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768d18ad6d
kernel_optimize_test/arch/powerpc/kernel
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Milton Miller 768d18ad6d powerpc: Don't search for paca in freed memory 
Starting with 1426d5a3bd (powerpc:
Dynamically allocate pacas) we free the memory for pacas beyond
cpu_possible, but we failed to update the loop the secondary cpus use
to find their paca.  If the system has running cpu threads for which
the kernel did not allocate a paca for they will search the memory that
was freed.  For instance this could happen when the device tree for
a kdump kernel was not updated after a cpu hotplug, or the kernel is
running with more cpus than the kernel was configured.

Since c1854e0072 (powerpc: Set nr_cpu_ids
early and use it to free PACAs) we set nr_cpu_ids before telling the
cpus to advance, so use that to limit the search.

We can't reference nr_cpu_ids without CONFIG_SMP because it is defined
as 1 instead of a memory location, but any extra threads should be sent
to kexec_wait in that case anyways, so make that explicit and remove
the search loop for UP.

Note to stable: The fix also requires
c1854e0072 (powerpc: Set
nr_cpu_ids early and use it to free PACAs) to function.  Also
9d07bc841c (Properly handshake CPUs going
out of boot spin loop) affects the second chunk, specifically the branch
target was 3b before and is 4b after that patch, and there was a blank
line before the #ifdef CONFIG_SMP that was removed

Cc: <stable@kernel.org> # .34.x: c1854e0072 powerpc: Set nr_cpu_ids early
Cc: <stable@kernel.org> # .34.x
Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2011-05-19 14:30:43 +10:00
..
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
align.c powerpc: Remove fpscr use from [kvm_]cvt_{fd,df} 2010-09-02 14:07:32 +10:00
asm-offsets.c powerpc: Per process DSCR + some fixes (try#4) 2011-04-27 14:18:19 +10:00
audit.c
btext.c Fix common misspellings 2011-03-31 11:26:23 -03:00
cacheinfo.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
cacheinfo.h
clock.c
compat_audit.c
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 rapidio: modify configuration to support PCI-SRIO controller 2011-03-23 19:46:42 -07:00
cpu_setup_pa6t.S
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
cputable.c powerpc: Free up some CPU feature bits by moving out MMU-related features 2011-04-27 14:18:52 +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
crash.c powerpc/kexec: Fix build failure on 32-bit SMP 2011-05-04 15:22:59 +10:00
dbell.c powerpc/book3e: Resend doorbell exceptions to ourself 2010-07-09 16:11:19 +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 of: Merge of_platform_bus_type with platform_bus_type 2010-07-24 09:57:51 -06:00
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: Add early debug for WSP platforms 2011-05-06 13:32:41 +10:00
exceptions-64s.S powerpc: Improve scheduling of system call entry instructions 2011-05-19 14:30:42 +10:00
firmware.c
fpu.S powerpc: Remove second definition of STACK_FRAME_OVERHEAD 2010-11-29 15:48:23 +11:00
fsl_booke_entry_mapping.S powerpc/fsl-booke: Fix address issue when using relocatable kernels 2010-07-11 11:04:08 -05:00
ftrace.c
head_8xx.S powerpc: Remove second definition of STACK_FRAME_OVERHEAD 2010-11-29 15:48:23 +11:00
head_32.S powerpc/smp: soft-replugged CPUs must go back to start_secondary 2011-04-01 15:37:09 +11:00
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 powerpc/booke: Add Stack Marking support to Booke Exception Prolog 2010-05-05 08:01:52 -04:00
head_fsl_booke.S Fix common misspellings 2011-03-31 11:26:23 -03:00
hw_breakpoint.c powerpc, hw_breakpoint: Tell generic code we have no instruction breakpoints 2010-06-30 13:54:58 +10:00
ibmebus.c PM / Hibernate: Introduce CONFIG_HIBERNATE_CALLBACKS 2011-04-11 22:54:42 +02:00
idle_6xx.S
idle_book3e.S powerpc/book3e: Add generic 64-bit idle powersave support 2010-07-14 14:13:18 +10:00
idle_e500.S
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
idle.c powerpc: Re-enable preemption before cpu_die() 2010-08-24 15:26:29 +10:00
init_task.c
io-workarounds.c powerpc/pci: Properly initialize IO workaround "private" 2011-04-27 14:18:33 +10:00
io.c
iomap.c
iommu.c powerpc: iommu: Add device name to iommu error printks 2010-12-09 15:35:32 +11:00
irq.c powerpc/irq: Stop exporting irq_map 2011-05-04 15:02:15 +10:00
isa-bridge.c
kgdb.c kgdb,ppc: Fix regression in evr register handling 2010-11-17 13:54:58 -06:00
kprobes.c powerpc/kprobes: Remove resume_execution() in kprobes 2010-06-02 17:50:37 +10:00
kvm_emul.S KVM: PPC: Make PV mtmsrd L=1 work with r30 and r31 2010-10-24 10:52:14 +02:00
kvm.c PPC: KVM: Book E doesn't have __end_interrupts. 2010-11-05 14:42:27 -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_32.c powerpc/kexec: make masking/disabling interrupts generic 2010-10-14 00:52:46 -05:00
machine_kexec_64.c powerpc/kexec: Fix orphaned offline CPUs across kexec 2010-07-31 15:05:22 +10:00
machine_kexec.c powerpc: Convert to new irq_* function names 2011-03-29 14:48:12 +02:00
Makefile powerpc: Remove unused config in the Makefile 2011-05-19 14:30:40 +10:00
misc_32.S powerpc: Remove second definition of STACK_FRAME_OVERHEAD 2010-11-29 15:48:23 +11:00
misc_64.S powerpc/kexec: Fix memory corruption from unallocated slaves 2011-05-19 14:30:43 +10:00
misc.S powerpc: Remove unneeded cpu_setup/restore from POWER7 cputable entry 2010-11-29 15:48:22 +11:00
module_32.c
module_64.c
module.c powerpc: remove unused variable 2010-10-05 17:27:54 -07:00
mpc7450-pmu.c perf, arch: Cleanup perf-pmu init vs lockup-detector 2010-11-26 15:14:56 +01:00
msi.c
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: In HV mode, use HSPRG0 for PACA 2011-04-20 11:03:22 +10:00
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/pci: Fix crash in PCI code on ppc64 when matching device nodes 2011-03-21 10:57:57 +11:00
pci_of_scan.c powerpc/pci: Make both ppc32 and ppc64 use sysdata for pci_controller 2011-02-04 11:46:51 -07:00
pci-common.c powerpc: Convert to new irq_* function names 2011-03-29 14:48:12 +02:00
perf_callchain.c perf: Factorize callchain context handling 2010-08-19 01:32:11 +02:00
perf_event_fsl_emb.c powerpc, perf: Fix frequency calculation for overflowing counters (FSL version) 2011-01-19 20:05:42 +01:00
perf_event.c powerpc/perf_event: Skip updating kernel counters if register value shrinks 2011-04-18 13:08:23 +10:00
pmc.c powerpc: Convert pmc_owner_lock to raw_spinlock 2010-02-19 14:52:33 +11:00
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
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 include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
process.c powerpc: Free up some CPU feature bits by moving out MMU-related features 2011-04-27 14:18:52 +10:00
prom_init_check.sh powerpc: Fix compile errors in prom_init_check for gcc 4.5 2010-07-08 18:11:39 +10:00
prom_init.c powerpc/pseries: Add page coalescing support 2011-05-04 16:02:21 +10:00
prom_parse.c of/pci: move of_irq_map_pci() into generic code 2011-02-04 11:46:50 -07:00
prom.c powerpc: Free up some CPU feature bits by moving out MMU-related features 2011-04-27 14:18:52 +10:00
ptrace32.c powerpc: Update compat_arch_ptrace 2010-12-09 15:35:32 +11:00
ptrace.c Fix common misspellings 2011-03-31 11:26:23 -03:00
reloc_64.S
rtas_flash.c powerpc/rtas_flash: Use simple_read_from_buffer 2011-01-21 14:08:34 +11:00
rtas_pci.c
rtas-proc.c
rtas-rtc.c
rtas.c powerpc/pseries: Add page coalescing support 2011-05-04 16:02:21 +10:00
rtasd.c Fix common misspellings 2011-03-31 11:26:23 -03:00
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: Rename slb0_limit() to safe_stack_limit() and add Book3E support 2011-05-06 13:32:24 +10:00
setup-common.c powerpc: Convert old cpumask API into new one 2011-05-04 15:22:59 +10:00
setup.h
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
signal.c powerpc: fix double syscall restarts 2010-09-22 09:33:50 -07:00
signal.h
smp-tbsync.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
smp.c powerpc: Convert old cpumask API into new one 2011-05-04 15:22:59 +10:00
softemu8xx.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
stacktrace.c
suspend.c update email address 2010-07-19 10:56:54 +02:00
swsusp_32.S Fix common misspellings 2011-03-31 11:26:23 -03:00
swsusp_64.c
swsusp_asm64.S
swsusp_booke.S powerpc/fsl-booke: Add hibernation support for FSL BookE processors 2010-05-21 07:41:53 -05:00
swsusp.c
sys_ppc32.c BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
syscalls.c Add generic sys_olduname() 2010-03-12 15:52:32 -08:00
sysfs.c powerpc: Per process DSCR + some fixes (try#4) 2011-04-27 14:18:19 +10:00
systbl_chk.c
systbl_chk.sh
systbl.S
tau_6xx.c
time.c powerpc: Fix oops if scan_dispatch_log is called too early 2011-04-18 13:08:19 +10:00
traps.c powerpc: Convert old cpumask API into new one 2011-05-04 15:22:59 +10:00
udbg_16550.c powerpc: Add early debug for WSP platforms 2011-05-06 13:32:41 +10:00
udbg.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
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: align percpu readmostly subsection to cacheline 2011-01-25 14:26:50 +01:00