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Thomas Gleixner 250a1ac685 x86, smpboot: Remove pointless preempt_disable() in native_smp_prepare_cpus() 
There is no reason to keep preemption disabled in this function.

We only have two other threads live: kthreadd and idle. Neither of
them is going to preempt. But that preempt_disable forces all the code
inside to do GFP_ATOMIC allocations which is just insane.

Remove it.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Borislav Petkov <bp@alien8.de>
Cc: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: x86@kernel.org
Link: http://lkml.kernel.org/r/20141205084147.153643952@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2014-12-16 14:08:14 +01:00
..
acpi
x86, irq, ACPI: Fix building warning of unused code
2014-12-16 14:08:14 +01:00
apic
x86: Avoid building unused IRQ entry stubs
2014-12-16 14:08:14 +01:00
cpu
Merge branch 'x86-microcode-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2014-12-10 15:01:43 -08:00
kprobes
x86: Remove arbitrary instruction size limit in instruction decoder
2014-11-18 00:58:52 +01:00
.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
x86, amd_nb: Add device IDs to NB tables for F15h M60h
2014-10-20 14:18:45 +02:00
apb_timer.c
x86, intel-mid: Create IRQs for APB timers and RTC timers
2014-10-29 08:52:23 +01:00
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/asm: Fix typo in arch/x86/kernel/asm_offset_64.c
2014-10-28 11:24:17 +01:00
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: Use PTR_ERR_OR_ZERO
2014-10-17 13:40:51 -07:00
crash_dump_32.c
…
crash_dump_64.c
…
crash.c
kexec: check if crashk_res_low exists when exclude it from crash mem ranges
2014-10-14 02:18:21 +02:00
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_64, traps: Stop using IST for #SS
2014-11-23 13:56:19 -08:00
dumpstack.c
kprobes, x86: Use NOKPROBE_SYMBOL() instead of __kprobes annotation
2014-04-24 10:26:38 +02:00
e820.c
x86/mm, hibernate: Do not assume the first e820 area to be RAM
2014-09-16 09:54:31 +02:00
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: Avoid building unused IRQ entry stubs
2014-12-16 14:08:14 +01:00
entry_64.S
x86: Avoid building unused IRQ entry stubs
2014-12-16 14:08:14 +01:00
espfix_64.c
x86, espfix: Remove stale ptemask
2014-11-11 17:57:46 +01:00
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
x86: Replace __get_cpu_var uses
2014-08-26 13:45:49 -04:00
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: Fix XT-PIC-XT-PIC in /proc/interrupts
2014-10-28 12:01:08 +01:00
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
x86/platform/intel/iosf: Add debugfs config option for IOSF
2014-09-19 13:08:43 +02:00
irq_32.c
x86, threadinfo: Redo "x86: Use inline assembler to get sp"
2014-03-10 17:32:01 -07:00
irq_64.c
x86: Replace __get_cpu_var uses
2014-08-26 13:45:49 -04:00
irq_work.c
x86: Tell irq work about self IPI support
2014-09-13 18:38:29 +02:00
irq.c
x86: Replace seq_printf() with seq_puts()
2014-12-08 11:48:15 +01:00
irqinit.c
x86: Avoid building unused IRQ entry stubs
2014-12-16 14:08:14 +01:00
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
…
kexec-bzimage64.c
kexec-bzimage64: fix sparse warnings
2014-10-14 02:18:21 +02:00
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 'for-3.18-consistent-ops' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
2014-10-15 07:48:18 +02:00
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: Axe the lightly-used cpu_has_pae
2014-09-11 14:30:01 -07:00
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
x86_64,vsyscall: Make vsyscall emulation configurable
2014-11-03 21:44:57 +01:00
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: Use seek definitions instead of hard-coded values
2014-10-17 13:40:55 -07:00
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
…
pmc_atom.c
x86/platform/pmc_atom: Fix warning when CONFIG_DEBUG_FS=n
2014-09-19 13:02:21 +02:00
probe_roms.c
…
process_32.c
x86: copy_thread: Don't nullify ->ptrace_bps twice
2014-09-02 14:51:17 -07:00
process_64.c
x86: copy_thread: Don't nullify ->ptrace_bps twice
2014-09-02 14:51:17 -07:00
process.c
x86, fpu: Shift "fpu_counter = 0" from copy_thread() to arch_dup_task_struct()
2014-09-02 14:51:16 -07:00
ptrace.c
x86, syscall: Fix _TIF_NOHZ handling in syscall_trace_enter_phase1
2014-11-20 23:01:53 +01:00
pvclock.c
hung_task: add method to reset detector
2013-11-06 09:49:02 +02:00
quirks.c
x86: HPET force enable for e6xx based systems
2014-09-15 17:53:35 -07:00
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
x86: Convert a few more per-CPU items to read-mostly ones
2014-11-04 20:13:28 +01:00
setup.c
Merge branch 'x86-vdso-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2014-12-10 14:24:20 -08:00
signal.c
x86, fpu: shift drop_init_fpu() from save_xstate_sig() to handle_signal()
2014-09-02 14:51:14 -07:00
smp.c
asmlinkage, x86: Add explicit __visible to arch/x86/*
2014-05-05 16:07:44 -07:00
smpboot.c
x86, smpboot: Remove pointless preempt_disable() in native_smp_prepare_cpus()
2014-12-16 14:08:14 +01:00
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: Use PTR_ERR_OR_ZERO
2014-10-17 13:40:52 -07:00
sysfb.c
x86/sysfb: Use PTR_ERR_OR_ZERO
2014-10-17 13:40:52 -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_64/vdso: Remove jiffies from the vvar page
2014-10-28 11:22:13 +01:00
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
…
tracepoint.c
x86: Make sure IDT is page aligned
2013-07-16 15:14:48 -07:00
traps.c
Merge branch 'x86-mpx-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2014-12-10 09:34:43 -08:00
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
x86, apic: Handle a bad TSC more gracefully
2014-10-22 21:31:46 +02:00
uprobes.c
x86: Remove arbitrary instruction size limit in instruction decoder
2014-11-18 00:58:52 +01:00
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
x86-64: Use RIP-relative addressing for most per-CPU accesses
2014-11-04 20:43:14 +01:00
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: Restore orig_ax after vsyscall seccomp
2014-11-10 10:46:35 +01:00
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
Revert "PCI: Add x86_msi.msi_mask_irq() and msix_mask_irq()"
2014-11-11 15:14:30 -07:00
x8664_ksyms_64.c
sched, x86: Optimize the preempt_schedule() call
2013-09-25 14:23:07 +02:00
xsave.c
x86, fpu: __restore_xstate_sig()->math_state_restore() needs preempt_disable()
2014-09-02 14:51:15 -07:00