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d9a89a26e0
linux/arch/x86/kernel
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Tejun Heo d9a89a26e0 x86: add %gs accessors for x86_32 
Impact: cleanup

On x86_32, %gs is handled lazily.  It's not saved and restored on
kernel entry/exit but only when necessary which usually is during task
switch but there are few other places.  Currently, it's done by
calling savesegment() and loadsegment() explicitly.  Define
get_user_gs(), set_user_gs() and task_user_gs() and use them instead.

While at it, clean up register access macros in signal.c.

This cleans up code a bit and will help future changes.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-02-10 00:41:58 +01:00
..
acpi Merge branch 'x86/urgent' into core/percpu 2009-02-10 00:41:02 +01:00
cpu Merge branch 'x86/urgent' into core/percpu 2009-02-10 00:41:02 +01:00
.gitignore
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 Merge commit 'v2.6.29-rc4' into core/percpu 2009-02-09 14:58:11 +01:00
apm_32.c x86: update Alan Cox's email addresses 2009-01-05 15:19:16 +01:00
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: remove pda.h 2009-01-20 12:29:20 +09:00
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 x86: smp.h move safe_smp_processor_id declartion to cpu.h 2009-01-07 21:48:25 +01:00
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 x86-64: Move current task from PDA to per-cpu and consolidate with 32-bit. 2009-01-19 00:38:58 +09:00
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: remove include of apic.h from hardirq_64.h 2009-01-23 11:03:29 +09:00
efi_stub_32.S
efi_stub_64.S
efi.c x86: make UV support configurable 2009-01-21 13:00:42 +01:00
entry_32.S x86: use asm .macro instead of cpp #define in entry_32.S 2009-02-10 00:41:57 +01:00
entry_64.S Merge commit 'v2.6.29-rc4' into core/percpu 2009-02-09 14:58:11 +01:00
es7000_32.c Merge branch 'linus' into x86/quirks 2008-12-08 15:07:49 +01:00
ftrace.c tracing/function-graph-tracer: append the tracing_graph_flag 2008-12-08 15:11:45 +01:00
genapic_64.c x86: make UV support configurable 2009-01-21 13:00:42 +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 x86: uv cleanup 2009-01-21 17:26:06 +09:00
geode_32.c
head32.c x86: change static allocation of trampoline area 2008-12-08 13:49:45 +01:00
head64.c x86: remove pda_init() 2009-01-20 12:29:19 +09:00
head_32.S x86: set %fs to __KERNEL_PERCPU unconditionally for x86_32 2009-01-21 17:26:05 +09:00
head_64.S x86: use linker to offset symbols by __per_cpu_load 2009-02-09 10:30:30 +01:00
head.c x86, debug: remove EBDA debug printk 2008-12-12 11:08:42 +01:00
hpet.c debugobjects: add and use INIT_WORK_ON_STACK 2009-01-22 10:02:07 +01:00
i386_ksyms_32.c ftrace: rename FTRACE to FUNCTION_TRACER 2008-10-20 18:27:03 +02:00
i387.c x86: fix __cpuinit/__init tangle in init_thread_xstate() 2008-11-20 16:43:41 +01:00
i8237.c
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 Merge branch 'x86/urgent' into core/percpu 2009-02-10 00:41:02 +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 cpumask: update irq_desc to use cpumask_var_t 2009-01-11 19:12:46 +01:00
irq_64.c x86: remove include of apic.h from hardirq_64.h 2009-01-23 11:03:29 +09:00
irq.c x86-64: Move irq stats from PDA to per-cpu and consolidate with 32-bit. 2009-01-19 00:38:57 +09:00
irqinit_32.c Merge commit 'v2.6.29-rc4' into core/percpu 2009-02-09 14:58:11 +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
Makefile x86: initialize per-cpu GDT segment in per-cpu setup 2009-01-27 12:56:48 +09:00
mca_32.c
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 x86: microcode_intel.c fix style problems 2009-01-12 11:22:40 +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 x86: module_32.c fix style problems 2009-01-12 11:22:55 +01:00
module_64.c x86: module_64.c fix style problems 2009-01-12 11:23:01 +01:00
mpparse.c Merge branches 'cpus4096', 'x86/cleanups' and 'x86/urgent' into x86/percpu 2009-01-15 13:18:57 +01:00
msr.c x86: msr.c fix style problems 2009-01-12 11:22:50 +01:00
nmi.c x86-64: Move irq stats from PDA to per-cpu and consolidate with 32-bit. 2009-01-19 00:38:57 +09:00
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 endian bug in openfirmware workaround 2008-09-24 10:29:04 +02:00
paravirt_patch_32.c x86/pvops: add a paravirt_ident functions to allow special patching 2009-01-30 14:51:44 -08:00
paravirt_patch_64.c x86/pvops: add a paravirt_ident functions to allow special patching 2009-01-30 14:51:44 -08:00
paravirt-spinlocks.c x86: remove byte locks 2009-01-20 17:14:28 +01:00
paravirt.c x86/paravirt: use callee-saved convention for pte_val/make_pte/etc 2009-01-30 14:51:45 -08:00
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
process_32.c x86: add %gs accessors for x86_32 2009-02-10 00:41:58 +01:00
process_64.c Merge branch 'x86/urgent' into core/percpu 2009-02-10 00:41:02 +01:00
process.c x86: add clflush before monitor for Intel 7400 series 2009-02-09 11:15:15 +01:00
ptrace.c x86: add %gs accessors for x86_32 2009-02-10 00:41:58 +01:00
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
reboot.c x86: smp.h move safe_smp_processor_id declartion to cpu.h 2009-01-07 21:48:25 +01:00
relocate_kernel_32.S kexec/i386: setup kexec page table in C 2008-10-31 10:01:57 +01:00
relocate_kernel_64.S
rtc.c rtc: use bcd2bin/bin2bcd 2008-10-20 08:52:41 -07:00
scx200_32.c
setup_percpu.c x86: pass in cpu number to switch_to_new_gdt() 2009-01-31 14:28:50 +09:00
setup.c Merge branch 'x86/urgent' into core/percpu 2009-02-10 00:41:02 +01:00
signal.c x86: add %gs accessors for x86_32 2009-02-10 00:41:58 +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 x86: pass in cpu number to switch_to_new_gdt() 2009-01-31 14:28:50 +09:00
stacktrace.c tracing/stack-tracer: fix style issues 2008-11-23 11:53:48 +01:00
step.c
summit_32.c
sys_i386_32.c
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
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: time_64.c fix style problems 2009-01-04 13:23:05 +01:00
tlb_uv.c x86: UV fix uv_flush_send_and_wait() 2009-01-31 14:23:37 +09:00
tls.c
tls.h
topology.c
trampoline_32.S
trampoline_64.S
trampoline.c x86: change static allocation of trampoline area 2008-12-08 13:49:45 +01:00
traps.c Merge branch 'x86/urgent' into core/percpu 2009-02-10 00:41:02 +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: add %gs accessors for x86_32 2009-02-10 00:41:58 +01:00
vmi_32.c Merge branch 'x86/urgent' into core/percpu 2009-02-10 00:41:02 +01:00
vmiclock_32.c cpumask: convert struct clock_event_device to cpumask pointers. 2008-12-13 21:20:26 +10:30
vmlinux_32.lds.S x86: make vmlinux_32.lds.S use PERCPU() macro 2009-01-16 14:19:09 +01:00
vmlinux_64.lds.S x86: use linker to offset symbols by __per_cpu_load 2009-02-09 10:30:30 +01:00
vmlinux.lds.S
vsmp_64.c x86/paravirt: add register-saving thunks to reduce caller register pressure 2009-01-30 14:51:45 -08:00
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 x86: convert pda ops to wrappers around x86 percpu accessors 2009-01-16 14:20:22 +01:00
xsave.c x86: xsave.c: restore_user_xstate should be static 2008-12-30 13:31:41 -08:00