlstra
Christoph reported a nice splat which illustrated a race in the new stack based kmap_atomic implementation. The problem is that we pop our stack slot before we're completely done resetting its state -- in particular clearing the PTE (sometimes that's CONFIG_DEBUG_HIGHMEM). If an interrupt happens before we actually clear the PTE used for the last slot, that interrupt can reuse the slot in a dirty state, which triggers a BUG in kmap_atomic(). Fix this by introducing kmap_atomic_idx() which reports the current slot index without actually releasing it and use that to find the PTE and delay the _pop() until after we're completely done. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Reported-by: Christoph Hellwig <hch@infradead.org> Acked-by: Rik van Riel <riel@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-27x86-32: Allocate irq stacks seperate from percpu areaBrian Gerst
The percpu allocator cannot handle alignments larger than one page. Allocate the irq stacks seperately, and only keep the pointers as percpu data. Signed-off-by: Brian Gerst <brgerst@gmail.com> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: tj@kernel.org LKML-Reference: <1288158182-1753-1-git-send-email-brgerst@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-10-27x86: Move olpc to platformThomas Gleixner
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andres Salomon <dilinger@queued.net>
2010-10-27x86: Move uv to platformThomas Gleixner
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Mike Travis <travis@sgi.com>
2010-10-27x86: Move mrst to platformThomas Gleixner
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Jacob Pan <jacob.jun.pan@intel.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
2010-10-27x86: Move scx200 to platformThomas Gleixner
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2010-10-27x86: Move visws to platformThomas Gleixner
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2010-10-27x86: Move efi to platformThomas Gleixner
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Huang Ying <ying.huang@intel.com>
2010-10-27x86: Move sfi to platformThomas Gleixner
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Len Brown <lenb@kernel.org> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
2010-10-27x86: Add platform directoryThomas Gleixner
x86 has finally arrived in the embedded nightmare and will rapidly grow SoC platform support in various flavours. So we need a place for the platform support files. That also allows us to clean up the dumpground which arch/x86/kernel has become over time. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2010-10-26Merge branches 'upstream/xenfs' and 'upstream/core' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen * 'upstream/xenfs' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen: xen/privcmd: make privcmd visible in domU xen/privcmd: move remap_domain_mfn_range() to core xen code and export. privcmd: MMAPBATCH: Fix error handling/reporting xenbus: export xen_store_interface for xenfs xen/privcmd: make sure vma is ours before doing anything to it xen/privcmd: print SIGBUS faults xen/xenfs: set_page_dirty is supposed to return true if it dirties xen/privcmd: create address space to allow writable mmaps xen: add privcmd driver xen: add variable hypercall caller xen: add xen_set_domain_pte() xen: add /proc/xen/xsd_{kva,port} to xenfs * 'upstream/core' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen: (29 commits) xen: include xen/xen.h for definition of xen_initial_domain() xen: use host E820 map for dom0 xen: correctly rebuild mfn list list after migration. xen: improvements to VIRQ_DEBUG output xen: set up IRQ before binding virq to evtchn xen: ensure that all event channels start off bound to VCPU 0 xen/hvc: only notify if we actually sent something xen: don't add extra_pages for RAM after mem_end xen: add support for PAT xen: make sure xen_max_p2m_pfn is up to date xen: limit extra memory to a certain ratio of base xen: add extra pages for E820 RAM regions, even if beyond mem_end xen: make sure xen_extra_mem_start is beyond all non-RAM e820 xen: implement "extra" memory to reserve space for pages not present at boot xen: Use host-provided E820 map xen: don't map missing memory xen: defer building p2m mfn structures until kernel is mapped xen: add return value to set_phys_to_machine() xen: convert p2m to a 3 level tree xen: make install_p2mtop_page() static ... Fix up trivial conflict in arch/x86/xen/mmu.c, and fix the use of 'reserve_early()' - in the new memblock world order it is now 'memblock_x86_reserve_range()' instead. Pointed out by Jeremy.
2010-10-26Merge branch 'release' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (53 commits) ACPI: install ACPI table handler before any dynamic tables being loaded ACPI / PM: Blacklist another machine that needs acpi_sleep=nonvs ACPI: Page based coalescing of I/O remappings optimization ACPI: Convert simple locking to RCU based locking ACPI: Pre-map 'system event' related register blocks ACPI: Add interfaces for ioremapping/iounmapping ACPI registers ACPI: Maintain a list of ACPI memory mapped I/O remappings ACPI: Fix ioremap size for MMIO reads and writes ACPI / Battery: Return -ENODEV for unknown values in get_property() ACPI / PM: Fix reference counting of power resources Subject: [PATCH] ACPICA: Fix Scope() op in module level code ACPI battery: support percentage battery remaining capacity ACPI: Make Embedded Controller command timeout delay configurable ACPI dock: move some functions to .init.text ACPI: thermal: remove unused limit code ACPI: static sleep_states[] and acpi_gts_bfs_check ACPI: remove dead code ACPI: delete dedicated MAINTAINERS entries for ACPI EC and BATTERY drivers ACPI: Only processor needs CPU_IDLE ACPICA: Update version to 20101013 ...
2010-10-26workqueues: s/ON_STACK/ONSTACK/Andrew Morton
Silly though it is, completions and wait_queue_heads use foo_ONSTACK (COMPLETION_INITIALIZER_ONSTACK, DECLARE_COMPLETION_ONSTACK, __WAIT_QUEUE_HEAD_INIT_ONSTACK and DECLARE_WAIT_QUEUE_HEAD_ONSTACK) so I guess workqueues should do the same thing. s/INIT_WORK_ON_STACK/INIT_WORK_ONSTACK/ s/INIT_DELAYED_WORK_ON_STACK/INIT_DELAYED_WORK_ONSTACK/ Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26replace nested max/min macros with {max,min}3 macroHagen Paul Pfeifer
Use the new {max,min}3 macros to save some cycles and bytes on the stack. This patch substitutes trivial nested macros with their counterpart. Signed-off-by: Hagen Paul Pfeifer <hagen@jauu.net> Cc: Joe Perches <joe@perches.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Hartley Sweeten <hsweeten@visionengravers.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Roland Dreier <rolandd@cisco.com> Cc: Sean Hefty <sean.hefty@intel.com> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26x86: access_error API cleanupMichel Lespinasse
access_error() already takes error_code as an argument, so there is no need for an additional write flag. Signed-off-by: Michel Lespinasse <walken@google.com> Acked-by: Rik van Riel <riel@redhat.com> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Acked-by: Wu Fengguang <fengguang.wu@intel.com> Cc: Ying Han <yinghan@google.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Acked-by: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26mm: retry page fault when blocking on disk transferMichel Lespinasse
This change reduces mmap_sem hold times that are caused by waiting for disk transfers when accessing file mapped VMAs. It introduces the VM_FAULT_ALLOW_RETRY flag, which indicates that the call site wants mmap_sem to be released if blocking on a pending disk transfer. In that case, filemap_fault() returns the VM_FAULT_RETRY status bit and do_page_fault() will then re-acquire mmap_sem and retry the page fault. It is expected that the retry will hit the same page which will now be cached, and thus it will complete with a low mmap_sem hold time. Tests: - microbenchmark: thread A mmaps a large file and does random read accesses to the mmaped area - achieves about 55 iterations/s. Thread B does mmap/munmap in a loop at a separate location - achieves 55 iterations/s before, 15000 iterations/s after. - We are seeing related effects in some applications in house, which show significant performance regressions when running without this change. [akpm@linux-foundation.org: fix warning & crash] Signed-off-by: Michel Lespinasse <walken@google.com> Acked-by: Rik van Riel <riel@redhat.com> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Reviewed-by: Wu Fengguang <fengguang.wu@intel.com> Cc: Ying Han <yinghan@google.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Acked-by: "H. Peter Anvin" <hpa@zytor.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26perf, x86: Fix up kmap_atomic() typePeter Zijlstra
Now that the KM_type stuff is history, clean up the compiler warning. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Chris Metcalf <cmetcalf@tilera.com> Cc: David Howells <dhowells@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Rik van Riel <riel@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: David Miller <davem@davemloft.net> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26mm: remove pte_*map_nested()Peter Zijlstra
Since we no longer need to provide KM_type, the whole pte_*map_nested() API is now redundant, remove it. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Chris Metcalf <cmetcalf@tilera.com> Cc: David Howells <dhowells@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Rik van Riel <riel@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: David Miller <davem@davemloft.net> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26mm: stack based kmap_atomic()Peter Zijlstra
Keep the current interface but ignore the KM_type and use a stack based approach. The advantage is that we get rid of crappy code like: #define __KM_PTE \ (in_nmi() ? KM_NMI_PTE : \ in_irq() ? KM_IRQ_PTE : \ KM_PTE0) and in general can stop worrying about what context we're in and what kmap slots might be appropriate for that. The downside is that FRV kmap_atomic() gets more expensive. For now we use a CPP trick suggested by Andrew: #define kmap_atomic(page, args...) __kmap_atomic(page) to avoid having to touch all kmap_atomic() users in a single patch. [ not compiled on: - mn10300: the arch doesn't actually build with highmem to begin with ] [akpm@linux-foundation.org: coding-style fixes] [akpm@linux-foundation.org: fix up drivers/gpu/drm/i915/intel_overlay.c] Acked-by: Rik van Riel <riel@redhat.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Chris Metcalf <cmetcalf@tilera.com> Cc: David Howells <dhowells@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: David Miller <davem@davemloft.net> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Dave Airlie <airlied@linux.ie> Cc: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-26x86: allocate space within a region top-downBjorn Helgaas
Request that allocate_resource() use available space from high addresses first, rather than the default of using low addresses first. The most common place this makes a difference is when we move or assign new PCI device resources. Low addresses are generally scarce, so it's better to use high addresses when possible. This follows Windows practice for PCI allocation. Reference: https://bugzilla.kernel.org/show_bug.cgi?id=16228#c42 Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-10-26x86: update iomem_resource end based on CPU physical address capabilitiesBjorn Helgaas
The iomem_resource map reflects the available physical address space. We statically initialize the end to -1, i.e., 0xffffffff_ffffffff, but of course we can only use as much as the CPU can address. This patch updates the end based on the CPU capabilities, so we don't mistakenly allocate space that isn't usable, as we're likely to do when allocating from the top-down. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-10-26x86/PCI: allocate space from the end of a region, not the beginningBjorn Helgaas
Allocate from the end of a region, not the beginning. For example, if we need to allocate 0x800 bytes for a device on bus 0000:00 given these resources: [mem 0xbff00000-0xdfffffff] PCI Bus 0000:00 [mem 0xc0000000-0xdfffffff] PCI Bus 0000:02 the available space at [mem 0xbff00000-0xbfffffff] is passed to the alignment callback (pcibios_align_resource()). Prior to this patch, we would put the new 0x800 byte resource at the beginning of that available space, i.e., at [mem 0xbff00000-0xbff007ff]. With this patch, we put it at the end, at [mem 0xbffff800-0xbfffffff]. Reference: https://bugzilla.kernel.org/show_bug.cgi?id=16228#c41 Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2010-10-26x86, uv: Enable Westmere support on SGI UVRuss Anderson
Enable Westmere support on SGI UV. The UV initialization code is dependent on the APICID bits. Westmere-EX uses different APIC bit mapping than Nehalem-EX. This code reads the apic shift value from a UV MMR to do the proper bit decoding to determint the pnode. Signed-off-by: Russ Anderson <rja@sgi.com> LKML-Reference: <20101026212728.GB15071@sgi.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2010-10-26xen: initialize cpu masks for pv guests in xen_smp_initStefano Stabellini
Pv guests don't have ACPI and need the cpu masks to be set correctly as early as possible so we call xen_fill_possible_map from xen_smp_init. On the other hand the initial domain supports ACPI so in this case we skip xen_fill_possible_map and rely on it. However Xen might limit the number of cpus usable by the domain, so we filter those masks during smp initialization using the VCPUOP_is_up hypercall. It is important that the filtering is done before xen_setup_vcpu_info_placement. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
2010-10-26Merge branch 'hwpoison' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6 * 'hwpoison' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6: (22 commits) Add _addr_lsb field to ia64 siginfo Fix migration.c compilation on s390 HWPOISON: Remove retry loop for try_to_unmap HWPOISON: Turn addr_valid from bitfield into char HWPOISON: Disable DEBUG by default HWPOISON: Convert pr_debugs to pr_info HWPOISON: Improve comments in memory-failure.c x86: HWPOISON: Report correct address granuality for huge hwpoison faults Encode huge page size for VM_FAULT_HWPOISON errors Fix build error with !CONFIG_MIGRATION hugepage: move is_hugepage_on_freelist inside ifdef to avoid warning Clean up __page_set_anon_rmap HWPOISON, hugetlb: fix unpoison for hugepage HWPOISON, hugetlb: soft offlining for hugepage HWPOSION, hugetlb: recover from free hugepage error when !MF_COUNT_INCREASED hugetlb: move refcounting in hugepage allocation inside hugetlb_lock HWPOISON, hugetlb: add free check to dequeue_hwpoison_huge_page() hugetlb: hugepage migration core hugetlb: redefine hugepage copy functions hugetlb: add allocate function for hugepage migration ...
2010-10-26Merge branch 'next' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq: [CPUFREQ]: x86, cpufreq: Mark longrun_get_policy with __cpuinit. [CPUFREQ] add sampling_down_factor tunable to improve ondemand performance [CPUFREQ] arch/x86/kernel/cpu/cpufreq: Fix unsigned return type [CPUFREQ] drivers/cpufreq: Adjust confusing if indentation
2010-10-25xen: include xen/xen.h for definition of xen_initial_domain()Ian Campbell
CC arch/x86/xen/setup.o arch/x86/xen/setup.c: In function 'xen_memory_setup': arch/x86/xen/setup.c:161: error: implicit declaration of function 'xen_initial_domain' Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
2010-10-25x86-32, mm: Remove duplicated #includeBorislav Petkov
b40827fa7268fda8a62490728a61c2856f33830b added an include directive which is needless and is taken care of by a previous one. Remove it. Caught-by: Jaswinder Singh Rajput <jaswinderlinux@gmail.com> Signed-off-by: Borislav Petkov <bp@alien8.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Jaswinder Singh Rajput <jaswinderlinux@gmail.com> Cc: H. Peter Anvin <hpa@linux.intel.com> LKML-Reference: <20101025162523.GA4712@a1.tnic> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-10-25Merge branch 'linus' into x86/urgentIngo Molnar
Merge reason: We want to queue up a dependent fix. Signed-off-by: Ingo Molnar <mingo@elte.hu>