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i2som-imx-linux/kernel
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Oleg Nesterov ed0b72ac1e hw_breakpoint: Use cpu_possible_mask in {reserve,release}_bp_slot() 
commit c790b0ad23 upstream.

fetch_bp_busy_slots() and toggle_bp_slot() use
for_each_online_cpu(), this is obviously wrong wrt cpu_up() or
cpu_down(), we can over/under account the per-cpu numbers.

For example:

	# echo 0 >> /sys/devices/system/cpu/cpu1/online
	# perf record -e mem:0x10 -p 1 &
	# echo 1 >> /sys/devices/system/cpu/cpu1/online
	# perf record -e mem:0x10,mem:0x10,mem:0x10,mem:0x10 -C1 -a &
	# taskset -p 0x2 1

triggers the same WARN_ONCE("Can't find any breakpoint slot") in
arch_install_hw_breakpoint().

Reported-by: Vince Weaver <vincent.weaver@maine.edu>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/20130620155009.GA6327@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-07-03 10:59:01 -07:00
..
debug
kdb,vt_console: Fix missed data due to pager overruns
2012-10-21 09:27:59 -07:00
events
hw_breakpoint: Use cpu_possible_mask in {reserve,release}_bp_slot()
2013-07-03 10:59:01 -07:00
gcov
…
irq
genirq: Avoid deadlock in spurious handling
2013-02-28 06:58:58 -08:00
power
ftrace: Disable function tracing during suspend/resume and hibernation, again
2012-08-09 08:31:29 -07:00
sched
sched: Convert BUG_ON()s in try_to_wake_up_local() to WARN_ON_ONCE()s
2013-04-25 21:19:55 -07:00
time
tick: Cleanup NOHZ per cpu data on cpu down
2013-05-19 10:54:40 -07:00
trace
ftrace: Move ftrace_filter_lseek out of CONFIG_DYNAMIC_FTRACE section
2013-06-13 09:45:03 -07:00
.gitignore
…
acct.c
Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2012-01-08 12:19:57 -08:00
async.c
Fix a dead loop in async_synchronize_full()
2012-10-02 10:30:35 -07:00
audit_tree.c
kernel/audit_tree.c: tree will leak memory when failure occurs in audit_trim_trees()
2013-05-11 13:48:14 -07:00
audit_watch.c
…
audit.c
constify path argument of audit_log_d_path()
2012-03-20 21:29:40 -04:00
audit.h
audit: remove AUDIT_SETUP_CONTEXT as it isn't used
2012-01-17 16:16:57 -05:00
auditfilter.c
audit: allow interfield comparison in audit rules
2012-01-17 16:17:01 -05:00
auditsc.c
kernel-doc: fix new warnings in auditsc.c
2012-01-23 08:44:53 -08:00
backtracetest.c
…
bounds.c
…
capability.c
Revert "capabitlies: ns_capable can use the cap helpers rather than lsm call"
2012-01-17 10:19:41 -08:00
cgroup_freezer.c
cgroup: remove cgroup_subsys argument from callbacks
2012-02-02 09:20:22 -08:00
cgroup.c
cgroup: fix an off-by-one bug which may trigger BUG_ON()
2013-05-07 19:51:56 -07:00
compat.c
compat: Fix RT signal mask corruption via sigprocmask
2012-05-10 08:58:33 -07:00
configs.c
…
cpu_pm.c
…
cpu.c
CPU hotplug: provide a generic helper to disable/enable CPU hotplug
2013-06-20 11:58:44 -07:00
cpuset.c
cpuset: fix cpuset_print_task_mems_allowed() vs rename() race
2013-03-04 06:06:44 +08:00
crash_dump.c
…
cred.c
cred: copy_process() should clear child->replacement_session_keyring
2012-04-11 08:20:11 -07:00
delayacct.c
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dma.c
Remove all #inclusions of asm/system.h
2012-03-28 18:30:03 +01:00
elfcore.c
…
exec_domain.c
…
exit.c
posix_types.h: Cleanup stale __NFDBITS and related definitions
2012-08-09 08:31:39 -07:00
extable.c
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fork.c
mm/fork: fix overflow in vma length when copying mmap on clone
2012-06-10 00:36:06 +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: Revert "futex: Mark get_robust_list as deprecated"
2013-02-28 06:59:01 -08:00
futex.c
futex: Revert "futex: Mark get_robust_list as deprecated"
2013-02-28 06:59:01 -08:00
groups.c
…
hrtimer.c
hrtimer: Add expiry time overflow check in hrtimer_interrupt
2013-05-07 19:51:55 -07:00
hung_task.c
hung_task: fix the broken rcu_lock_break() logic
2012-03-05 15:49:42 -08:00
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
static keys: Inline the static_key_enabled() function
2012-02-28 20:01:08 +01:00
kallsyms.c
…
Kconfig.freezer
…
Kconfig.hz
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Kconfig.locks
locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage
2012-03-23 13:18:57 +01:00
Kconfig.preempt
locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage
2012-03-23 13:18:57 +01:00
kexec.c
Merge branch 'akpm' (Andrew's patch-bomb)
2012-03-28 17:19:28 -07:00
kfifo.c
…
kmod.c
usermodehelper: check subprocess_info->path != NULL
2013-05-19 10:54:50 -07:00
kprobes.c
kprobes: return proper error code from register_kprobe()
2012-03-05 15:49:42 -08:00
ksysfs.c
…
kthread.c
kthread_worker: reimplement flush_kthread_work() to allow freeing the work item being executed
2012-10-02 10:30:40 -07:00
latencytop.c
…
lockdep_internals.h
…
lockdep_proc.c
…
lockdep_states.h
…
lockdep.c
lockdep: Add CPU-idle/offline warning to lockdep-RCU splat
2012-02-21 09:06:06 -08:00
Makefile
sysctl: Move the implementation into fs/proc/proc_sysctl.c
2012-01-24 16:37:54 -08:00
module.c
module: fix out-by-one error in kallsyms
2012-11-26 11:37:41 -08:00
mutex-debug.c
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mutex-debug.h
…
mutex.c
sched/rt: Use schedule_preempt_disabled()
2012-03-01 10:28:03 +01:00
mutex.h
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notifier.c
…
nsproxy.c
…
padata.c
padata: Fix cpu hotplug
2012-03-29 19:52:46 +08:00
panic.c
panic: fix a possible deadlock in panic()
2013-04-12 09:38:47 -07:00
params.c
params: <level>_initcall-like kernel parameters
2012-03-26 12:50:51 +10:30
pid_namespace.c
pidns: add reboot_pid_ns() to handle the reboot syscall
2012-03-28 17:14:36 -07:00
pid.c
vfs: fix panic in __d_lookup() with high dentry hashtable counts
2012-02-13 20:45:38 -05:00
posix-cpu-timers.c
posix-cpu-timers: Fix nanosleep task_struct leak
2013-02-28 06:58:59 -08:00
posix-timers.c
posix-timer: Don't call idr_find() with out-of-range ID
2013-03-04 06:06:38 +08:00
printk.c
printk: fix buffer overflow when calling log_prefix function from call_console_drivers
2013-02-21 10:04:57 -08:00
profile.c
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ptrace.c
ptrace: ensure arch_ptrace/ptrace_request can never race with SIGKILL
2013-01-27 20:47:43 -08:00
range.c
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rcu.h
rcu: Allow nesting of rcu_idle_enter() and rcu_idle_exit()
2012-02-21 09:06:12 -08:00
rcupdate.c
rcu: Check for illegal use of RCU from offlined CPUs
2012-02-21 09:06:03 -08:00
rcutiny_plugin.h
rcu: Simplify unboosting checks
2012-02-21 09:03:43 -08:00
rcutiny.c
rcu: Add RCU_NONIDLE() for idle-loop RCU read-side critical sections
2012-02-21 09:06:13 -08:00
rcutorture.c
PTR_ERR should be called before its argument is cleared.
2012-02-21 09:06:10 -08:00
rcutree_plugin.h
rcu: Hold off RCU_FAST_NO_HZ after timer posted
2012-02-21 09:42:30 -08:00
rcutree_trace.c
rcu: Rework detection of use of RCU by offline CPUs
2012-02-21 09:06:07 -08:00
rcutree.c
rcu: Fix batch-limit size problem
2012-12-17 10:37:46 -08:00
rcutree.h
rcu: Rework detection of use of RCU by offline CPUs
2012-02-21 09:06:07 -08:00
relay.c
splice: fix racy pipe->buffers uses
2012-07-16 09:04:42 -07:00
res_counter.c
net: introduce res_counter_charge_nofail() for socket allocations
2012-01-22 15:08:46 -05:00
resource.c
kernel/resource.c: fix stack overflow in __reserve_region_with_split()
2013-02-14 10:48:53 -08:00
rtmutex_common.h
…
rtmutex-debug.c
…
rtmutex-debug.h
…
rtmutex-tester.c
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rtmutex.c
…
rtmutex.h
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rwsem.c
Remove all #inclusions of asm/system.h
2012-03-28 18:30:03 +01:00
seccomp.c
seccomp: audit abnormal end to a process due to seccomp
2012-01-17 16:16:55 -05:00
semaphore.c
…
signal.c
kernel/signal.c: stop info leak via the tkill and the tgkill syscalls
2013-04-25 21:19:54 -07:00
smp.c
smp: Fix SMP function call empty cpu mask race
2013-02-03 18:24:42 -06:00
softirq.c
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-03-20 10:32:09 -07:00
spinlock.c
locking/kconfig: Simplify INLINE_SPIN_UNLOCK usage
2012-03-23 13:18:57 +01:00
srcu.c
rcu: Call out dangers of expedited RCU primitives
2012-02-21 09:06:08 -08:00
stacktrace.c
…
stop_machine.c
…
sys_ni.c
…
sys.c
reboot: rigrate shutdown/reboot to boot cpu
2013-06-20 11:58:45 -07:00
sysctl_binary.c
sysctl: fix null checking in bin_dn_node_address()
2013-03-04 06:06:41 +08:00
sysctl.c
sysctl: fix write access to dmesg_restrict/kptr_restrict
2012-04-05 14:51:43 +10:00
taskstats.c
…
test_kprobes.c
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time.c
time: Remove bogus comments
2012-03-15 18:17:55 -07:00
timeconst.pl
timeconst.pl: Eliminate Perl warning
2013-02-28 06:58:58 -08:00
timer.c
timer: Don't reinitialize the cpu base lock during CPU_UP_PREPARE
2013-05-19 10:54:39 -07:00
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
…
uid16.c
…
up.c
…
user_namespace.c
…
user-return-notifier.c
…
user.c
…
utsname_sysctl.c
…
utsname.c
…
wait.c
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watchdog.c
watchdog: using u64 in get_sample_period()
2012-12-03 11:47:17 -08:00
workqueue_sched.h
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workqueue.c
workqueue: convert BUG_ON()s in __queue_delayed_work() to WARN_ON_ONCE()s
2012-12-17 10:37:43 -08:00