Daniel Glöckner ab9e18587f x86, math-emu: fix init_fpu for task != current ...

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>

2009-03-04 20:33:16 +01:00

..

acpi

x86_64: Fix S3 fail path

2009-02-21 21:58:18 -05:00

cpu

x86, mce: remove incorrect __cpuinit for mce_cpu_features()

2009-02-20 23:40:40 -08:00

.gitignore

arch/x86/kernel/.gitignore: Added vmlinux.lds to .gitignore file because it shouldn't be tracked.

2008-07-10 10:13:51 -07:00

alternative.c

x86: improve UP kernel when CPU-hotplug and SMP is enabled

2008-10-13 10:33:46 +02:00

amd_iommu_init.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/linux-2.6-iommu

2009-01-03 12:03:52 -08:00

amd_iommu.c

AMD IOMMU: remove now unnecessary #ifdefs

2009-01-03 16:44:15 +01:00

aperture_64.c

aperture_64.c: clarify that too small aperture is valid reason for this code

2008-11-28 15:24:39 +01:00

apic.c

x86, mce: fix ifdef for 64bit thermal apic vector clear on shutdown

2009-02-17 15:24:34 -08:00

apm_32.c

PM: Split up sysdev_[suspend|resume] from device_power_[down|up]

2009-02-22 10:33:44 -08:00

asm-offsets_32.c

x86: signal: move sigframe.h to arch/x86/include/asm

2008-12-18 11:28:54 +01:00

asm-offsets_64.c

x86: asm-offset_64: use rt_sigframe_ia32

2008-12-18 15:01:24 -08:00

asm-offsets.c

…

audit_64.c

…

bios_uv.c

x86: bios_uv.c: uv_systab should be static

2008-12-29 22:08:28 -08:00

bootflag.c

…

check.c

x86: corruption-check: some post-move cleanups

2008-10-27 18:09:45 +01:00

cpuid.c

Merge branch 'cpus4096-for-linus-3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-01-03 12:04:39 -08:00

crash_dump_32.c

kdump: make elfcorehdr_addr independent of CONFIG_PROC_VMCORE

2008-10-20 08:52:39 -07:00

crash_dump_64.c

kdump: make elfcorehdr_addr independent of CONFIG_PROC_VMCORE

2008-10-20 08:52:39 -07:00

crash.c

kdump: forcibly disable VMX and SVM on machine_crash_shutdown()

2008-12-31 16:52:30 +02:00

doublefault_32.c

x86: fix virt_addr_valid() with CONFIG_DEBUG_VIRTUAL=y, v2

2008-10-13 10:33:15 +02:00

ds.c

x86, ds, bts: cleanup/fix DS configuration

2009-01-22 14:35:00 +01:00

dumpstack_32.c

ftrace: print real return in dumpstack for function graph

2008-12-03 08:56:25 +01:00

dumpstack_64.c

ftrace: print real return in dumpstack for function graph

2008-12-03 08:56:25 +01:00

dumpstack.c

ftrace: print real return in dumpstack for function graph

2008-12-03 08:56:25 +01:00

dumpstack.h

ftrace: print real return in dumpstack for function graph

2008-12-03 08:56:25 +01:00

e820.c

Merge branch 'linus' into release

2009-01-09 03:39:43 -05:00

early_printk.c

x86: early_printk - use sizeof instead of hardcoded number

2009-01-02 10:27:46 +01:00

early-quirks.c

x86: only scan the root bus in early PCI quirks

2009-01-09 12:46:22 -08:00

efi_32.c

x86: fix i486 suspend to disk CR4 oops

2008-08-18 08:50:19 +02:00

efi_64.c

x86: EFI: Back efi_ioremap with init_memory_mapping instead of FIX_MAP

2009-03-04 19:20:16 +01:00

efi_stub_32.S

…

efi_stub_64.S

…

efi.c

x86: EFI: Back efi_ioremap with init_memory_mapping instead of FIX_MAP

2009-03-04 19:20:16 +01:00

entry_32.S

Revert "i386: add TRACE_IRQS_OFF for the nmi"

2009-01-12 19:36:59 +01:00

entry_64.S

x86: push old stack address on irqstack for unwinder

2009-02-02 21:18:03 -08:00

es7000_32.c

Merge branch 'linus' into x86/quirks

2008-12-08 15:07:49 +01:00

ftrace.c

tracing, x86: fix constraint for parent variable

2009-02-11 10:06:13 +01:00

genapic_64.c

x86: fix wakeup_cpu with numaq/es7000, v2, fix

2008-11-18 00:27:24 +01:00

genapic_flat_64.c

x86: fix cpu_mask_to_apicid_and to include cpu_online_mask

2008-12-18 11:59:24 +01:00

genx2apic_cluster.c

x86: use logical apicid in x2apic_cluster's x2apic_cpu_mask_to_apicid_and()

2008-12-23 22:37:30 +01:00

genx2apic_phys.c

Merge branch 'linus' into x86/cleanups

2009-01-02 22:41:36 +01:00

genx2apic_uv_x.c

Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumask into merge-rr-cpumask

2009-01-03 18:53:31 +01:00

geode_32.c

x86, geode: add a VSA2 ID for General Software

2008-06-19 14:19:03 +02:00

head32.c

x86: change static allocation of trampoline area

2008-12-08 13:49:45 +01:00

head64.c

x86: fix incorrect __read_mostly on _boot_cpu_pda

2009-01-02 17:16:29 +01:00

head_32.S

x86, cpa: rename PTE attribute macros for kernel direct mapping in early boot

2008-10-10 19:29:11 +02:00

head_64.S

x86: fix RIP printout in early_idt_handler

2009-01-04 10:20:29 +01:00

head.c

x86, debug: remove EBDA debug printk

2008-12-12 11:08:42 +01:00

hpet.c

Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-02-17 14:27:39 -08:00

i386_ksyms_32.c

ftrace: rename FTRACE to FUNCTION_TRACER

2008-10-20 18:27:03 +02:00

i387.c

x86, math-emu: fix init_fpu for task != current

2009-03-04 20:33:16 +01:00

i8237.c

i8327: fix outb() parameter order

2009-02-10 13:13:23 +01:00

i8253.c

cpumask: convert struct clock_event_device to cpumask pointers.

2008-12-13 21:20:26 +10:30

i8259.c

x86: i8259.c fix style problems

2009-01-04 18:19:37 +01:00

init_task.c

take init_fs to saner place

2008-12-31 18:07:42 -05:00

io_apic.c

x86: find nr_irqs_gsi with mp_ioapic_routing

2009-02-09 12:42:59 +01:00

io_delay.c

x86: add io delay quirk for Presario F700

2008-09-03 16:42:51 -07:00

ioport.c

x86: ioport.c fix style problems

2009-01-04 13:23:07 +01:00

ipi.c

x86: cosmetic changes apic-related files.

2008-12-16 17:40:57 -08:00

irq_32.c

x86: irq_32.c fix style problems

2009-01-04 18:19:37 +01:00

irq_64.c

x86: irq_64.c fix style problems

2009-01-04 13:23:04 +01:00

irq.c

x86: irq.c fix style problems

2009-01-04 13:23:04 +01:00

irqinit_32.c

x86/Voyager: make it build and boot

2009-01-31 18:26:07 +01:00

irqinit_64.c

x86: irqinit_64.c init_ISA_irqs should be static

2009-01-04 18:19:41 +01:00

k8.c

x86, gart: fix gart detection for Fam11h CPUs

2008-10-28 17:10:27 +01:00

kdebugfs.c

arch/x86/kernel/kdebugfs.c: introduce missing kfree

2008-09-10 14:03:49 +02:00

kgdb.c

kgdb, x86: Avoid invoking kgdb_nmicallback twice per NMI

2008-10-06 13:50:59 -05:00

kprobes.c

kprobes: check CONFIG_FREEZER instead of CONFIG_PM

2009-01-16 14:32:17 -05:00

kvm.c

x86, paravirt_ops: use unsigned long instead of u32 for alloc_p*() pfn args

2008-08-22 05:34:44 +02:00

kvmclock.c

x86: KVM guest: kvm_get_tsc_khz: return khz, not lpj

2008-12-31 16:55:44 +02:00

ldt.c

x86: ldt.c fix style problems

2009-01-02 17:46:24 +01:00

machine_kexec_32.c

kexec/i386: setup kexec page table in C

2008-10-31 10:01:57 +01:00

machine_kexec_64.c

kexec jump

2008-07-26 12:00:04 -07:00

Makefile

Merge branch 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2008-12-30 16:10:19 -08:00

mca_32.c

x86: coding style fixes to arch/x86/kernel/mca_32.c

2008-04-17 17:40:49 +02:00

mfgpt_32.c

trivial: fix then -> than typos in comments and documentation

2009-01-06 11:28:06 +01:00

microcode_amd.c

x86: fix warning in arch/x86/kernel/microcode_amd.c

2008-12-19 01:31:54 +01:00

microcode_core.c

Merge branches 'x86/apic', 'x86/cleanups', 'x86/cpufeature', 'x86/crashdump', 'x86/debug', 'x86/defconfig', 'x86/detect-hyper', 'x86/doc', 'x86/dumpstack', 'x86/early-printk', 'x86/fpu', 'x86/idle', 'x86/io', 'x86/memory-corruption-check', 'x86/microcode', 'x86/mm', 'x86/mtrr', 'x86/nmi-watchdog', 'x86/pat2', 'x86/pci-ioapic-boot-irq-quirks', 'x86/ptrace', 'x86/quirks', 'x86/reboot', 'x86/setup-memory', 'x86/signal', 'x86/sparse-fixes', 'x86/time', 'x86/uv' and 'x86/xen' into x86/core

2008-12-23 16:27:23 +01:00

microcode_intel.c

Merge branches 'x86/apic', 'x86/cleanups', 'x86/cpufeature', 'x86/crashdump', 'x86/debug', 'x86/defconfig', 'x86/detect-hyper', 'x86/doc', 'x86/dumpstack', 'x86/early-printk', 'x86/fpu', 'x86/idle', 'x86/io', 'x86/memory-corruption-check', 'x86/microcode', 'x86/mm', 'x86/mtrr', 'x86/nmi-watchdog', 'x86/pat2', 'x86/pci-ioapic-boot-irq-quirks', 'x86/ptrace', 'x86/quirks', 'x86/reboot', 'x86/setup-memory', 'x86/signal', 'x86/sparse-fixes', 'x86/time', 'x86/uv' and 'x86/xen' into x86/core

2008-12-23 16:27:23 +01:00

mmconf-fam10h_64.c

x86, pci: move arch/x86/pci/pci.h to arch/x86/include/asm/pci_x86.h

2008-12-29 18:17:36 +01:00

module_32.c

…

module_64.c

PAGE_ALIGN(): correctly handle 64-bit values on 32-bit architectures

2008-07-24 10:47:21 -07:00

mpparse.c

x86: fix mpparse.c build error on latest git

2009-01-12 19:24:22 +01:00

msr.c

x86: cleanup some remaining usages of NR_CPUS where s/b nr_cpu_ids

2009-01-03 19:00:55 +01:00

nmi.c

x86: remove duplicated #include's

2009-01-06 13:34:03 +01:00

numaq_32.c

x86: rename all fields of mpc_oemtable oem_X to X

2009-01-05 14:08:34 +01:00

olpc.c

x86, olpc: fix model detection without OFW

2009-02-14 23:05:25 +01:00

paravirt_patch_32.c

x86: coding style fixes to arch/x86/kernel/paravirt_patch_32.c

2008-08-15 16:53:25 +02:00

paravirt_patch_64.c

x86/paravirt: add sysret/sysexit pvops for returning to 32-bit compatibility userspace

2008-07-08 13:15:52 +02:00

paravirt-spinlocks.c

x86: fix default_spin_lock_flags() prototype

2008-12-08 16:08:29 +01:00

paravirt.c

x86: warn if arch_flush_lazy_mmu_cpu is called in preemptible context

2009-02-12 23:11:58 +01:00

pci-calgary_64.c

arch/x86/kernel/pci-calgary_64.c: change simple_strtol to simple_strtoul

2008-11-25 15:56:03 +01:00

pci-dma.c

PCI: struct device - replace bus_id with dev_name(), dev_set_name()

2009-01-07 11:12:23 -08:00

pci-gart_64.c

Documentation: move DMA-mapping.txt to Doc/PCI/

2009-01-29 18:19:29 -08:00

pci-nommu.c

x86: export pci-nommu's alloc_coherent

2008-09-25 11:02:25 +02:00

pci-swiotlb_64.c

Merge branch 'core/iommu' into core/urgent

2009-01-05 14:17:24 +01:00

pcspeaker.c

x86: use platform_device_register_simple()

2008-09-22 12:58:36 +02:00

pmtimer_64.c

…

probe_roms_32.c

x86: seperate probe_roms into another file

2008-07-08 12:50:05 +02:00

process_32.c

x86, rcu: fix strange load average and ksoftirqd behavior

2009-02-17 22:47:45 +01:00

process_64.c

x86, 64-bit: print DMI info in the oops trace

2009-02-04 22:10:12 +01:00

process.c

x86: add clflush before monitor for Intel 7400 series

2009-02-09 11:15:15 +01:00

ptrace.c

x86-64: syscall-audit: fix 32/64 syscall hole

2009-03-02 15:41:30 -08:00

pvclock.c

x86: pvclock: fix shadowed variable warning

2008-10-15 14:25:14 +02:00

quirks.c

x86: enable HPET on Fujitsu u9200

2008-12-16 20:36:44 +01:00

reboot_fixups_32.c

x86: constify data in reboot.c

2008-05-25 08:58:30 +02:00

reboot.c

Merge branch 'cpus4096-for-linus-3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-01-03 12:04:39 -08:00

relocate_kernel_32.S

kexec/i386: setup kexec page table in C

2008-10-31 10:01:57 +01:00

relocate_kernel_64.S

x86: relocate_kernel - use predefined macroses for page attributes

2008-04-17 17:41:29 +02:00

rtc.c

rtc: use bcd2bin/bin2bcd

2008-10-20 08:52:41 -07:00

scx200_32.c

…

setup_percpu.c

x86: fix section mismatch warnings in kernel/setup_percpu.c

2009-01-18 23:59:22 +01:00

setup.c

x86: fix DMI on EFI

2009-03-04 18:55:56 +01:00

signal.c

Revert "x86: signal: change type of paramter for sys_rt_sigreturn()"

2009-01-21 09:43:18 +01:00

smp.c

Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-01-10 06:13:09 -08:00

smpboot.c

Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-01-10 06:13:09 -08:00

smpcommon.c

x86: change init_gdt to update the gdt via write_gdt, rather than a direct write.

2008-08-15 19:16:05 +02:00

stacktrace.c

tracing/stack-tracer: fix style issues

2008-11-23 11:53:48 +01:00

step.c

x86 ptrace: user-sets-TF nits

2008-07-16 12:15:17 -07:00

summit_32.c

x86: mach_summit to summit

2008-07-26 16:31:35 +02:00

sys_i386_32.c

x86: Introducing asm/syscalls.h

2008-07-22 14:35:57 +02:00

sys_x86_64.c

Merge branches 'x86/alternatives', 'x86/cleanups', 'x86/commandline', 'x86/crashdump', 'x86/debug', 'x86/defconfig', 'x86/doc', 'x86/exports', 'x86/fpu', 'x86/gart', 'x86/idle', 'x86/mm', 'x86/mtrr', 'x86/nmi-watchdog', 'x86/oprofile', 'x86/paravirt', 'x86/reboot', 'x86/sparse-fixes', 'x86/tsc', 'x86/urgent' and 'x86/vmalloc' into x86-v28-for-linus-phase1

2008-10-06 18:17:07 +02:00

syscall_64.c

x86: Fix ASM_X86__ header guards

2008-10-22 22:55:23 -07:00

syscall_table_32.S

[CVE-2009-0029] Rename old_readdir to sys_old_readdir

2009-01-14 14:15:15 +01:00

tce_64.c

…

test_nx.c

x86: Explicitly include required header files.

2008-04-17 17:41:15 +02:00

test_rodata.c

…

time_32.c

x86: time_32.c fix style problems

2009-01-04 13:23:05 +01:00

time_64.c

x86: Add IRQF_TIMER to legacy x86 timer interrupt descriptors

2009-02-22 10:27:49 -08:00

tlb_32.c

Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumask into merge-rr-cpumask

2009-01-03 18:53:31 +01:00

tlb_64.c

Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumask into merge-rr-cpumask

2009-01-03 18:53:31 +01:00

tlb_uv.c

x86, UV: cpu_relax in uv_wait_completion

2009-01-15 23:48:20 +01:00

tls.c

x86: Introducing asm/syscalls.h

2008-07-22 14:35:57 +02:00

tls.h

…

topology.c

…

trampoline_32.S

x86: trampoline_32.S - switch to .cpuinit.data

2008-04-26 17:35:47 +02:00

trampoline_64.S

x86: move suspend wakeup code to C

2008-04-17 17:41:37 +02:00

trampoline.c

x86: change static allocation of trampoline area

2008-12-08 13:49:45 +01:00

traps.c

x86, vm86: fix preemption bug

2009-02-15 10:46:13 +01:00

tsc_sync.c

Merge branches 'x86/apic', 'x86/cleanups', 'x86/cpufeature', 'x86/crashdump', 'x86/debug', 'x86/defconfig', 'x86/detect-hyper', 'x86/doc', 'x86/dumpstack', 'x86/early-printk', 'x86/fpu', 'x86/idle', 'x86/io', 'x86/memory-corruption-check', 'x86/microcode', 'x86/mm', 'x86/mtrr', 'x86/nmi-watchdog', 'x86/pat2', 'x86/pci-ioapic-boot-irq-quirks', 'x86/ptrace', 'x86/quirks', 'x86/reboot', 'x86/setup-memory', 'x86/signal', 'x86/sparse-fixes', 'x86/time', 'x86/uv' and 'x86/xen' into x86/core

2008-12-23 16:27:23 +01:00

tsc.c

Merge branches 'x86/apic', 'x86/cleanups', 'x86/cpufeature', 'x86/crashdump', 'x86/debug', 'x86/defconfig', 'x86/detect-hyper', 'x86/doc', 'x86/dumpstack', 'x86/early-printk', 'x86/fpu', 'x86/idle', 'x86/io', 'x86/memory-corruption-check', 'x86/microcode', 'x86/mm', 'x86/mtrr', 'x86/nmi-watchdog', 'x86/pat2', 'x86/pci-ioapic-boot-irq-quirks', 'x86/ptrace', 'x86/quirks', 'x86/reboot', 'x86/setup-memory', 'x86/signal', 'x86/sparse-fixes', 'x86/time', 'x86/uv' and 'x86/xen' into x86/core

2008-12-23 16:27:23 +01:00

uv_irq.c

x86, UV: add uv_setup_irq() and uv_teardown_irq() functions, v3, fix

2008-10-16 16:53:13 +02:00

uv_sysfs.c

x86: Add sysfs entries for UV v4

2008-10-16 16:53:13 +02:00

verify_cpu_64.S

…

visws_quirks.c

x86: rename all fields of mpc_cpu mpc_X to X

2009-01-05 14:08:33 +01:00

vm86_32.c

x86: Introducing asm/syscalls.h

2008-07-22 14:35:57 +02:00

vmi_32.c

x86, vmi: put a missing paravirt_release_pmd in pgd_dtor

2009-02-09 13:10:13 +01:00

vmiclock_32.c

x86: Add IRQF_TIMER to legacy x86 timer interrupt descriptors

2009-02-22 10:27:49 -08:00

vmlinux_32.lds.S

tracing/function-graph-tracer: add a new .irqentry.text section, fix

2008-12-12 12:14:05 +01:00

vmlinux_64.lds.S

tracing/function-graph-tracer: add a new .irqentry.text section

2008-12-12 11:14:07 +01:00

vmlinux.lds.S

…

vsmp_64.c

x86: two trivial sparse annotations

2008-10-29 08:02:28 +01:00

vsyscall_64.c

Merge branch 'tracing-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2008-12-28 12:21:10 -08:00

x8664_ksyms_64.c

ftrace: rename FTRACE to FUNCTION_TRACER

2008-10-20 18:27:03 +02:00

xsave.c

x86: xsave.c: restore_user_xstate should be static

2008-12-30 13:31:41 -08:00