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Peter Zijlstra a8b0ca17b8 perf: Remove the nmi parameter from the swevent and overflow interface 
The nmi parameter indicated if we could do wakeups from the current
context, if not, we would set some state and self-IPI and let the
resulting interrupt do the wakeup.

For the various event classes:

  - hardware: nmi=0; PMI is in fact an NMI or we run irq_work_run from
    the PMI-tail (ARM etc.)
  - tracepoint: nmi=0; since tracepoint could be from NMI context.
  - software: nmi=[0,1]; some, like the schedule thing cannot
    perform wakeups, and hence need 0.

As one can see, there is very little nmi=1 usage, and the down-side of
not using it is that on some platforms some software events can have a
jiffy delay in wakeup (when arch_irq_work_raise isn't implemented).

The up-side however is that we can remove the nmi parameter and save a
bunch of conditionals in fast paths.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Michael Cree <mcree@orcon.net.nz>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Deng-Cheng Zhu <dengcheng.zhu@gmail.com>
Cc: Anton Blanchard <anton@samba.org>
Cc: Eric B Munson <emunson@mgebm.net>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: David S. Miller <davem@davemloft.net>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jason Wessel <jason.wessel@windriver.com>
Cc: Don Zickus <dzickus@redhat.com>
Link: http://lkml.kernel.org/n/tip-agjev8eu666tvknpb3iaj0fg@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
 		2011-07-01 11:06:35 +02:00
..
vdso32 Fix common misspellings 2011-03-31 11:26:23 -03:00
vdso64 Fix common misspellings 2011-03-31 11:26:23 -03:00
.gitignore
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Makefile powerpc/ftrace: Implement raw syscall tracepoints on PowerPC 2011-05-26 13:38:57 +10:00
align.c powerpc: Remove fpscr use from [kvm_]cvt_{fd,df} 2010-09-02 14:07:32 +10:00
asm-offsets.c Merge branch 'kvm-updates/2.6.40' of git://git.kernel.org/pub/scm/virt/kvm/kvm 2011-05-23 08:42:08 -07:00
audit.c
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btext.c Fix common misspellings 2011-03-31 11:26:23 -03:00
cacheinfo.c
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cacheinfo.h
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clock.c
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compat_audit.c
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cpu_setup_6xx.S powerpc: Fix some 6xx/7xxx CPU setup functions 2011-02-07 12:57:11 +11:00
cpu_setup_44x.S powerpc/44x: Add support for the AMCC APM821xx SoC 2010-10-13 08:47:09 -04:00
cpu_setup_a2.S powerpc: Add A2 cpu support 2011-04-27 13:02:02 +10:00
cpu_setup_fsl_booke.S powerpc/e5500: set non-base IVORs 2011-05-19 00:36:43 -05:00
cpu_setup_pa6t.S
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cpu_setup_power7.S powerpc: Initialize TLB and LPID register on HV mode Power7 2011-04-20 11:03:24 +10:00
cpu_setup_ppc970.S
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cputable.c powerpc/book3e: Fix CPU feature handling on e5500 in 32-bit mode 2011-06-02 15:29:09 -05:00
crash.c powerpc/kdump64: Don't reference freed memory as pacas 2011-05-19 14:30:44 +10:00
crash_dump.c crash_dump: export is_kdump_kernel to modules, consolidate elfcorehdr_addr, setup_elfcorehdr and saved_max_pfn 2011-03-23 19:47:19 -07:00
dbell.c powerpc: Consolidate ipi message mux and demux 2011-05-19 15:31:03 +10:00
dma-iommu.c powerpc/iommu: Use coherent_dma_mask for alloc_coherent 2010-12-09 15:17:50 +11:00
dma-swiotlb.c
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dma.c powerpc: Implement dma_mmap_coherent() 2011-03-30 10:44:00 +11:00
e500-pmu.c perf, arch: Cleanup perf-pmu init vs lockup-detector 2010-11-26 15:14:56 +01:00
entry_32.S powerpc/ppc32/tracing: Add stack frame to calls of trace_hardirqs_on/off 2011-01-21 14:08:33 +11:00
entry_64.S powerpc: Free up some CPU feature bits by moving out MMU-related features 2011-04-27 14:18:52 +10:00
exceptions-64e.S powerpc/e5500: set non-base IVORs 2011-05-19 00:36:43 -05:00
exceptions-64s.S powerpc: Improve scheduling of system call entry instructions 2011-05-19 14:30:42 +10:00
firmware.c
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fpu.S powerpc: Remove second definition of STACK_FRAME_OVERHEAD 2010-11-29 15:48:23 +11:00
fsl_booke_entry_mapping.S
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ftrace.c powerpc/ftrace: Implement raw syscall tracepoints on PowerPC 2011-05-26 13:38:57 +10:00
head_8xx.S powerpc: Remove second definition of STACK_FRAME_OVERHEAD 2010-11-29 15:48:23 +11:00
head_32.S powerpc: Remove last piece of GEMINI 2011-05-19 17:32:29 +10:00
head_40x.S Fix common misspellings 2011-03-31 11:26:23 -03:00
head_44x.S Fix common misspellings 2011-03-31 11:26:23 -03:00
head_64.S powerpc: Don't search for paca in freed memory 2011-05-19 14:30:43 +10:00
head_booke.h
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head_fsl_booke.S Fix common misspellings 2011-03-31 11:26:23 -03:00
hw_breakpoint.c
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ibmebus.c PM / Hibernate: Introduce CONFIG_HIBERNATE_CALLBACKS 2011-04-11 22:54:42 +02:00
idle.c powerpc: Re-enable preemption before cpu_die() 2010-08-24 15:26:29 +10:00
idle_6xx.S
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idle_book3e.S
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idle_e500.S
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idle_power4.S powerpc/pmac/smp: Properly NAP offlined CPU on G5 2011-04-01 15:37:25 +11:00
idle_power7.S powerpc: Add NAP mode support on Power7 in HV mode 2011-04-20 11:03:24 +10:00
init_task.c
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io-workarounds.c powerpc/pci: Properly initialize IO workaround "private" 2011-04-27 14:18:33 +10:00
io.c
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iomap.c
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iommu.c powerpc: iommu: Add device name to iommu error printks 2010-12-09 15:35:32 +11:00
irq.c powerpc: Fix irq_free_virt by adjusting bounds before loop 2011-05-26 13:38:59 +10:00
isa-bridge.c
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kgdb.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2011-05-23 09:12:26 -07:00
kprobes.c
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kvm.c PPC: KVM: Book E doesn't have __end_interrupts. 2010-11-05 14:42:27 -02:00
kvm_emul.S KVM: PPC: Make PV mtmsrd L=1 work with r30 and r31 2010-10-24 10:52:14 +02:00
l2cr_6xx.S Fix common misspellings 2011-03-31 11:26:23 -03:00
legacy_serial.c powerpc: Check device status before adding serial device 2011-04-12 06:29:21 -05:00
lparcfg.c powerpc/pseries: Add page coalescing support 2011-05-04 16:02:21 +10:00
machine_kexec.c powerpc: Convert to new irq_* function names 2011-03-29 14:48:12 +02:00
machine_kexec_32.c powerpc/kexec: make masking/disabling interrupts generic 2010-10-14 00:52:46 -05:00
machine_kexec_64.c
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misc.S powerpc: Remove unneeded cpu_setup/restore from POWER7 cputable entry 2010-11-29 15:48:22 +11:00
misc_32.S powerpc: Fix 32-bit SMP build 2011-05-20 16:23:19 -07:00
misc_64.S powerpc/kexec: Fix memory corruption from unallocated slaves 2011-05-19 14:30:43 +10:00
module.c powerpc: remove unused variable 2010-10-05 17:27:54 -07:00
module_32.c
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module_64.c
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mpc7450-pmu.c perf, arch: Cleanup perf-pmu init vs lockup-detector 2010-11-26 15:14:56 +01:00
msi.c
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nvram_64.c powerpc/nvram: Generalize code for OS partitions in NVRAM 2011-03-04 18:19:04 +11:00
of_platform.c dt/powerpc: Eliminate users of of_platform_{,un}register_driver 2011-02-28 01:36:39 -07:00
paca.c powerpc: Use nr_cpu_ids in initial paca allocation 2011-05-19 14:30:44 +10:00
pci-common.c powerpc: Convert to new irq_* function names 2011-03-29 14:48:12 +02:00
pci_32.c powerpc/pci: Make both ppc32 and ppc64 use sysdata for pci_controller 2011-02-04 11:46:51 -07:00
pci_64.c powerpc/pci: Make both ppc32 and ppc64 use sysdata for pci_controller 2011-02-04 11:46:51 -07:00
pci_dn.c powerpc: Remove alloc_maybe_bootmem for zalloc version 2011-05-19 15:30:57 +10:00
pci_of_scan.c powerpc/pci: Make both ppc32 and ppc64 use sysdata for pci_controller 2011-02-04 11:46:51 -07:00
perf_callchain.c perf: Factorize callchain context handling 2010-08-19 01:32:11 +02:00
perf_event.c perf: Remove the nmi parameter from the swevent and overflow interface 2011-07-01 11:06:35 +02:00
perf_event_fsl_emb.c perf: Remove the nmi parameter from the swevent and overflow interface 2011-07-01 11:06:35 +02:00
pmc.c
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power4-pmu.c perf, arch: Cleanup perf-pmu init vs lockup-detector 2010-11-26 15:14:56 +01:00
power5+-pmu.c perf, arch: Cleanup perf-pmu init vs lockup-detector 2010-11-26 15:14:56 +01:00
power5-pmu.c perf, arch: Cleanup perf-pmu init vs lockup-detector 2010-11-26 15:14:56 +01:00
power6-pmu.c perf, arch: Cleanup perf-pmu init vs lockup-detector 2010-11-26 15:14:56 +01:00
power7-pmu.c perf, arch: Cleanup perf-pmu init vs lockup-detector 2010-11-26 15:14:56 +01:00
ppc32.h
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ppc970-pmu.c perf, arch: Cleanup perf-pmu init vs lockup-detector 2010-11-26 15:14:56 +01:00
ppc_ksyms.c powerpc: Simplify 4k/64k copy_page logic 2011-05-19 14:30:42 +10:00
ppc_save_regs.S Fix common misspellings 2011-03-31 11:26:23 -03:00
proc_powerpc.c
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process.c powerpc: mmu_gather rework 2011-05-25 08:39:13 -07:00
prom.c powerpc: Force page alignment for initrd reserved memory 2011-06-09 16:52:38 +10:00
prom_init.c powerpc/pseries: Add page coalescing support 2011-05-04 16:02:21 +10:00
prom_init_check.sh
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prom_parse.c of/pci: move of_irq_map_pci() into generic code 2011-02-04 11:46:50 -07:00
ptrace.c perf: Remove the nmi parameter from the swevent and overflow interface 2011-07-01 11:06:35 +02:00
ptrace32.c powerpc: Update compat_arch_ptrace 2010-12-09 15:35:32 +11:00
reloc_64.S
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rtas-proc.c
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rtas-rtc.c
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rtas.c powerpc/pseries: Add page coalescing support 2011-05-04 16:02:21 +10:00
rtas_flash.c powerpc/rtas_flash: Use simple_read_from_buffer 2011-01-21 14:08:34 +11:00
rtas_pci.c
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rtasd.c Fix common misspellings 2011-03-31 11:26:23 -03:00
setup-common.c powerpc: Fix for Pegasos keyboard and mouse 2011-05-19 17:32:27 +10:00
setup.h
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setup_32.c powerpc: Properly handshake CPUs going out of boot spin loop 2011-04-20 11:03:24 +10:00
setup_64.c powerpc/fsl-booke64: Add support for Debug Level exception handler 2011-05-19 00:36:42 -05:00
signal.c powerpc: fix double syscall restarts 2010-09-22 09:33:50 -07:00
signal.h
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signal_32.c powerpc: fix double syscall restarts 2010-09-22 09:33:50 -07:00
signal_64.c powerpc: Use MSR_64BIT in places 2011-04-27 14:18:44 +10:00
smp-tbsync.c
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smp.c powerpc/cell: Use common smp ipi actions 2011-05-26 13:38:58 +10:00
softemu8xx.c
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stacktrace.c
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suspend.c
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swsusp.c PM / Hibernate: Remove arch_prepare_suspend() 2011-05-24 23:35:55 +02:00
swsusp_32.S Fix common misspellings 2011-03-31 11:26:23 -03:00
swsusp_64.c
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swsusp_asm64.S
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swsusp_booke.S
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sys_ppc32.c BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
syscalls.c
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sysfs.c powerpc: Per process DSCR + some fixes (try#4) 2011-04-27 14:18:19 +10:00
systbl.S
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systbl_chk.c
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systbl_chk.sh
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tau_6xx.c
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time.c irq_work, ppc: Fix up arch hooks 2011-07-01 11:02:22 +02:00
traps.c powerpc/fsl_rio: move machine_check handler 2011-05-20 08:46:57 -05:00
udbg.c powerpc: Add early debug for WSP platforms 2011-05-06 13:32:41 +10:00
udbg_16550.c powerpc: Add early debug for WSP platforms 2011-05-06 13:32:41 +10:00
vdso.c mm: arch: rename in_gate_area_no_task to in_gate_area_no_mm 2011-03-23 16:36:55 -04:00
vecemu.c
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vector.S powerpc: Remove static branch hint in giveup_altivec 2011-05-19 14:30:42 +10:00
vio.c powerpc/iommu: Use coherent_dma_mask for alloc_coherent 2010-12-09 15:17:50 +11:00
vmlinux.lds.S percpu: Always align percpu output section to PAGE_SIZE 2011-03-24 18:50:09 +01:00