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Thomas Gleixner 8d4516904b watchdog: Fix CPU hotplug regression 
Norbert reported:
"3.7-rc6 booted with nmi_watchdog=0 fails to suspend to RAM or
 offline CPUs. It's reproducable with a KVM guest and physical
 system."

The reason is that commit bcd951cf(watchdog: Use hotplug thread
infrastructure) missed to take this into account. So the cpu offline
code gets stuck in the teardown function because it accesses non
initialized data structures.

Add a check for watchdog_enabled into that path to cure the issue.

Reported-and-tested-by: Norbert Warmuth <nwarmuth@t-online.de>
Tested-by: Joseph Salisbury <joseph.salisbury@canonical.com>
Link: http://lkml.kernel.org/r/alpine.LFD.2.02.1211231033230.2701@ionos
Link: http://bugs.launchpad.net/bugs/1079534
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2012-12-04 19:56:59 +01:00
..
debug
KGDB/KDB fixes and cleanups
2012-10-13 11:16:58 +09:00
events
perf, powerpc: Fix hw breakpoints returning -ENOSPC
2012-10-30 10:07:58 +01:00
gcov
gcov: disable CONSTRUCTORS for UML
2011-07-26 16:49:45 -07:00
irq
irqdomain: augment add_simple() to allocate descs
2012-10-10 08:57:26 +02:00
power
Merge branch 'pm-qos'
2012-09-17 20:25:51 +02:00
sched
Revert "sched, autogroup: Stop going ahead if autogroup is disabled"
2012-12-03 11:10:24 -08:00
time
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-10-12 22:17:48 +09:00
trace
Merge branch 'tip/perf/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace into perf/urgent
2012-10-21 19:53:34 +02:00
.gitignore
…
acct.c
vfs: make path_openat take a struct filename pointer
2012-10-12 20:15:09 -04:00
async.c
[SCSI] async: make async_synchronize_full() flush all work regardless of domain
2012-07-20 09:07:37 +01:00
audit_tree.c
audit: clean up refcounting in audit-tree
2012-08-15 12:55:22 +02:00
audit_watch.c
audit: optimize audit_compare_dname_path
2012-10-12 00:32:02 -04:00
audit.c
fs: handle failed audit_log_start properly
2012-10-09 23:33:37 -04:00
audit.h
audit: optimize audit_compare_dname_path
2012-10-12 00:32:02 -04:00
auditfilter.c
audit: optimize audit_compare_dname_path
2012-10-12 00:32:02 -04:00
auditsc.c
audit: make audit_inode take struct filename
2012-10-12 20:15:09 -04:00
backtracetest.c
…
bounds.c
memcg: remove direct page_cgroup-to-page pointer
2011-03-23 19:46:28 -07:00
capability.c
userns: Teach inode_capable to understand inodes whose uids map to other namespaces.
2012-05-15 14:59:24 -07:00
cgroup_freezer.c
cgroup: mark subsystems with broken hierarchy support and whine if cgroups are nested for them
2012-09-14 12:01:16 -07:00
cgroup.c
Revert "cgroup: Remove task_lock() from cgroup_post_fork()"
2012-10-19 14:09:35 -07:00
compat.c
new helper: sigsuspend()
2012-05-21 23:52:30 -04:00
configs.c
kernel/configs.c: include MODULE_*() when CONFIG_IKCONFIG_PROC=n
2011-07-25 20:57:15 -07:00
cpu_pm.c
kernel/cpu_pm.c: fix various typos
2012-05-31 17:49:27 -07:00
cpu.c
CPU hotplug, debug: detect imbalance between get_online_cpus() and put_online_cpus()
2012-10-09 16:22:15 +09:00
cpuset.c
cpusets: Remove/update outdated comments
2012-07-24 13:53:28 +02:00
crash_dump.c
Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux
2011-11-06 19:44:47 -08:00
cred.c
userns: Make credential debugging user namespace safe.
2012-08-23 22:54:18 -07:00
delayacct.c
KVM: Steal time implementation
2011-07-14 12:59:14 +03:00
dma.c
Remove all #inclusions of asm/system.h
2012-03-28 18:30:03 +01:00
elfcore.c
…
exec_domain.c
…
exit.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2012-10-02 20:25:04 -07:00
extable.c
extable: Skip sorting if sorted at build time.
2012-04-19 15:06:55 -07:00
fork.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal
2012-10-10 12:02:25 +09:00
freezer.c
PM / Freezer: Remove references to TIF_FREEZE in comments
2012-03-04 23:08:54 +01:00
futex_compat.c
futex: Mark get_robust_list as deprecated
2012-03-29 11:37:17 +02:00
futex.c
futex: avoid wake_futex() for a PI futex_q
2012-11-26 17:41:24 -08:00
groups.c
userns: Convert in_group_p and in_egroup_p to use kgid_t
2012-05-03 03:29:33 -07:00
hrtimer.c
hrtimer: Update hrtimer base offsets each hrtimer_interrupt
2012-07-11 23:34:39 +02:00
hung_task.c
hung task debugging: Inject NMI when hung and going to panic
2012-04-25 12:39:25 +02:00
irq_work.c
irq_work: fix compile failure on tile from missing include
2012-04-13 13:15:16 -04:00
itimer.c
itimer: Use printk_once instead of WARN_ONCE
2012-04-10 11:00:30 +02:00
jump_label.c
jump_label: Export jump_label_rate_limit()
2012-08-06 19:00:35 +03:00
kallsyms.c
vsprintf: fix %ps on non symbols when using kallsyms
2012-05-29 16:22:32 -07:00
kcmp.c
syscalls, x86: add __NR_kcmp syscall
2012-05-31 17:49:32 -07:00
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks
locking: Adjust spin lock inlining Kconfig options
2012-09-13 17:56:13 +02:00
Kconfig.preempt
locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage
2012-03-23 13:18:57 +01:00
kexec.c
kdump: remove unneeded include
2012-10-06 03:05:19 +09:00
kfifo.c
[media] kernel:kfifo: export __kfifo_max_r symbol
2012-04-11 18:24:37 -03:00
kmod.c
infrastructure for saner ret_from_kernel_thread semantics
2012-10-12 13:35:07 -04:00
kprobes.c
kprobes/x86: Fix to support jprobes on ftrace-based kprobe
2012-09-13 22:52:11 -04:00
ksysfs.c
kernel: ksysfs.c is implicitly using stat.h
2011-10-31 09:20:13 -04:00
kthread.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal
2012-10-13 10:05:52 +09:00
latencytop.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
lglock.c
brlocks/lglocks: turn into functions
2012-05-29 23:28:41 -04:00
lockdep_internals.h
…
lockdep_proc.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
lockdep_states.h
…
lockdep.c
lockdep: Check if nested lock is actually held
2012-09-13 17:00:44 +02:00
Makefile
Makefile: Documentation for external tool should be correct
2012-10-25 16:00:53 -07:00
modsign_pubkey.c
MODSIGN: Provide module signing public keys to the kernel
2012-10-10 20:01:22 +10:30
module_signing.c
module_signing: fix printk format warning
2012-10-22 08:56:34 +03:00
module-internal.h
MODSIGN: Move the magic string to the end of a module and eliminate the search
2012-10-19 17:30:40 -07:00
module.c
module: fix out-by-one error in kallsyms
2012-10-31 13:56:37 +10:30
mutex-debug.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
mutex-debug.h
mutex: Use p->on_cpu for the adaptive spin
2011-04-14 08:52:33 +02:00
mutex.c
sched/rt: Use schedule_preempt_disabled()
2012-03-01 10:28:03 +01:00
mutex.h
mutex: Use p->on_cpu for the adaptive spin
2011-04-14 08:52:33 +02:00
notifier.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
nsproxy.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
padata.c
padata: Fix cpu hotplug
2012-03-29 19:52:46 +08:00
panic.c
panic: fix a possible deadlock in panic()
2012-07-30 17:25:13 -07:00
params.c
params: replace printk(KERN_<LVL>...) with pr_<lvl>(...)
2012-05-04 17:28:18 -07:00
pid_namespace.c
pidns: limit the nesting depth of pid namespaces
2012-10-25 14:37:53 -07:00
pid.c
net ip6 flowlabel: Make owner a union of struct pid * and kuid_t
2012-08-14 21:49:25 -07:00
posix-cpu-timers.c
[S390] cputime: add sparse checking and cleanup
2011-12-15 14:56:19 +01:00
posix-timers.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
printk.c
printk: Fix scheduling-while-atomic problem in console_cpu_notify()
2012-10-16 18:17:44 -07:00
profile.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
ptrace.c
ptrace: mark __ptrace_may_access() static
2012-08-03 14:47:17 +10:00
range.c
range: fix bogus misuse of module.h to get printk()
2011-10-31 09:20:11 -04:00
rcu.h
rcu: Allow nesting of rcu_idle_enter() and rcu_idle_exit()
2012-02-21 09:06:12 -08:00
rcupdate.c
rcu: Add PROVE_RCU_DELAY to provoke difficult races
2012-09-23 07:42:49 -07:00
rcutiny_plugin.h
rcu: Move TINY_PREEMPT_RCU away from raw_local_irq_save()
2012-09-23 07:42:51 -07:00
rcutiny.c
rcu: Move TINY_RCU quiescent state out of extended quiescent state
2012-09-23 07:42:52 -07:00
rcutorture.c
rcu: Prevent initialization race in rcutorture kthreads
2012-09-23 07:42:23 -07:00
rcutree_plugin.h
rcu: Make RCU_FAST_NO_HZ handle adaptive ticks
2012-09-26 15:44:02 +02:00
rcutree_trace.c
Merge remote-tracking branch 'tip/smp/hotplug' into next.2012.09.25b
2012-09-25 10:01:45 -07:00
rcutree.c
rcu: Grace-period initialization excludes only RCU notifier
2012-10-08 09:06:38 -07:00
rcutree.h
rcu: Grace-period initialization excludes only RCU notifier
2012-10-08 09:06:38 -07:00
relay.c
splice: fix racy pipe->buffers uses
2012-06-13 21:16:42 +02:00
res_counter.c
rescounters: add res_counter_uncharge_until()
2012-05-29 16:22:27 -07:00
resource.c
kernel/resource.c: fix stack overflow in __reserve_region_with_split()
2012-10-06 03:05:31 +09:00
rtmutex_common.h
…
rtmutex-debug.c
lockdep, rtmutex, bug: Show taint flags on error
2011-12-06 08:16:49 +01:00
rtmutex-debug.h
…
rtmutex-tester.c
rtmutex-tester: convert sysdev_class to a regular subsystem
2011-12-14 14:54:22 -08:00
rtmutex.c
Revert "rcu: Permit rt_mutex_unlock() with irqs disabled"
2011-12-11 10:33:18 -08:00
rtmutex.h
…
rwsem.c
Remove all #inclusions of asm/system.h
2012-03-28 18:30:03 +01:00
seccomp.c
seccomp: fix build warnings when there is no CONFIG_SECCOMP_FILTER
2012-04-18 12:24:52 +10:00
semaphore.c
semaphore: fix improper comment reference to mutex
2012-04-05 17:15:55 -07:00
signal.c
coredump: pass siginfo_t* to do_coredump() and below, not merely signr
2012-10-06 03:05:16 +09:00
smp.c
smp: Remove ipi_call_lock[_irq]()/ipi_call_unlock[_irq]()
2012-06-05 17:27:14 +02:00
smpboot.c
hotplug: Fix UP bug in smpboot hotplug code
2012-08-13 17:01:07 +02:00
smpboot.h
smpboot: Provide infrastructure for percpu hotplug threads
2012-08-13 17:01:07 +02:00
softirq.c
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-10-01 10:43:39 -07:00
spinlock.c
locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage
2012-03-23 13:18:57 +01:00
srcu.c
workqueue: deprecate system_nrt[_freezable]_wq
2012-08-20 14:51:24 -07:00
stacktrace.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
stop_machine.c
Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux
2011-11-06 19:44:47 -08:00
sys_ni.c
syscalls, x86: add __NR_kcmp syscall
2012-05-31 17:49:32 -07:00
sys.c
use clamp_t in UNAME26 fix
2012-10-19 18:51:17 -07:00
sysctl_binary.c
mm: prepare for removal of obsolete /proc/sys/vm/nr_pdflush_threads
2012-07-31 18:42:40 -07:00
sysctl.c
Kconfig: clean up the "#if defined(arch)" list for exception-trace sysctl entry
2012-10-09 16:22:14 +09:00
task_work.c
task_work: task_work_add() should not succeed after exit_task_work()
2012-09-13 16:47:34 +02:00
taskstats.c
taskstats: cgroupstats_user_cmd() may leak on error
2012-10-06 03:05:31 +09:00
test_kprobes.c
…
time.c
time: Move update_vsyscall definitions to timekeeper_internal.h
2012-09-24 12:38:06 -04:00
timeconst.pl
…
timer.c
timers: Fix endless looping between cascade() and internal_add_timer()
2012-10-09 21:27:14 +02:00
tracepoint.c
static keys: Introduce 'struct static_key', static_key_true()/false() and static_key_slow_[inc|dec]()
2012-02-24 10:05:59 +01:00
tsacct.c
userns: Convert taskstats to handle the user and pid namespaces.
2012-09-18 01:01:32 -07:00
uid16.c
userns: Convert setting and getting uid and gid system calls to use kuid and kgid
2012-05-03 03:28:41 -07:00
up.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
user_namespace.c
userns: Add kprojid_t and associated infrastructure in projid.h
2012-09-18 01:01:37 -07:00
user-return-notifier.c
kernel: Map most files to use export.h instead of module.h
2011-10-31 09:20:12 -04:00
user.c
userns: Add kprojid_t and associated infrastructure in projid.h
2012-09-18 01:01:37 -07:00
utsname_sysctl.c
Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux
2011-11-06 19:44:47 -08:00
utsname.c
userns: Use cred->user_ns instead of cred->user->user_ns
2012-04-07 16:55:51 -07:00
wait.c
lockdep/waitqueues: Add better annotation
2011-12-21 10:07:39 +01:00
watchdog.c
watchdog: Fix CPU hotplug regression
2012-12-04 19:56:59 +01:00
workqueue_sched.h
…
workqueue.c
workqueue: mod_delayed_work_on() shouldn't queue timer on 0 delay
2012-12-01 16:43:18 -08:00