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twx-linux/arch/powerpc/kernel
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Joel Stanley b035bb9573 powerpc: Warn about use of smt_snooze_delay 
commit a02f6d4235 upstream.

It's not done anything for a long time. Save the percpu variable, and
emit a warning to remind users to not expect it to do anything.

This uses pr_warn_once instead of pr_warn_ratelimit as testing
'ppc64_cpu --smt=off' on a 24 core / 4 SMT system showed the warning
to be noisy, as the online/offline loop is slow.

Fixes: 3fa8cad82b ("powerpc/pseries/cpuidle: smt-snooze-delay cleanup.")
Cc: stable@vger.kernel.org # v3.14
Signed-off-by: Joel Stanley <joel@jms.id.au>
Acked-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200902000012.3440389-1-joel@jms.id.au
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-05 11:08:51 +01:00
..
trace
powerpc: consolidate -mno-sched-epilog into FTRACE flags
2019-01-13 09:51:05 +01:00
vdso32
powerpc: Fix vDSO clock_getres()
2019-12-17 20:35:40 +01:00
vdso64
powerpc: Fix vDSO clock_getres()
2019-12-17 20:35:40 +01:00
.gitignore
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align.c
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asm-offsets.c
powerpc: Fix vDSO clock_getres()
2019-12-17 20:35:40 +01:00
audit.c
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btext.c
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cacheinfo.c
powerpc/cacheinfo: add cacheinfo_teardown, cacheinfo_rebuild
2020-01-27 14:50:55 +01:00
cacheinfo.h
powerpc/cacheinfo: add cacheinfo_teardown, cacheinfo_rebuild
2020-01-27 14:50:55 +01:00
compat_audit.c
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cpu_setup_6xx.S
…
cpu_setup_44x.S
…
cpu_setup_fsl_booke.S
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cpu_setup_pa6t.S
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cpu_setup_power.S
powerpc/64s: Don't init FSCR_DSCR in __init_FSCR()
2020-09-03 11:24:16 +02:00
cpu_setup_ppc970.S
…
cputable.c
powerpc: fix hardware PMU exception bug on PowerVM compatibility mode systems
2020-03-11 14:15:12 +01:00
crash_dump.c
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crash.c
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dbell.c
KVM: PPC: Book3S HV: use smp_mb() when setting/clearing host_ipi flag
2020-01-09 10:19:08 +01:00
dma-iommu.c
powerpc/dma: Fix dma_map_ops::get_required_mask
2020-09-23 12:11:02 +02:00
dma-swiotlb.c
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dma.c
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dt_cpu_ftrs.c
powerpc/64s: Don't let DT CPU features set FSCR_DSCR
2020-06-22 09:05:29 +02:00
eeh_cache.c
…
eeh_dev.c
…
eeh_driver.c
powerpc/powernv/iov: Ensure the pdn for VFs always contains a valid PE number
2020-02-24 08:34:36 +01:00
eeh_event.c
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eeh_pe.c
powerpc/eeh: Fix use of EEH_PE_KEEP on wrong field
2019-12-01 09:16:18 +01:00
eeh_sysfs.c
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eeh.c
powerpc/eeh: Only dump stack once if an MMIO loop is detected
2020-10-01 13:14:31 +02:00
entry_32.S
powerpc/32: Clear on-stack exception marker upon exception return
2019-03-23 20:10:07 +01:00
entry_64.S
powerpc/book3s64: Fix link stack flush on context switch
2019-12-01 09:17:46 +01:00
epapr_hcalls.S
…
epapr_paravirt.c
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exceptions-64e.S
powerpc/fsl: Fix the flush of branch predictor.
2019-04-03 06:26:20 +02:00
exceptions-64s.S
powerpc: Fix HMIs on big-endian with CONFIG_RELOCATABLE=y
2019-12-05 09:20:48 +01:00
fadump.c
powerpc/fadump: Do not allow hot-remove memory from fadump reserved area.
2019-02-12 19:47:16 +01:00
firmware.c
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fpu.S
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fsl_booke_entry_mapping.S
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head_8xx.S
powerpc/8xx: fix setting of pagetable for Abatron BDI debug tool.
2019-02-27 10:08:54 +01:00
head_32.S
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head_40x.S
…
head_44x.S
…
head_64.S
powerpc/64: Don't initialise init_task->thread.regs
2020-06-25 15:32:56 +02:00
head_booke.h
powerpc/fsl: Fixed warning: orphan section `__btb_flush_fixup'
2019-04-03 06:26:20 +02:00
head_fsl_booke.S
powerpc/fsl: Flush the branch predictor at each kernel entry (32 bit)
2019-04-03 06:26:20 +02:00
hw_breakpoint.c
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idle_6xx.S
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idle_book3e.S
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idle_book3s.S
powerpc/powernv/idle: Restore AMR/UAMOR/AMOR after idle
2020-04-17 10:48:53 +02:00
idle_e500.S
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idle_power4.S
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idle.c
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ima_kexec.c
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io-workarounds.c
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io.c
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iomap.c
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iommu.c
powerpc/iommu: Avoid derefence before pointer check
2019-11-20 18:46:58 +01:00
irq.c
powerpc/irq: fix stack overflow verification
2019-12-31 16:36:32 +01:00
isa-bridge.c
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jump_label.c
jump_label: move 'asm goto' support test to Kconfig
2019-06-04 08:02:34 +02:00
kexec_elf_64.c
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kgdb.c
powerpc/kgdb: add kgdb_arch_set/remove_breakpoint()
2020-01-27 14:50:00 +01:00
kprobes-ftrace.c
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kprobes.c
powerpc/kprobes: Ignore traps that happened in real mode
2020-04-17 10:48:53 +02:00
kvm_emul.S
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kvm.c
kmemleak: powerpc: skip scanning holes in the .bss section
2019-05-08 07:21:50 +02:00
l2cr_6xx.S
…
legacy_serial.c
…
machine_kexec_32.c
…
machine_kexec_64.c
…
machine_kexec_file_64.c
…
machine_kexec.c
powerpc/crashkernel: Take "mem=" option into account
2020-06-25 15:32:51 +02:00
Makefile
powerpc: Make setjmp/longjmp signature standard
2020-04-17 10:48:54 +02:00
mce_power.c
powerpc/mm/mce: Keep irqs disabled during lockless page table walk
2020-01-27 14:51:14 +01:00
mce.c
powerpc/mce: Schedule work from irq_work
2019-10-11 18:20:49 +02:00
misc_32.S
…
misc_64.S
powerpc: Allow flush_icache_range to work across ranges >4GB
2019-12-17 20:35:16 +01:00
misc.S
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module_32.c
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module_64.c
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module.c
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module.lds
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msi.c
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nvram_64.c
pstore: Convert buf_lock to semaphore
2019-06-11 12:20:52 +02:00
of_platform.c
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optprobes_head.S
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optprobes.c
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paca.c
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pci_32.c
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pci_64.c
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pci_dn.c
powerpc/sriov: Remove VF eeh_dev state when disabling SR-IOV
2020-02-24 08:34:50 +01:00
pci_of_scan.c
powerpc/pci/of: Parse unassigned resources
2020-05-10 10:30:06 +02:00
pci-common.c
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pci-hotplug.c
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pmc.c
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ppc32.h
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ppc_save_regs.S
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proc_powerpc.c
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process.c
powerpc/process: Fix flush_all_to_thread for SPE
2019-12-01 09:17:01 +01:00
prom_init_check.sh
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prom_init.c
powerpc/pseries: Enable support for ibm,drc-info property
2020-01-27 14:49:52 +01:00
prom_parse.c
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prom.c
powerpc/64s: Save FSCR to init_task.thread.fscr after feature init
2020-06-22 09:05:29 +02:00
ptrace32.c
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ptrace.c
powerpc/ptrace: Simplify vr_get/set() to avoid GCC warning
2019-03-23 20:10:07 +01:00
reloc_32.S
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reloc_64.S
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rtas_flash.c
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rtas_pci.c
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rtas-proc.c
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rtas-rtc.c
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rtas.c
powerpc/rtas: Restrict RTAS requests from userspace
2020-11-05 11:08:51 +01:00
rtasd.c
powerpc/pseries: Remove prrn_work workqueue
2019-04-20 09:16:01 +02:00
security.c
powerpc/security: Fix wrong message when RFI Flush is disable
2020-01-04 19:12:56 +01:00
setup_32.c
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setup_64.c
powerpc/setup_64: Set cache-line-size based on cache-block-size
2020-04-29 16:31:32 +02:00
setup-common.c
powerpc/fsl: Enable runtime patching if nospectre_v2 boot arg is used
2019-04-03 06:26:20 +02:00
setup.h
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signal_32.c
powerpc/tm: Fix clearing MSR[TS] in current when reclaiming on signal delivery
2020-02-28 16:38:48 +01:00
signal_64.c
powerpc/64/tm: Don't let userspace set regs->trap via sigreturn
2020-04-17 10:48:53 +02:00
signal.c
powerpc/tm: Fix clearing MSR[TS] in current when reclaiming on signal delivery
2020-02-28 16:38:48 +01:00
signal.h
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smp-tbsync.c
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smp.c
powerpc/smp: Fix NMI IPI xmon timeout
2019-05-16 19:41:26 +02:00
stacktrace.c
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suspend.c
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swsusp_32.S
powerpc/32s: fix suspend/resume when IBATs 4-7 are used
2019-07-26 09:14:29 +02:00
swsusp_64.c
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swsusp_asm64.S
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swsusp_booke.S
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swsusp.c
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sys_ppc32.c
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syscalls.c
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sysfs.c
powerpc: Warn about use of smt_snooze_delay
2020-11-05 11:08:51 +01:00
systbl_chk.c
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systbl_chk.sh
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systbl.S
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tau_6xx.c
powerpc/tau: Disable TAU between measurements
2020-10-30 10:38:19 +01:00
time.c
Revert "powerpc/64: irq_work avoid interrupt when called with hardware irqs enabled"
2020-04-29 16:31:14 +02:00
tm.S
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traps.c
powerpc/traps: Make unrecoverable NMIs die instead of panic
2020-10-01 13:14:44 +02:00
udbg_16550.c
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udbg.c
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uprobes.c
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vdso.c
powerpc/vdso: Fix vdso cpu truncation
2020-08-19 08:14:57 +02:00
vecemu.c
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vector.S
…
vmlinux.lds.S
powerpc: Include .BTF section
2020-03-25 08:06:05 +01:00
watchdog.c
powerpc/watchdog: Use hrtimers for per-CPU heartbeat
2019-05-31 06:46:12 -07:00