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Jeremy Fitzhardinge f445027e4e stop_machine: make stop_machine safe and efficient to call early 
Make stop_machine() safe to call early in boot, before SMP has been set
up, by simply calling the callback function directly if there's only one
CPU online.

[ Fixes from AKPM:
   - add comment
   - local_irq_flags, not save_flags
   - also call hard_irq_disable() for systems which need it

  Tejun suggested using an explicit flag rather than just looking at
  the online cpu count. ]

Cc: Tejun Heo <tj@kernel.org>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: H. Peter Anvin <hpa@linux.intel.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Steven Rostedt <rostedt@goodmis.org>
Acked-by: Tejun Heo <htejun@gmail.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-10-31 17:30:53 -07:00
..
debug
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb
2011-08-01 13:39:40 -10:00
events
mm: distinguish between mlocked and pinned pages
2011-10-31 17:30:46 -07:00
gcov
gcov: disable CONSTRUCTORS for UML
2011-07-26 16:49:45 -07:00
irq
Merge branch 'gpio/next' of git://git.secretlab.ca/git/linux-2.6
2011-10-29 07:27:45 -07:00
power
Merge branch 'devel-stable' of http://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/linux-2.6-arm
2011-10-28 12:02:27 -07:00
time
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2011-10-26 17:15:03 +02:00
trace
Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2011-10-26 17:03:38 +02:00
.gitignore
…
acct.c
pass a struct path to vfs_statfs
2010-08-09 16:48:42 -04:00
async.c
async: uninitialized warning corrections
2011-09-15 14:22:28 +02:00
audit_tree.c
audit_tree,rcu: Convert call_rcu(__put_tree) to kfree_rcu()
2011-07-20 14:10:11 -07:00
audit_watch.c
kill path_lookup()
2011-03-14 09:15:23 -04:00
audit.c
atomic: use <linux/atomic.h>
2011-07-26 16:49:47 -07:00
audit.h
audit: make functions static
2010-10-30 01:42:19 -04:00
auditfilter.c
netlink: kill loginuid/sessionid/sid members from struct netlink_skb_parms
2011-03-03 10:55:40 -08:00
auditsc.c
atomic: use <linux/atomic.h>
2011-07-26 16:49:47 -07:00
backtracetest.c
…
bounds.c
memcg: remove direct page_cgroup-to-page pointer
2011-03-23 19:46:28 -07:00
capability.c
Merge branch 'master' into next
2011-05-19 18:51:57 +10:00
cgroup_freezer.c
cgroups: add per-thread subsystem callbacks
2011-05-26 17:12:34 -07:00
cgroup.c
locking, sched, cgroups: Annotate release_list_lock as raw
2011-09-13 11:11:49 +02:00
compat.c
Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6
2011-07-30 00:08:53 -07:00
configs.c
kernel/configs.c: include MODULE_*() when CONFIG_IKCONFIG_PROC=n
2011-07-25 20:57:15 -07:00
cpu_pm.c
cpu_pm: call notifiers during suspend
2011-09-23 12:05:29 +05:30
cpu.c
Fix common misspellings
2011-03-31 11:26:23 -03:00
cpuset.c
atomic: use <linux/atomic.h>
2011-07-26 16:49:47 -07:00
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
cred.c
Merge branch 'next' of git://selinuxproject.org/~jmorris/linux-security
2011-10-25 09:45:31 +02:00
delayacct.c
KVM: Steal time implementation
2011-07-14 12:59:14 +03:00
dma.c
…
elfcore.c
…
exec_domain.c
sys_personality: remove the bogus checks in sys_personality()->__set_personality() path
2010-08-09 20:45:05 -07:00
exit.c
oom: remove oom_disable_count
2011-10-31 17:30:45 -07:00
extable.c
extable, core_kernel_data(): Make sure all archs define _sdata
2011-05-20 08:56:56 +02:00
fork.c
oom: remove oom_disable_count
2011-10-31 17:30:45 -07:00
freezer.c
PM / Freezer: Make fake_signal_wake_up() wake TASK_KILLABLE tasks too
2011-10-16 23:30:37 +02:00
futex_compat.c
userns: user namespaces: convert several capable() calls
2011-03-23 19:47:08 -07:00
futex.c
Merge branch 'master' into for-next
2011-09-15 15:08:18 +02:00
groups.c
userns: user namespaces: convert several capable() calls
2011-03-23 19:47:08 -07:00
hrtimer.c
hrtimers: Fix typo causing erratic timers
2011-05-25 15:31:58 -07:00
hung_task.c
watchdog, hung_task_timeout: Add Kconfig configurable default
2011-04-28 09:13:17 +02:00
irq_work.c
llist: Add llist_next()
2011-10-04 12:43:53 +02:00
itimer.c
…
jump_label.c
jump_label: Fix jump_label update for modules
2011-06-29 09:59:17 -04:00
kallsyms.c
Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2011-03-25 17:52:22 -07:00
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks
arch:Kconfig.locks Remove unused config option.
2011-04-10 17:01:05 +02:00
Kconfig.preempt
sched: Isolate preempt counting in its own config option
2011-06-10 15:15:40 +02:00
kexec.c
treewide: Convert uses of struct resource to resource_size(ptr)
2011-06-10 14:55:36 +02:00
kfifo.c
kfifo: fix scatterlist usage
2010-10-01 10:50:58 -07:00
kmod.c
kmod: prevent kmod_loop_msg overflow in __request_module()
2011-10-26 13:10:39 +10:30
kprobes.c
locking, kprobes: Annotate the hash locks and kretprobe.lock as raw
2011-09-13 11:11:45 +02:00
ksysfs.c
kernel/ksysfs.c: expose file_caps_enabled in sysfs
2011-04-19 16:45:51 -07:00
kthread.c
cpuset: Fix cpuset_cpus_allowed_fallback(), don't update tsk->rt.nr_cpus_allowed
2011-05-28 17:02:57 +02:00
latencytop.c
locking, latencytop: Annotate latency_lock as raw
2011-09-13 11:12:02 +02:00
lockdep_internals.h
…
lockdep_proc.c
lockdep: Remove unused 'factor' variable from lockdep_stats_show()
2011-03-23 13:54:47 +01:00
lockdep_states.h
…
lockdep.c
Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2011-10-26 16:26:53 +02:00
Makefile
Merge branch 'devel-stable' of http://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/linux-2.6-arm
2011-10-28 12:02:27 -07:00
module.c
Tracepoint: Dissociate from module mutex
2011-08-10 20:38:14 -04:00
mutex-debug.c
mutex: Use p->on_cpu for the adaptive spin
2011-04-14 08:52:33 +02:00
mutex-debug.h
mutex: Use p->on_cpu for the adaptive spin
2011-04-14 08:52:33 +02:00
mutex.c
lockdep, mutex: provide mutex_lock_nest_lock
2011-05-25 08:39:17 -07:00
mutex.h
mutex: Use p->on_cpu for the adaptive spin
2011-04-14 08:52:33 +02:00
notifier.c
notifiers: sys: move reboot notifiers into reboot.h
2011-07-25 20:57:14 -07:00
nsproxy.c
make sure that nsproxy_cache is initialized early enough
2011-07-20 01:44:07 -04:00
padata.c
Fix common misspellings
2011-03-31 11:26:23 -03:00
panic.c
panic: panic=-1 for immediate reboot
2011-07-26 16:49:45 -07:00
params.c
params: make dashes and underscores in parameter names truly equal
2011-10-26 13:10:39 +10:30
pid_namespace.c
pidns: call pid_ns_prepare_proc() from create_pid_namespace()
2011-03-23 19:46:58 -07:00
pid.c
rcu: Restore checks for blocking in RCU read-side critical sections
2011-09-28 21:36:37 -07:00
posix-cpu-timers.c
Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2011-10-26 16:17:32 +02:00
posix-timers.c
posix-timers: RCU conversion
2011-05-24 12:10:51 +02:00
printk.c
locking, printk: Annotate logbuf_lock as raw
2011-09-13 11:11:54 +02:00
profile.c
kernel/profile.c: remove some duplicate code from profile_hits()
2011-05-26 17:12:37 -07:00
ptrace.c
ptrace: PTRACE_LISTEN forgets to unlock ->siglock
2011-09-25 11:02:00 -07:00
range.c
kernel/range.c: fix clean_sort_range() for the case of full array
2010-11-12 07:55:31 -08:00
rcu.h
rcu: Add grace-period, quiescent-state, and call_rcu trace events
2011-09-28 21:38:21 -07:00
rcupdate.c
rcu: Add event-tracing for RCU callback invocation
2011-09-28 21:38:12 -07:00
rcutiny_plugin.h
rcu: Make TINY_RCU also use softirq for RCU_BOOST=n
2011-09-28 21:38:20 -07:00
rcutiny.c
rcu: Add grace-period, quiescent-state, and call_rcu trace events
2011-09-28 21:38:21 -07:00
rcutorture.c
rcu: Make rcu_torture_boost() exit loops at end of test
2011-09-28 21:38:46 -07:00
rcutree_plugin.h
rcu: Remove rcu_needs_cpu_flush() to avoid false quiescent states
2011-09-28 21:38:48 -07:00
rcutree_trace.c
rcu: Simplify quiescent-state accounting
2011-09-28 21:38:22 -07:00
rcutree.c
rcu: Move propagation of ->completed from rcu_start_gp() to rcu_report_qs_rsp()
2011-09-28 21:38:49 -07:00
rcutree.h
rcu: Remove rcu_needs_cpu_flush() to avoid false quiescent states
2011-09-28 21:38:48 -07:00
relay.c
Clean up relay_alloc_page_array() slightly by using vzalloc rather than vmalloc and memset
2010-11-05 08:21:34 -07:00
res_counter.c
memcg: res_counter_read_u64(): fix potential races on 32-bit machines
2011-03-23 19:46:22 -07:00
resource.c
Resource: fix wrong resource window calculation
2011-09-29 20:04:34 -07:00
rtmutex_common.h
rtmutex: Simplify PI algorithm and make highest prio task get lock
2011-01-27 21:13:51 -05:00
rtmutex-debug.c
rtmutex: Add missing rcu_read_unlock() in debug_rt_mutex_print_deadlock()
2011-10-05 13:20:24 +02:00
rtmutex-debug.h
…
rtmutex-tester.c
rtmutex: tester: Remove the remaining BKL leftovers
2011-02-22 22:07:22 +01:00
rtmutex.c
rcu: Permit rt_mutex_unlock() with irqs disabled
2011-09-28 21:38:43 -07:00
rtmutex.h
…
rwsem.c
atomic: use <linux/atomic.h>
2011-07-26 16:49:47 -07:00
sched_autogroup.c
Fix common misspellings
2011-03-31 11:26:23 -03:00
sched_autogroup.h
sched: Skip autogroup when looking for all rt sched groups
2011-07-01 10:39:08 +02:00
sched_clock.c
sched: Add some clock info to sched_debug
2010-11-23 10:29:08 +01:00
sched_cpupri.c
sched/cpupri: Remove cpupri->pri_active
2011-08-14 12:01:11 +02:00
sched_cpupri.h
sched/cpupri: Remove cpupri->pri_active
2011-08-14 12:01:11 +02:00
sched_debug.c
sched: Get rid of lock_depth
2011-04-24 13:18:38 +02:00
sched_fair.c
sched: Wrap scheduler p->cpus_allowed access
2011-10-06 12:46:56 +02:00
sched_features.h
sched: Kill WAKEUP_PREEMPT
2011-08-14 12:00:41 +02:00
sched_idletask.c
sched: Drop the rq argument to sched_class::select_task_rq()
2011-04-14 08:52:36 +02:00
sched_rt.c
sched: Warn on rt throttling
2011-10-06 12:47:04 +02:00
sched_stats.h
locking, sched: Annotate thread_group_cputimer as raw
2011-09-13 11:11:55 +02:00
sched_stoptask.c
sched: Implement hierarchical task accounting for SCHED_OTHER
2011-08-14 12:01:13 +02:00
sched.c
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2011-10-26 17:08:43 +02:00
seccomp.c
…
semaphore.c
locking, semaphores: Annotate inner lock as raw
2011-09-13 11:11:57 +02:00
signal.c
user namespace: usb: make usb urbs user namespace aware (v2)
2011-09-29 13:13:08 -07:00
smp.c
generic-ipi: Fix kexec boot crash by initializing call_single_queue before enabling interrupts
2011-06-17 10:17:12 +02:00
softirq.c
softirq,rcu: Inform RCU of irq_exit() activity
2011-07-20 10:50:12 -07:00
spinlock.c
…
srcu.c
rcu: demote SRCU_SYNCHRONIZE_DELAY from kernel-parameter status
2011-01-14 04:56:49 -08:00
stacktrace.c
stack_trace: Add weak save_stack_trace_regs()
2011-06-14 22:48:52 -04:00
stop_machine.c
stop_machine: make stop_machine safe and efficient to call early
2011-10-31 17:30:53 -07:00
sys_ni.c
Cross Memory Attach
2011-10-31 17:30:44 -07:00
sys.c
Merge branch 'master' of ra.kernel.org:/pub/scm/linux/kernel/git/davem/net
2011-10-24 18:18:09 -04:00
sysctl_binary.c
ipv4: NET_IPV4_ROUTE_GC_INTERVAL removal
2011-10-03 14:13:01 -04:00
sysctl_check.c
xfs: remove subdirectories
2011-08-12 16:21:35 -05:00
sysctl.c
sched: Accumulate per-cfs_rq cpu usage and charge against bandwidth
2011-08-14 12:03:26 +02:00
taskstats.c
Make TASKSTATS require root access
2011-09-19 17:04:37 -07:00
test_kprobes.c
kprobes: Fix selftest to clear flags field for reusing probes
2010-10-14 08:55:27 +02:00
time.c
time: Change jiffies_to_clock_t() argument type to unsigned long
2011-09-21 10:28:51 +02:00
timeconst.pl
…
timer.c
timers: Consider slack value in mod_timer()
2011-06-03 15:02:32 +02:00
tracepoint.c
Tracepoint: Dissociate from module mutex
2011-08-10 20:38:14 -04:00
tsacct.c
Make taskstats round statistics down to nearest 1k bytes/events
2011-09-19 17:10:57 -07:00
uid16.c
userns: user namespaces: convert several capable() calls
2011-03-23 19:47:08 -07:00
up.c
…
user_namespace.c
user_ns: improve the user_ns on-the-slab packaging
2011-01-13 08:03:18 -08:00
user-return-notifier.c
Fix common misspellings
2011-03-31 11:26:23 -03:00
user.c
userns: add a user_namespace as creator/owner of uts_namespace
2011-03-23 19:46:59 -07:00
utsname_sysctl.c
…
utsname.c
ns proc: Add support for the uts namespace
2011-05-10 14:35:35 -07:00
wait.c
Fix common misspellings
2011-03-31 11:26:23 -03:00
watchdog.c
watchdog: Drop FIFO policy in exit path
2011-09-18 14:34:07 +02:00
workqueue_sched.h
workqueue: implement concurrency managed dynamic worker pool
2010-06-29 10:07:14 +02:00
workqueue.c
workqueue: lock cwq access in drain_workqueue
2011-09-14 18:09:38 -07:00