Nicholas Piggin 6029755eed powerpc: Fix deadlock with multiple calls to smp_send_stop ... smp_send_stop can lock up the IPI path for any subsequent calls, because the receiving CPUs spin in their handler function. This started becoming a problem with the addition of an smp_send_stop call in the reboot path, because panics can reboot after doing their own smp_send_stop. The NMI IPI variant was fixed with ac61c11566 ("powerpc: Fix smp_send_stop NMI IPI handling"), which leaves the smp_call_function variant. This is fixed by having smp_send_stop only ever do the smp_call_function once. This is a bit less robust than the NMI IPI fix, because any other call to smp_call_function after smp_send_stop could deadlock, but that has always been the case, and it was not been a problem before. Fixes: f2748bdfe1 ("powerpc/powernv: Always stop secondaries before reboot/shutdown") Reported-by: Abdul Haleem <abdhalee@linux.vnet.ibm.com> Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>		2018-04-27 16:35:57 +10:00
..
trace
vdso32
vdso64	powerpc/vdso64: Add support for CLOCK_{REALTIME/MONOTONIC}_COARSE	2017-12-04 15:01:09 +11:00
.gitignore
align.c
asm-offsets.c	Merge branch 'topic/paca' into next	2018-03-31 09:09:36 +11:00
audit.c
btext.c
cacheinfo.c
cacheinfo.h
compat_audit.c
cpu_setup_6xx.S	powerpc: Free up CPU feature bits on 64-bit machines	2018-03-24 00:38:51 +11:00
cpu_setup_44x.S
cpu_setup_fsl_booke.S	powerpc: Free up CPU feature bits on 64-bit machines	2018-03-24 00:38:51 +11:00
cpu_setup_pa6t.S
cpu_setup_power.S	Merge branch 'fixes' into next	2018-01-21 23:21:14 +11:00
cpu_setup_ppc970.S
cputable.c	powerpc/64s: Remove POWER4 support	2018-04-01 00:47:50 +11:00
crash_dump.c
crash.c	powerpc/64: Use array of paca pointers and allocate pacas individually	2018-03-30 23:34:23 +11:00
dbell.c
dma-iommu.c	powerpc: rename dma_direct_ to dma_nommu_	2018-01-10 16:41:14 +01:00
dma-swiotlb.c	swiotlb: rename swiotlb_free to swiotlb_exit	2018-01-15 09:35:39 +01:00
dma.c	powerpc: rename swiotlb_dma_ops	2018-01-15 09:35:26 +01:00
dt_cpu_ftrs.c	powerpc/64s: Fix CPU_FTRS_ALWAYS vs DT CPU features	2018-04-13 23:51:44 +10:00
eeh_cache.c	powerpc/eeh: Fix misleading comment in __eeh_addr_cache_get_device()	2018-03-27 23:44:58 +11:00
eeh_dev.c
eeh_driver.c	powerpc/eeh: Fix race with driver un/bind	2018-04-01 00:47:45 +11:00
eeh_event.c	powerpc/eeh: Manage EEH_PE_RECOVERING inside eeh_handle_normal_event()	2018-03-27 23:44:58 +11:00
eeh_pe.c	powerpc/eeh: Fix enabling bridge MMIO windows	2018-04-19 13:02:38 +10:00
eeh_sysfs.c	powerpc/eeh: Add EEH notify resume sysfs	2018-01-27 20:02:52 +11:00
eeh.c	powerpc/eeh: Add eeh_state_active() helper	2018-03-27 23:45:19 +11:00
entry_32.S	powerpc/8xx: Only perform perf counting when perf is in use.	2018-01-16 23:47:12 +11:00
entry_64.S	powerpc/64s: Set assembler machine type to POWER4	2018-04-01 00:47:49 +11:00
epapr_hcalls.S
epapr_paravirt.c
exceptions-64e.S	powerpc/64s: Fix may_hard_irq_enable() for PMI soft masking	2018-02-08 23:56:10 +11:00
exceptions-64s.S	powerpc/64s: Set assembler machine type to POWER4	2018-04-01 00:47:49 +11:00
fadump.c	Revert "powerpc: Do not call ppc_md.panic in fadump panic notifier"	2017-12-05 23:21:46 +11:00
firmware.c
fpu.S
fsl_booke_entry_mapping.S
head_8xx.S	powerpc/8xx: Use L1 entry APG to handle _PAGE_ACCESSED for CONFIG_SWAP	2018-01-16 23:47:15 +11:00
head_32.S
head_40x.S
head_44x.S
head_64.S	powerpc/64: Use array of paca pointers and allocate pacas individually	2018-03-30 23:34:23 +11:00
head_booke.h
head_fsl_booke.S
hw_breakpoint.c	powerpc: Update ptrace to use ppc_breakpoint_available()	2018-03-27 23:52:44 +11:00
idle_6xx.S
idle_book3e.S	powerpc/64: Rename soft_enabled to irq_soft_mask	2018-01-19 22:37:01 +11:00
idle_book3s.S	powerpc/kvm: Fix lockups when running KVM guests on Power8	2018-04-19 16:22:20 +10:00
idle_e500.S
idle_power4.S	powerpc/64: Rename soft_enabled to irq_soft_mask	2018-01-19 22:37:01 +11:00
idle.c
ima_kexec.c
io-workarounds.c
io.c
iomap.c	powerpc: iomap.c: introduce io{read|write}64_{lo_hi|hi_lo}	2018-04-05 14:59:26 +10:00
iommu.c
irq.c	powerpc/64s: Fix lost pending interrupt due to race causing lost update to irq_happened	2018-03-23 08:41:40 +11:00
isa-bridge.c
jump_label.c
kexec_elf_64.c	kernel/kexec_file.c: allow archs to set purgatory load address	2018-04-13 17:10:28 -07:00
kgdb.c
kprobes-ftrace.c
kprobes.c	powerpc/kprobes: Fix call trace due to incorrect preempt count	2018-03-31 00:10:33 +11:00
kvm_emul.S
kvm.c
l2cr_6xx.S
legacy_serial.c
machine_kexec_32.c
machine_kexec_64.c	powerpc/64s: Allocate LPPACAs individually	2018-03-30 23:34:24 +11:00
machine_kexec_file_64.c	kexec_file,x86,powerpc: factor out kexec_file_ops functions	2018-04-13 17:10:27 -07:00
machine_kexec.c
Makefile	powerpc updates for 4.17	2018-04-07 12:08:19 -07:00
mce_power.c	powerpc/mce: Fix a bug where mce loops on memory UE.	2018-04-24 13:54:51 +10:00
mce.c	powerpc updates for 4.16	2018-02-02 10:01:04 -08:00
misc_32.S
misc_64.S	powerpc: Remove unused flush_dcache_phys_range()	2018-03-20 16:47:53 +11:00
misc.S
module_32.c
module_64.c	powerpc updates for 4.16	2018-02-02 10:01:04 -08:00
module.c
module.lds	powerpc/modules: Fix alignment of .toc section in kernel modules	2017-12-11 13:03:35 +11:00
msi.c
nvram_64.c	powerpc: Use sizeof(*foo) rather than sizeof(struct foo)	2018-03-20 16:47:53 +11:00
of_platform.c
optprobes_head.S	powerpc/64: Rename soft_enabled to irq_soft_mask	2018-01-19 22:37:01 +11:00
optprobes.c
paca.c	Merge branch 'topic/paca' into next	2018-03-31 09:09:36 +11:00
pci_32.c	powerpc/PCI: Deprecate pci_get_bus_and_slot()	2018-01-11 17:21:55 -06:00
pci_64.c
pci_dn.c	powerpc/pci: Separate SR-IOV Calls	2017-12-11 13:03:35 +11:00
pci_of_scan.c	pci-v4.16-changes	2018-02-06 09:59:40 -08:00
pci-common.c	powerpc/pci: Use generic pci_mmap_resource_range()	2018-02-28 16:18:53 -06:00
pci-hotplug.c	powerpc/pci: Unroll two pass loop when scanning bridges	2017-12-18 23:05:52 -06:00
pmc.c
ppc32.h
ppc_save_regs.S
proc_powerpc.c	powerpc: Use octal numbers for file permissions	2018-01-22 05:48:33 +11:00
process.c	powerpc: Don't write to DABR on >= Power8 if DAWR is disabled	2018-04-03 21:50:08 +10:00
prom_init_check.sh	powerpc/mm/radix: Update command line parsing for disable_radix	2018-04-04 16:59:50 +10:00
prom_init.c	powerpc/mm/radix: Update command line parsing for disable_radix	2018-04-04 16:59:50 +10:00
prom_parse.c
prom.c	Merge branch 'topic/paca' into next	2018-03-31 09:09:36 +11:00
ptrace32.c
ptrace.c	powerpc: Update ptrace to use ppc_breakpoint_available()	2018-03-27 23:52:44 +11:00
reloc_32.S
reloc_64.S
rtas_flash.c	powerpc: Use octal numbers for file permissions	2018-01-22 05:48:33 +11:00
rtas_pci.c
rtas-proc.c	powerpc: Use octal numbers for file permissions	2018-01-22 05:48:33 +11:00
rtas-rtc.c
rtas.c
rtasd.c	vfs: do bulk POLL* -> EPOLL* replacement	2018-02-11 14:34:03 -08:00
security.c	powerpc: Move default security feature flags	2018-04-03 21:50:08 +10:00
setup_32.c	powerpc/32: Add missing prototypes for (early|machine)_init()	2018-03-13 15:50:42 +11:00
setup_64.c	powerpc/64s: Default l1d_size to 64K in RFI fallback flush	2018-04-17 19:29:04 +10:00
setup-common.c	powerpc/64e: Fix oops due to deferral of paca allocation	2018-04-01 00:47:38 +11:00
setup.h	powerpc/64: move default SPR recording	2018-03-30 23:34:26 +11:00
signal_32.c	powerpc/32: Mark both tmp variables as unused	2018-03-13 15:50:33 +11:00
signal_64.c	powerpc/tm: Fix endianness flip on trap	2018-01-22 05:48:36 +11:00
signal.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/livepatching	2018-01-31 13:02:18 -08:00
signal.h	powerpc: Add missing prototypes for sys_sigreturn() & sys_rt_sigreturn()	2018-03-13 15:50:39 +11:00
smp-tbsync.c
smp.c	powerpc: Fix deadlock with multiple calls to smp_send_stop	2018-04-27 16:35:57 +10:00
stacktrace.c
suspend.c
swsusp_32.S
swsusp_64.c
swsusp_asm64.S
swsusp_booke.S
swsusp.c
sys_ppc32.c	mm: add ksys_readahead() helper; remove in-kernel calls to sys_readahead()	2018-04-02 20:16:12 +02:00
syscalls.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next	2018-04-03 14:08:58 -07:00
sysfs.c	Merge branch 'topic/paca' into next	2018-03-31 09:09:36 +11:00
systbl_chk.c
systbl_chk.sh
systbl.S
tau_6xx.c	treewide: setup_timer() -> timer_setup()	2017-11-21 15:57:07 -08:00
time.c	powerpc: Fix oops due to bad access of lppaca on bare metal	2018-04-03 21:50:07 +10:00
tm.S
traps.c	powerpc/fscr: Enable interrupts earlier before calling get_user()	2018-04-10 11:23:23 +10:00
udbg_16550.c
udbg.c
uprobes.c
vdso.c	powerpc: Use feature bit for RTC presence rather than timebase presence	2018-03-24 00:36:45 +11:00
vecemu.c
vector.S
vmlinux.lds.S	powerpc updates for 4.16	2018-02-02 10:01:04 -08:00
watchdog.c	powerpc/watchdog: Print the NIP in soft_nmi_interrupt()	2018-01-28 17:08:29 +11:00