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4f971248bc6ad2bb2a89a25a072ebfec5757d298
linux/arch/x86/kernel
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Andi Kleen 4f971248bc perf/x86/intel/uncore: Fix minor race in box set up 
I was looking for the trinity oops cause in the uncore driver.
(so far didn't found it)

However I found this tiny race: when a box is set up two threads on the
same CPU, they may be setting up the box in parallel (e.g. with kernel
preemption). This could lead to the reference count being increasing
too much. Always recheck there is no existing cpu reference inside the lock.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: eranian@google.com
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Link: http://lkml.kernel.org/r/1411424826-15629-1-git-send-email-andi@firstfloor.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-10-03 06:02:49 +02:00
..
acpi
Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2014-08-13 18:23:32 -06:00
apic
x86, irq, PCI: Keep IRQ assignment for runtime power management
2014-08-29 13:38:00 +02:00
cpu
perf/x86/intel/uncore: Fix minor race in box set up
2014-10-03 06:02:49 +02:00
kprobes
kprobes/x86: Don't try to resolve kprobe faults from userspace
2014-07-16 14:16:32 +02:00
.gitignore
…
alternative.c
kprobes, x86: Allow kprobes on text_poke/hw_breakpoint
2014-04-24 10:03:02 +02:00
amd_gart_64.c
x86: enable DMA CMA with swiotlb
2014-06-04 16:53:57 -07:00
amd_nb.c
Merge tag 'edac_for_3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp
2014-04-01 13:54:00 -07:00
apb_timer.c
intel_mid: Renamed *mrst* to *intel_mid*
2013-10-17 16:40:47 -07:00
aperture_64.c
x86/gart: Tidy messages and add bridge device info
2014-05-23 10:47:19 -06:00
apm_32.c
x86: Remove unused variable "polling"
2014-07-16 12:58:47 +02:00
asm-offsets_32.c
x86: Get rid of ->hard_math and all the FPU asm fu
2013-06-06 14:32:04 -07:00
asm-offsets_64.c
x86, gdt, hibernate: Store/load GDT for hibernate path.
2013-05-02 11:27:35 -07:00
asm-offsets.c
sched, x86: Provide a per-cpu preempt_count implementation
2013-09-25 14:07:57 +02:00
audit_64.c
…
bootflag.c
…
check.c
x86/mm: memblock: switch to use NUMA_NO_NODE
2014-01-21 16:19:47 -08:00
cpuid.c
x86, cpuid: Fix CPU hotplug callback registration
2014-03-20 13:43:42 +01:00
crash_dump_32.c
…
crash_dump_64.c
…
crash.c
kexec: create a new config option CONFIG_KEXEC_FILE for new syscall
2014-08-29 16:28:16 -07:00
devicetree.c
x86, irq, devicetree: Release IOAPIC pin when PCI device is disabled
2014-06-21 23:05:44 +02:00
doublefault.c
x86: Delete non-required instances of include <linux/init.h>
2014-01-06 21:25:18 -08:00
dumpstack_32.c
Merge branch 'x86-threadinfo-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2014-04-01 10:17:18 -07:00
dumpstack_64.c
x86: Fix dumpstack_64 irq stack handling
2014-04-02 11:46:50 -07:00
dumpstack.c
kprobes, x86: Use NOKPROBE_SYMBOL() instead of __kprobes annotation
2014-04-24 10:26:38 +02:00
e820.c
x86/mm: memblock: switch to use NUMA_NO_NODE
2014-01-21 16:19:47 -08:00
early_printk.c
Merge branch 'x86-intel-mid-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-11-12 11:12:22 +09:00
early-quirks.c
Merge commit '9e9a928eed8796a0a1aaed7e0b676db86ba84594' into drm-next
2014-06-05 20:28:59 +10:00
entry_32.S
x86_32, entry: Clean up sysenter_badsys declaration
2014-08-15 13:45:32 -07:00
entry_64.S
Merge branches 'x86-build-for-linus', 'x86-cleanups-for-linus' and 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2014-08-04 16:56:16 -07:00
espfix_64.c
x86/espfix/xen: Fix allocation of pages for paravirt page tables
2014-07-14 13:47:32 -07:00
ftrace.c
ftrace/x86: Add call to ftrace_graph_is_dead() in function graph code
2014-07-17 09:45:08 -04:00
head32.c
asmlinkage, x86: Add explicit __visible to arch/x86/*
2014-05-05 16:07:44 -07:00
head64.c
kernel/printk: use symbolic defines for console loglevels
2014-06-04 16:54:17 -07:00
head_32.S
x86: fix compile error due to X86_TRAP_NMI use in asm files
2014-03-07 18:58:40 -08:00
head_64.S
x86: fix compile error due to X86_TRAP_NMI use in asm files
2014-03-07 18:58:40 -08:00
head.c
x86: Make sure we can boot in the case the BDA contains pure garbage
2013-02-27 13:38:57 -08:00
hpet.c
Merge branch 'x86/vdso' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next
2014-06-05 08:05:29 -07:00
hw_breakpoint.c
kprobes, x86: Allow kprobes on text_poke/hw_breakpoint
2014-04-24 10:03:02 +02:00
i386_ksyms_32.c
sched, x86: Optimize the preempt_schedule() call
2013-09-25 14:23:07 +02:00
i387.c
x86/xsaves: Clear reserved bits in xsave header
2014-05-29 14:33:00 -07:00
i8237.c
…
i8253.c
…
i8259.c
x86, irq, pic: Probe for legacy PIC and set legacy_pic appropriately
2014-04-14 11:49:55 -07:00
io_delay.c
…
ioport.c
x86: get rid of pt_regs argument of iopl(2)
2013-02-03 18:16:24 -05:00
iosf_mbi.c
PCI: Remove DEFINE_PCI_DEVICE_TABLE macro use
2014-08-12 12:15:14 -06:00
irq_32.c
x86, threadinfo: Redo "x86: Use inline assembler to get sp"
2014-03-10 17:32:01 -07:00
irq_64.c
irq: Consolidate do_softirq() arch overriden implementations
2013-10-01 12:53:25 +02:00
irq_work.c
x86, asmlinkage: Make all interrupt handlers asmlinkage / __visible
2013-08-06 14:18:23 -07:00
irq.c
Merge branch 'x86-irq-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2014-06-12 20:03:47 -07:00
irqinit.c
x86: Fix non-PC platform kernel crash on boot due to NULL dereference
2014-08-25 22:36:57 +02:00
jump_label.c
x86/jump_label: expect default_nop if static_key gets enabled on boot-up
2013-10-19 19:45:35 -04:00
kdebugfs.c
arch/x86/kernel/kdebugfs.c: Ensure a consistent return value in error case
2012-07-26 15:07:20 +02:00
kexec-bzimage64.c
kexec: verify the signature of signed PE bzImage
2014-08-08 15:57:33 -07:00
kgdb.c
x86: Delete non-required instances of include <linux/init.h>
2014-01-06 21:25:18 -08:00
ksysfs.c
x86: ksysfs.c build fix
2014-01-03 14:37:13 +00:00
kvm.c
Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2014-06-12 19:18:49 -07:00
kvmclock.c
kvm: remove redundant registration of BSP's hv_clock area
2014-02-22 15:53:32 +01:00
ldt.c
Revert "x86-64, modify_ldt: Make support for 16-bit segments a runtime option"
2014-05-21 10:22:59 -07:00
machine_kexec_32.c
x86: Delete non-required instances of include <linux/init.h>
2014-01-06 21:25:18 -08:00
machine_kexec_64.c
kexec: create a new config option CONFIG_KEXEC_FILE for new syscall
2014-08-29 16:28:16 -07:00
Makefile
kexec: create a new config option CONFIG_KEXEC_FILE for new syscall
2014-08-29 16:28:16 -07:00
mcount_64.S
ftrace: x86: Remove check of obsolete variable function_trace_stop
2014-07-18 13:57:02 -04:00
mmconf-fam10h_64.c
x86: delete __cpuinit usage from all x86 files
2013-07-14 19:36:56 -04:00
module.c
x86, kaslr: fix module lock ordering problem
2014-03-24 10:18:26 -07:00
mpparse.c
x86, apic: Remove mps_oem_check callback
2014-07-31 08:05:42 -07:00
msr.c
x86, msr: Fix CPU hotplug callback registration
2014-03-20 13:43:42 +01:00
nmi_selftest.c
…
nmi.c
kprobes, x86: Use NOKPROBE_SYMBOL() instead of __kprobes annotation
2014-04-24 10:26:38 +02:00
paravirt_patch_32.c
…
paravirt_patch_64.c
x86_64/entry/xen: Do not invoke espfix64 on Xen
2014-07-28 15:25:40 -07:00
paravirt-spinlocks.c
x86, ticketlock: Add slowpath logic
2013-08-09 07:54:00 -07:00
paravirt.c
kprobes, x86: Prohibit probing on native_set_debugreg()/load_idt()
2014-04-24 10:02:58 +02:00
pci-calgary_64.c
x86, calgary: Use 8M TCE table size by default
2014-04-10 19:51:32 -07:00
pci-dma.c
arch/x86/kernel/pci-dma.c: fix dma_generic_alloc_coherent() when CONFIG_DMA_CMA is enabled
2014-06-04 16:53:57 -07:00
pci-iommu_table.c
…
pci-nommu.c
x86: Delete non-required instances of include <linux/init.h>
2014-01-06 21:25:18 -08:00
pci-swiotlb.c
x86: enable DMA CMA with swiotlb
2014-06-04 16:53:57 -07:00
pcspeaker.c
…
perf_regs.c
perf: Fix off by one test in perf_reg_value()
2012-09-19 17:08:40 +02:00
pmc_atom.c
x86/pmc_atom: Silence shift wrapping warnings in pmc_sleep_tmr_show()
2014-08-02 16:52:17 -07:00
preempt.S
sched, x86: Optimize the preempt_schedule() call
2013-09-25 14:23:07 +02:00
probe_roms.c
x86/pci/probe_roms: Add missing __iomem annotation to pci_map_biosrom()
2012-09-05 10:52:25 +02:00
process_32.c
x86: Keep thread_info on thread stack in x86_32
2014-03-06 16:56:55 -08:00
process_64.c
Merge branch 'perf/urgent' into perf/core, to resolve conflict and to prepare for new patches
2014-06-06 07:55:06 +02:00
process.c
Define kernel API to get address of each state in xsave area
2014-05-29 14:33:09 -07:00
ptrace.c
x86: Keep thread_info on thread stack in x86_32
2014-03-06 16:56:55 -08:00
pvclock.c
hung_task: add method to reset detector
2013-11-06 09:49:02 +02:00
quirks.c
x86/amd/numa: Fix northbridge quirk to assign correct NUMA node
2014-03-14 11:05:36 +01:00
reboot_fixups_32.c
…
reboot.c
x86/reboot: Add EFI reboot quirk for ACPI Hardware Reduced flag
2014-07-18 21:23:52 +01:00
relocate_kernel_32.S
x86, asm, cleanup: Replace open-coded control register values with symbolic
2013-06-25 16:26:06 -07:00
relocate_kernel_64.S
x86, reloc: Use xorl instead of xorq in relocate_kernel_64.S
2013-06-20 21:30:04 -07:00
resource.c
x86: don't exclude low BIOS area when allocating address space for non-PCI cards
2014-07-16 12:29:36 -06:00
rtc.c
Merge branch 'x86-intel-mid-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-11-12 11:12:22 +09:00
setup_percpu.c
…
setup.c
arch/x86: Replace plain strings with constants
2014-07-18 21:23:59 +01:00
signal.c
x86_32, signal: Fix vdso rt_sigreturn
2014-06-23 15:54:42 -07:00
smp.c
asmlinkage, x86: Add explicit __visible to arch/x86/*
2014-05-05 16:07:44 -07:00
smpboot.c
x86, apic: Remove setup_portio_remap callback
2014-07-31 08:05:44 -07:00
stacktrace.c
…
step.c
ptrace: ensure arch_ptrace/ptrace_request can never race with SIGKILL
2013-01-22 10:08:00 -08:00
sys_x86_64.c
x86 get_unmapped_area: Access mmap_legacy_base through mm_struct member
2013-08-22 10:19:35 -07:00
syscall_32.c
x86, asmlinkage: Make syscall tables visible
2013-08-06 14:20:18 -07:00
syscall_64.c
x86, asmlinkage: Make syscall tables visible
2013-08-06 14:20:18 -07:00
sysfb_efi.c
x86: sysfb: move EFI quirks from efifb to sysfb
2013-08-02 16:17:47 -07:00
sysfb_simplefb.c
x86/simplefb: Mark framebuffer mem-resources as IORESOURCE_BUSY to avoid bootup warning
2013-10-03 07:51:11 +02:00
sysfb.c
x86: sysfb: move EFI quirks from efifb to sysfb
2013-08-02 16:17:47 -07:00
tboot.c
x86 / tboot / ACPI: Fail extended mode reduced hardware sleep
2013-07-31 14:25:51 +02:00
tce_64.c
…
test_nx.c
…
test_rodata.c
…
time.c
x86: Fix non-PC platform kernel crash on boot due to NULL dereference
2014-08-25 22:36:57 +02:00
tls.c
make SYSCALL_DEFINE<n>-generated wrappers do asmlinkage_protect
2013-03-03 22:58:33 -05:00
tls.h
…
topology.c
hotplug, powerpc, x86: Remove cpu_hotplug_driver_lock()
2013-09-30 19:55:51 +02:00
trace_clock.c
tracing,x86: Add a TSC trace_clock
2012-11-13 15:48:27 -05:00
tracepoint.c
x86: Make sure IDT is page aligned
2013-07-16 15:14:48 -07:00
traps.c
x86/kprobes: Fix build errors and blacklist context_track_user
2014-06-14 09:07:44 +02:00
tsc_msr.c
x86: tsc: Add missing Baytrail frequency to the table
2014-02-19 17:12:24 +01:00
tsc_sync.c
x86: Delete non-required instances of include <linux/init.h>
2014-01-06 21:25:18 -08:00
tsc.c
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2014-08-05 17:46:42 -07:00
uprobes.c
uprobes/x86: Rename arch_uprobe->def to ->defparam, minor comment updates
2014-06-05 16:21:57 +02:00
verify_cpu.S
…
vm86_32.c
x86, vm86: fix VM86 syscalls: use SYSCALL_DEFINEx(...)
2013-05-02 20:36:32 -04:00
vmlinux.lds.S
x86, vdso: Zero-pad the VVAR page
2014-03-18 12:52:44 -07:00
vsmp_64.c
x86/apic/vsmp: Make is_vsmp_box() static
2014-08-01 15:09:45 -07:00
vsyscall_64.c
x86_64/vsyscall: Fix warn_bad_vsyscall log output
2014-07-25 16:34:15 -07:00
vsyscall_emu_64.S
…
vsyscall_gtod.c
timekeeping: Create struct tk_read_base and use it in struct timekeeper
2014-07-23 15:01:53 -07:00
vsyscall_trace.h
…
x86_init.c
PCI: Drop "irq" param from *_restore_msi_irqs()
2013-12-13 08:44:30 -07:00
x8664_ksyms_64.c
sched, x86: Optimize the preempt_schedule() call
2013-09-25 14:23:07 +02:00
xsave.c
x86/xsaves: Clean up code in xstate offsets computation in xsave area
2014-05-30 17:12:41 -07:00