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2010-03-10perf, x86: Fix double enable callsPeter Zijlstra1-0/+4
hw_perf_enable() would enable already enabled events. This causes problems with code that assumes that ->enable/->disable calls are balanced (like the LBR code does). What happens is that events that were already running and left in place would get enabled again. Avoid this by only enabling new events that match their previous assignment. Signed-off-by: Peter Zijlstra <[email protected]> Cc: Arnaldo Carvalho de Melo <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <[email protected]>
2010-03-10perf, x86: Fix double disable callsPeter Zijlstra1-1/+2
hw_perf_enable() would disable events that were not yet enabled. This causes problems with code that assumes that ->enable/->disable calls are balanced (like the LBR code does). What happens is that we disable newly added counters that match their previous assignment, even though they are not yet programmed on the hardware. Avoid this by only doing the first pass over the existing events. Signed-off-by: Peter Zijlstra <[email protected]> Cc: Arnaldo Carvalho de Melo <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <[email protected]>
2010-03-10perf, x86: Properly account n_addedPeter Zijlstra1-2/+2
Make sure n_added is properly accounted so that we can rely on the value to reflect the number of added counters. This is needed if its going to be used for more than a boolean check. Signed-off-by: Peter Zijlstra <[email protected]> Cc: Arnaldo Carvalho de Melo <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <[email protected]>
2010-03-10perf, x86: Avoid double disable on throttle vs ioctl(PERF_IOC_DISABLE)Peter Zijlstra2-15/+7
Calling ioctl(PERF_EVENT_IOC_DISABLE) on a thottled counter would result in a double disable, cure this by using x86_pmu_{start,stop} for throttle/unthrottle and teach x86_pmu_stop() to check ->active_mask. Signed-off-by: Peter Zijlstra <[email protected]> Cc: Arnaldo Carvalho de Melo <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <[email protected]>
2010-03-10perf, x86: Fix x86_pmu_startPeter Zijlstra1-13/+10
pmu::start should undo pmu::stop, make it so. Signed-off-by: Peter Zijlstra <[email protected]> Cc: Arnaldo Carvalho de Melo <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <[email protected]>
2010-03-10perf, x86: Use unlocked bitopsPeter Zijlstra3-6/+5
There is no concurrency on these variables, so don't use LOCK'ed ops. As to the intel_pmu_handle_irq() status bit clean, nobody uses that so remove it all together. Signed-off-by: Peter Zijlstra <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: Arnaldo Carvalho de Melo <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
2010-03-10perf, x86: Change x86_pmu.{enable,disable} calling conventionPeter Zijlstra3-33/+38
Pass the full perf_event into the x86_pmu functions so that those may make use of more than the hw_perf_event, and while doing this, remove the superfluous second argument. Signed-off-by: Peter Zijlstra <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: Arnaldo Carvalho de Melo <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
2010-03-10perf, x86: Remove superfluous arguments to x86_perf_event_update()Peter Zijlstra2-13/+8
The second and third argument to x86_perf_event_update() are superfluous since they are simple expressions of the first argument. Hence remove them. Signed-off-by: Peter Zijlstra <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: Arnaldo Carvalho de Melo <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
2010-03-10perf, x86: Remove superfluous arguments to x86_perf_event_set_period()Peter Zijlstra2-9/+8
The second and third argument to x86_perf_event_set_period() are superfluous since they are simple expressions of the first argument. Hence remove them. Signed-off-by: Peter Zijlstra <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: Arnaldo Carvalho de Melo <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
2010-03-10perf, x86, Do not user perf_disable from NMI contextPeter Zijlstra1-6/+5
Explicitly use intel_pmu_{disable,enable}_all() in intel_pmu_handle_irq() to avoid the NMI race conditions in perf_{disable,enable} Signed-off-by: Peter Zijlstra <[email protected]> Cc: Arnaldo Carvalho de Melo <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <[email protected]>
2010-03-10perf: Rework and fix the arch CPU-hotplug hooksPeter Zijlstra3-64/+71
Remove the hw_perf_event_*() hotplug hooks in favour of per PMU hotplug notifiers. This has the advantage of reducing the static weak interface as well as exposing all hotplug actions to the PMU. Use this to fix x86 hotplug usage where we did things in ONLINE which should have been done in UP_PREPARE or STARTING. Signed-off-by: Peter Zijlstra <[email protected]> Cc: Paul Mundt <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: Arnaldo Carvalho de Melo <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
2010-03-10perf: Provide generic perf_sample_data initializationPeter Zijlstra2-6/+3
This makes it easier to extend perf_sample_data and fixes a bug on arm and sparc, which failed to set ->raw to NULL, which can cause crashes when combined with PERF_SAMPLE_RAW. It also optimizes PowerPC and tracepoint, because the struct initialization is forced to zero out the whole structure. Signed-off-by: Peter Zijlstra <[email protected]> Acked-by: Jean Pihet <[email protected]> Reviewed-by: Frederic Weisbecker <[email protected]> Acked-by: David S. Miller <[email protected]> Cc: Jamie Iles <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Stephane Eranian <[email protected]> Cc: [email protected] LKML-Reference: <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
2010-03-09Merge commit 'v2.6.34-rc1' into perf/urgentIngo Molnar66-1190/+3216
Conflicts: tools/perf/util/probe-event.c Merge reason: Pick up -rc1 and resolve the conflict as well. Signed-off-by: Ingo Molnar <[email protected]>
2010-03-08Merge branch 'for-next' into for-linusJiri Kosina7-7/+7
Conflicts: Documentation/filesystems/proc.txt arch/arm/mach-u300/include/mach/debug-macro.S drivers/net/qlge/qlge_ethtool.c drivers/net/qlge/qlge_main.c drivers/net/typhoon.c
2010-03-08x86/amd-iommu: Use helper function to destroy domainJoerg Roedel1-3/+1
In the amd_iommu_domain_destroy the protection_domain_free function is partly reimplemented. The 'partly' is the bug here because the domain is not deleted from the domain list. This results in use-after-free errors and data-corruption. Fix it by just using protection_domain_free instead. Cc: [email protected] Signed-off-by: Joerg Roedel <[email protected]>
2010-03-07sysfs: Use sysfs_attr_init and sysfs_bin_attr_init on dynamic attributesEric W. Biederman1-0/+1
These are the non-static sysfs attributes that exist on my test machine. Fix them to use sysfs_attr_init or sysfs_bin_attr_init as appropriate. It simply requires making a sysfs attribute present to see this. So this is a little bit tedious but otherwise not too bad. Signed-off-by: Eric W. Biederman <[email protected]> Acked-by: WANG Cong <[email protected]> Cc: Tejun Heo <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2010-03-07Driver core: Constify struct sysfs_ops in struct kobj_typeEmese Revfy2-2/+2
Constify struct sysfs_ops. This is part of the ops structure constification effort started by Arjan van de Ven et al. Benefits of this constification: * prevents modification of data that is shared (referenced) by many other structure instances at runtime * detects/prevents accidental (but not intentional) modification attempts on archs that enforce read-only kernel data at runtime * potentially better optimized code as the compiler can assume that the const data cannot be changed * the compiler/linker move const data into .rodata and therefore exclude them from false sharing Signed-off-by: Emese Revfy <[email protected]> Acked-by: David Teigland <[email protected]> Acked-by: Matt Domsch <[email protected]> Acked-by: Maciej Sosnowski <[email protected]> Acked-by: Hans J. Koch <[email protected]> Acked-by: Pekka Enberg <[email protected]> Acked-by: Jens Axboe <[email protected]> Acked-by: Stephen Hemminger <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2010-03-07Merge branch 'x86-mrst-for-linus' of ↵Linus Torvalds14-66/+1157
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-mrst-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (30 commits) x86, mrst: Fix whitespace breakage in apb_timer.c x86, mrst: Fix APB timer per cpu clockevent x86, mrst: Remove X86_MRST dependency on PCI_IOAPIC x86, olpc: Use pci subarch init for OLPC x86, pci: Add arch_init to x86_init abstraction x86, mrst: Add Kconfig dependencies for Moorestown x86, pci: Exclude Moorestown PCI code if CONFIG_X86_MRST=n x86, numaq: Make CONFIG_X86_NUMAQ depend on CONFIG_PCI x86, pci: Add sanity check for PCI fixed bar probing x86, legacy_irq: Remove duplicate vector assigment x86, legacy_irq: Remove left over nr_legacy_irqs x86, mrst: Platform clock setup code x86, apbt: Moorestown APB system timer driver x86, mrst: Add vrtc platform data setup code x86, mrst: Add platform timer info parsing code x86, mrst: Fill in PCI functions in x86_init layer x86, mrst: Add dummy legacy pic to platform setup x86/PCI: Moorestown PCI support x86, ioapic: Add dummy ioapic functions x86, ioapic: Early enable ioapic for timer irq ... Fixed up semantic conflict of new clocksources due to commit 17622339af25 ("clocksource: add argument to resume callback").
2010-03-07Merge branch 'next' of ↵Linus Torvalds3-0/+635
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] Fix cast warning in pcc driver. [CPUFREQ] Processor Clocking Control interface driver
2010-03-07iommu-api: Remove iommu_{un}map_range functionsJoerg Roedel1-48/+0
These functions are not longer used and can be removed savely. There functionality is now provided by the iommu_{un}map functions which are also capable of multiple page sizes. Signed-off-by: Joerg Roedel <[email protected]>
2010-03-07x86/amd-iommu: Implement ->{un}map callbacks for iommu-apiJoerg Roedel1-0/+29
This patch implements the new callbacks for the IOMMU-API with functions that can handle different page sizes in the IOMMU page table. Signed-off-by: Joerg Roedel <[email protected]>
2010-03-07x86/amd-iommu: Make amd_iommu_iova_to_phys aware of multiple page sizesJoerg Roedel1-4/+9
This patch extends the amd_iommu_iova_to_phys() function to handle different page sizes correctly. It doesn't use fetch_pte() anymore because we don't know (or care about) the page_size used for mapping the given iova. Signed-off-by: Joerg Roedel <[email protected]>
2010-03-07x86/amd-iommu: Make iommu_unmap_page and fetch_pte aware of page sizesJoerg Roedel1-18/+72
This patch extends the functionality of iommu_unmap_page and fetch_pte to support arbitrary page sizes. Signed-off-by: Joerg Roedel <[email protected]>
2010-03-07x86/amd-iommu: Make iommu_map_page and alloc_pte aware of page sizesJoerg Roedel1-20/+33
This patch changes the old map_size parameter of alloc_pte to a page_size parameter which can be used more easily to alloc a pte for intermediate page sizes. Signed-off-by: Joerg Roedel <[email protected]>
2010-03-07iommu-api: Rename ->{un}map function pointers to ->{un}map_rangeJoerg Roedel1-2/+2
The new function pointer names match better with the top-level functions of the iommu-api which are using them. Main intention of this change is to make the ->{un}map pointer names free for two new mapping functions. Signed-off-by: Joerg Roedel <[email protected]>
2010-03-06bitops: rename for_each_bit() to for_each_set_bit()Akinobu Mita2-2/+2
Rename for_each_bit to for_each_set_bit in the kernel source tree. To permit for_each_clear_bit(), should that ever be added. The patch includes a macro to map the old for_each_bit() onto the new for_each_set_bit(). This is a (very) temporary thing to ease the migration. [[email protected]: add temporary for_each_bit()] Suggested-by: Alexey Dobriyan <[email protected]> Suggested-by: Andrew Morton <[email protected]> Signed-off-by: Akinobu Mita <[email protected]> Cc: "David S. Miller" <[email protected]> Cc: Russell King <[email protected]> Cc: David Woodhouse <[email protected]> Cc: Artem Bityutskiy <[email protected]> Cc: Stephen Rothwell <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2010-03-05Merge branch 'kvm-updates/2.6.34' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds1-1/+2
* 'kvm-updates/2.6.34' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (145 commits) KVM: x86: Add KVM_CAP_X86_ROBUST_SINGLESTEP KVM: VMX: Update instruction length on intercepted BP KVM: Fix emulate_sys[call, enter, exit]()'s fault handling KVM: Fix segment descriptor loading KVM: Fix load_guest_segment_descriptor() to inject page fault KVM: x86 emulator: Forbid modifying CS segment register by mov instruction KVM: Convert kvm->requests_lock to raw_spinlock_t KVM: Convert i8254/i8259 locks to raw_spinlocks KVM: x86 emulator: disallow opcode 82 in 64-bit mode KVM: x86 emulator: code style cleanup KVM: Plan obsolescence of kernel allocated slots, paravirt mmu KVM: x86 emulator: Add LOCK prefix validity checking KVM: x86 emulator: Check CPL level during privilege instruction emulation KVM: x86 emulator: Fix popf emulation KVM: x86 emulator: Check IOPL level during io instruction emulation KVM: x86 emulator: fix memory access during x86 emulation KVM: x86 emulator: Add Virtual-8086 mode of emulation KVM: x86 emulator: Add group9 instruction decoding KVM: x86 emulator: Add group8 instruction decoding KVM: do not store wqh in irqfd ... Trivial conflicts in Documentation/feature-removal-schedule.txt
2010-03-05x86: fix mtrr missing kernel-docRandy Dunlap1-0/+1
Fix missing kernel-doc notation in mtrr/main.c: Warning(arch/x86/kernel/cpu/mtrr/main.c:152): No description found for parameter 'info' Signed-off-by: Randy Dunlap <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2010-03-05Merge branch 'perf-probes-for-linus-2' of ↵Linus Torvalds2-105/+564
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perf-probes-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: Issue at least one memory barrier in stop_machine_text_poke() perf probe: Correct probe syntax on command line help perf probe: Add lazy line matching support perf probe: Show more lines after last line perf probe: Check function address range strictly in line finder perf probe: Use libdw callback routines perf probe: Use elfutils-libdw for analyzing debuginfo perf probe: Rename probe finder functions perf probe: Fix bugs in line range finder perf probe: Update perf probe document perf probe: Do not show --line option without dwarf support kprobes: Add documents of jump optimization kprobes/x86: Support kprobes jump optimization on x86 x86: Add text_poke_smp for SMP cross modifying code kprobes/x86: Cleanup save/restore registers kprobes/x86: Boost probes when reentering kprobes: Jump optimization sysctl interface kprobes: Introduce kprobes jump optimization kprobes: Introduce generic insn_slot framework kprobes/x86: Cleanup RELATIVEJUMP_INSTRUCTION to RELATIVEJUMP_OPCODE
2010-03-04Merge branch 'perf/urgent' of ↵Ingo Molnar1-2/+8
git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing into perf/urgent
2010-03-04Merge branch 'perf/core' into perf/urgentIngo Molnar20-1420/+2167
Merge reason: Switch from pre-merge topical split to the post-merge urgent track Signed-off-by: Ingo Molnar <[email protected]>
2010-03-04Merge branches 'core/futexes' and 'core/iommu' into core/urgentIngo Molnar1-1/+0
Merge reason: Switch from topical split to the stabilization track Signed-off-by: Ingo Molnar <[email protected]>
2010-03-04x86: Issue at least one memory barrier in stop_machine_text_poke()Masami Hiramatsu1-2/+2
Fix stop_machine_text_poke() to issue smp_mb() before exiting waiting loop, and use cpu_relax() for waiting. Changes in v2: - Don't use ACCESS_ONCE(). Signed-off-by: Masami Hiramatsu <[email protected]> Acked-by: Mathieu Desnoyers <[email protected]> Cc: systemtap <[email protected]> Cc: DLE <[email protected]> Cc: Jason Baron <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
2010-03-03x86, mrst: Fix whitespace breakage in apb_timer.cH. Peter Anvin1-534/+534
Checkin bb24c4716185f6e116c440462c65c1f56649183b: "Moorestown APB system timer driver" suffered from severe whitespace damage in arch/x86/kernel/apb_timer.c due to using Microsoft Lookout to send a patch. Fix the whitespace breakage. Reported-by: Jacob Pan <[email protected]> Signed-off-by: H. Peter Anvin <[email protected]>
2010-03-03x86, mrst: Fix APB timer per cpu clockeventJacob Pan1-4/+8
The current APB timer code incorrectly registers a static copy of the clockevent device for the boot CPU. The per cpu clockevent should be used instead. This bug was hidden by zero-initialized data; as such it did not get exposed in testing, but was discovered by code review. Signed-off-by: Jacob Pan <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: H. Peter Anvin <[email protected]>
2010-03-03Merge branch 'x86-mm-for-linus' of ↵Linus Torvalds2-32/+7
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: resource: Fix broken indentation resource: Fix generic page_is_ram() for partial RAM pages x86, paravirt: Remove kmap_atomic_pte paravirt op. x86, vmi: Disable highmem PTE allocation even when CONFIG_HIGHPTE=y x86, xen: Disable highmem PTE allocation even when CONFIG_HIGHPTE=y
2010-03-03Merge branch 'x86-apic-for-linus' of ↵Linus Torvalds10-163/+212
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (25 commits) x86: Fix out of order of gsi x86: apic: Fix mismerge, add arch_probe_nr_irqs() again x86, irq: Keep chip_data in create_irq_nr and destroy_irq xen: Remove unnecessary arch specific xen irq functions. smp: Use nr_cpus= to set nr_cpu_ids early x86, irq: Remove arch_probe_nr_irqs sparseirq: Use radix_tree instead of ptrs array sparseirq: Change irq_desc_ptrs to static init: Move radix_tree_init() early irq: Remove unnecessary bootmem code x86: Add iMac9,1 to pci_reboot_dmi_table x86: Convert i8259_lock to raw_spinlock x86: Convert nmi_lock to raw_spinlock x86: Convert ioapic_lock and vector_lock to raw_spinlock x86: Avoid race condition in pci_enable_msix() x86: Fix SCI on IOAPIC != 0 x86, ia32_aout: do not kill argument mapping x86, irq: Move __setup_vector_irq() before the first irq enable in cpu online path x86, irq: Update the vector domain for legacy irqs handled by io-apic x86, irq: Don't block IRQ0_VECTOR..IRQ15_VECTOR's on all cpu's ...
2010-03-03Merge branch 'x86-bootmem-for-linus' of ↵Linus Torvalds7-512/+91
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-bootmem-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (30 commits) early_res: Need to save the allocation name in drop_range_partial() sparsemem: Fix compilation on PowerPC early_res: Add free_early_partial() x86: Fix non-bootmem compilation on PowerPC core: Move early_res from arch/x86 to kernel/ x86: Add find_fw_memmap_area Move round_up/down to kernel.h x86: Make 32bit support NO_BOOTMEM early_res: Enhance check_and_double_early_res x86: Move back find_e820_area to e820.c x86: Add find_early_area_size x86: Separate early_res related code from e820.c x86: Move bios page reserve early to head32/64.c sparsemem: Put mem map for one node together. sparsemem: Put usemap for one node together x86: Make 64 bit use early_res instead of bootmem before slab x86: Only call dma32_reserve_bootmem 64bit !CONFIG_NUMA x86: Make early_node_mem get mem > 4 GB if possible x86: Dynamically increase early_res array size x86: Introduce max_early_res and early_res_count ...
2010-03-03Merge branch 'for-linus' of ↵Linus Torvalds3-8/+8
git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu: percpu: add __percpu sparse annotations to what's left percpu: add __percpu sparse annotations to fs percpu: add __percpu sparse annotations to core kernel subsystems local_t: Remove leftover local.h this_cpu: Remove pageset_notifier this_cpu: Page allocator conversion percpu, x86: Generic inc / dec percpu instructions local_t: Move local.h include to ringbuffer.c and ring_buffer_benchmark.c module: Use this_cpu_xx to dynamically allocate counters local_t: Remove cpu_local_xx macros percpu: refactor the code in pcpu_[de]populate_chunk() percpu: remove compile warnings caused by __verify_pcpu_ptr() percpu: make accessors check for percpu pointer in sparse percpu: add __percpu for sparse. percpu: make access macros universal percpu: remove per_cpu__ prefix.
2010-03-03Rename .data.init to .data..init.Denys Vlasenko1-1/+1
Signed-off-by: Denys Vlasenko <[email protected]> Signed-off-by: Michal Marek <[email protected]>
2010-03-03Rename .text.page_aligned to .text..page_aligned.Denys Vlasenko2-2/+2
Signed-off-by: Denys Vlasenko <[email protected]> Signed-off-by: Michal Marek <[email protected]>
2010-03-03Rename .bss.page_aligned to .bss..page_aligned.Tim Abbott1-1/+1
Signed-off-by: Tim Abbott <[email protected]> Cc: Sam Ravnborg <[email protected]> Signed-off-by: Denys Vlasenko <[email protected]> Signed-off-by: Michal Marek <[email protected]>
2010-03-03Rename .data.cacheline_aligned to .data..cacheline_aligned.Tim Abbott1-1/+1
Signed-off-by: Tim Abbott <[email protected]> Cc: Sam Ravnborg <[email protected]> Signed-off-by: Denys Vlasenko <[email protected]> Signed-off-by: Michal Marek <[email protected]>
2010-03-03x86/stacktrace: Don't dereference bad frame pointersFrederic Weisbecker1-2/+8
Callers of a stacktrace might pass bad frame pointers. Those are usually checked for safety in stack walking helpers before any dereferencing, but this is not the case when we need to go through one more frame pointer that backlinks the irq stack to the previous one, as we don't have any reliable address boudaries to compare this frame pointer against. This raises crashes when we record callchains for ftrace events with perf because we don't use the right helpers to capture registers there. We get wrong frame pointers as we call task_pt_regs() even on kernel threads, which is a wrong thing as it gives us the initial state of any kernel threads freshly created. This is even not what we want for user tasks. What we want is a hot snapshot of registers when the ftrace event triggers, not the state before a task entered the kernel. This requires more thoughts to do it correctly though. So first put a guardian to ensure the given frame pointer can be dereferenced to avoid crashes. We'll think about how to fix the callers in a subsequent patch. Signed-off-by: Frederic Weisbecker <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: 2.6.33.x <[email protected]> Cc: Arnaldo Carvalho de Melo <[email protected]>
2010-03-02perf_events, x86: Fixup fixed counter constraintsPeter Zijlstra2-17/+39
Patch 1da53e0230 ("perf_events, x86: Improve x86 event scheduling") lost us one of the fixed purpose counters and then ed8777fc13 ("perf_events, x86: Fix event constraint masks") broke it even further. Widen the fixed event mask to event+umask and specify the full config for each of the 3 fixed purpose counters. Then let the init code fill out the placement for the GP regs based on the cpuid info. Signed-off-by: Peter Zijlstra <[email protected]> Cc: Stephane Eranian <[email protected]> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <[email protected]>
2010-03-02perf, x86: Restrict the ANY flagPeter Zijlstra1-0/+3
The ANY flag can show SMT data of another task (like 'top'), so we want to disable it when system-wide profiling is disabled. Signed-off-by: Peter Zijlstra <[email protected]> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <[email protected]>
2010-03-02x86: Fix sched_clock_cpu for systems with unsynchronized TSCDimitri Sivanich1-1/+2
On UV systems, the TSC is not synchronized across blades. The sched_clock_cpu() function is returning values that can go backwards (I've seen as much as 8 seconds) when switching between cpus. As each cpu comes up, early_init_intel() will currently set the sched_clock_stable flag true. When mark_tsc_unstable() runs, it clears the flag, but this only occurs once (the first time a cpu comes up whose TSC is not synchronized with cpu 0). After this, early_init_intel() will set the flag again as the next cpu comes up. Only set sched_clock_stable if tsc has not been marked unstable. Signed-off-by: Dimitri Sivanich <[email protected]> Acked-by: Venkatesh Pallipadi <[email protected]> Acked-by: Peter Zijlstra <[email protected]> LKML-Reference: <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
2010-03-02i8253: Convert i8253_lock to raw_spinlockThomas Gleixner2-9/+9
i8253_lock needs to be a real spinlock in preempt-rt, i.e. it can not be converted to a sleeping lock. Convert it to raw_spinlock and fix up all users. Signed-off-by: Thomas Gleixner <[email protected]> Acked-by: Ralf Baechle <[email protected]> Acked-by: Dmitry Torokhov <[email protected]> Acked-by: Takashi Iwai <[email protected]> Cc: Jens Axboe <[email protected]> LKML-Reference: <[email protected]>
2010-03-01Merge branch 'acpica' of ↵Linus Torvalds1-3/+3
git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 * 'acpica' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: ACPI: replace acpi_integer by u64 ACPICA: Update version to 20100121. ACPICA: Remove unused uint32_struct type ACPICA: Disassembler: Remove obsolete "Integer64" field in parse object ACPICA: Remove obsolete ACPI_INTEGER (acpi_integer) type ACPICA: Predefined name repair: fix NULL package elements ACPICA: AcpiGetDevices: Eliminate unnecessary _STA calls ACPICA: Update all ACPICA copyrights and signons to 2010 ACPICA: Update for new gcc-4 warning options
2010-03-01Merge branch 'timers-for-linus' of ↵Linus Torvalds2-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: posix-timers.c: Don't export local functions clocksource: start CMT at clocksource resume clocksource: add suspend callback clocksource: add argument to resume callback ntp: Cleanup xtime references in ntp.c ntp: Make time_esterror and time_maxerror static
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