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Oleg Nesterov 7c8df28633 ptrace: revert "Prepare to fix racy accesses on task breakpoints" 
This reverts commit bf26c01849 ("Prepare to fix racy accesses on task
breakpoints").

The patch was fine but we can no longer race with SIGKILL after commit
9899d11f65 ("ptrace: ensure arch_ptrace/ptrace_request can never race
with SIGKILL"), the __TASK_TRACED tracee can't be woken up and
->ptrace_bps[] can't go away.

Now that ptrace_get_breakpoints/ptrace_put_breakpoints have no callers,
we can kill them and remove task->ptrace_bp_refcnt.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Michael Neuling <mikey@neuling.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jan Kratochvil <jan.kratochvil@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Prasad <prasad@linux.vnet.ibm.com>
Cc: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-07-09 10:33:26 -07:00
..
cpu
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debug
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events
perf: Drop sample rate when sampling is too slow
2013-06-23 11:52:57 +02:00
gcov
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irq
Merge tag 'irqdomain-for-linus' of git://git.secretlab.ca/git/linux
2013-07-06 12:37:04 -07:00
power
Merge branch 'akpm' (updates from Andrew Morton)
2013-07-03 17:12:13 -07:00
sched
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-07-06 14:09:38 -07:00
time
clocksource: Reselect clocksource when watchdog validated high-res capability
2013-07-05 11:09:28 +02:00
trace
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.gitignore
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acct.c
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async.c
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audit_tree.c
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audit_watch.c
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audit.c
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audit.h
audit: fix mq_open and mq_unlink to add the MQ root as a hidden parent audit_names record
2013-07-09 10:33:19 -07:00
auditfilter.c
audit: Fix decimal constant description
2013-07-09 10:33:19 -07:00
auditsc.c
audit: fix mq_open and mq_unlink to add the MQ root as a hidden parent audit_names record
2013-07-09 10:33:19 -07:00
backtracetest.c
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bounds.c
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capability.c
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cgroup_freezer.c
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cgroup.c
cgroup: CGRP_ROOT_SUBSYS_BOUND should also be ignored when mounting an existing hierarchy
2013-06-29 14:06:10 -07:00
compat.c
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configs.c
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context_tracking.c
Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-06-20 08:18:35 -10:00
cpu_pm.c
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cpu.c
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cpuset.c
Merge branch 'for-3.11-cpuset' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
2013-07-02 20:04:25 -07:00
crash_dump.c
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cred.c
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delayacct.c
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dma.c
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elfcore.c
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exec_domain.c
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exit.c
ptrace: revert "Prepare to fix racy accesses on task breakpoints"
2013-07-09 10:33:26 -07:00
extable.c
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fork.c
kernel/fork.c:copy_process(): consolidate the lockless CLONE_THREAD checks
2013-07-03 16:08:03 -07:00
freezer.c
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futex_compat.c
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futex.c
futex: Use freezable blocking call
2013-06-25 23:11:19 +02:00
groups.c
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hrtimer.c
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-07-06 14:09:38 -07:00
hung_task.c
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irq_work.c
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itimer.c
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jump_label.c
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kallsyms.c
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kcmp.c
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Kconfig.freezer
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Kconfig.hz
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Kconfig.locks
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Kconfig.preempt
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kexec.c
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kmod.c
usermodehelper: kill the sub_info->path[0] check
2013-07-03 16:08:02 -07:00
kprobes.c
kprobes: handle empty/invalid input to debugfs "enabled" file
2013-07-03 16:07:46 -07:00
ksysfs.c
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kthread.c
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latencytop.c
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lglock.c
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lockdep_internals.h
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lockdep_proc.c
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lockdep_states.h
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lockdep.c
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Makefile
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modsign_certificate.S
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modsign_pubkey.c
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module_signing.c
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module-internal.h
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module.c
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mutex-debug.c
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mutex-debug.h
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mutex.c
mutex: Add w/w mutex slowpath debugging
2013-06-26 12:10:56 +02:00
mutex.h
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notifier.c
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nsproxy.c
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padata.c
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panic.c
panic: add cpu/pid to warn_slowpath_common in WARNING printk()s
2013-07-09 10:33:25 -07:00
params.c
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pid_namespace.c
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pid.c
kernel/pid.c: move statement
2013-07-03 16:08:05 -07:00
posix-cpu-timers.c
posix_timers: fix racy timer delta caching on task exit
2013-07-03 16:54:42 +02:00
posix-timers.c
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printk.c
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profile.c
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ptrace.c
ptrace: revert "Prepare to fix racy accesses on task breakpoints"
2013-07-09 10:33:26 -07:00
range.c
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rcu.h
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rcupdate.c
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rcutiny_plugin.h
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rcutiny.c
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rcutorture.c
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rcutree_plugin.h
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rcutree_trace.c
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rcutree.c
drivers: avoid parsing names as kthread_run() format strings
2013-07-03 16:07:41 -07:00
rcutree.h
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relay.c
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res_counter.c
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resource.c
kernel/resource.c: remove the unneeded assignment in function __find_resource
2013-07-03 16:08:06 -07:00
rtmutex_common.h
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rtmutex-debug.c
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rtmutex-debug.h
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rtmutex-tester.c
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rtmutex.c
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rtmutex.h
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rwsem.c
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seccomp.c
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semaphore.c
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signal.c
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smp.c
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smpboot.c
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smpboot.h
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softirq.c
Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-07-02 16:14:35 -07:00
spinlock.c
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srcu.c
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stacktrace.c
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stop_machine.c
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sys_ni.c
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sys.c
exit.c: unexport __set_special_pids()
2013-07-03 16:08:02 -07:00
sysctl_binary.c
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sysctl.c
perf: Drop sample rate when sampling is too slow
2013-06-23 11:52:57 +02:00
task_work.c
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taskstats.c
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test_kprobes.c
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time.c
sched: Rename sched.c as sched/core.c in comments and Documentation
2013-06-19 12:58:42 +02:00
timeconst.bc
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timer.c
timer: Fix jiffies wrap behavior of round_jiffies_common()
2013-06-28 17:10:11 +02:00
tracepoint.c
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tsacct.c
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uid16.c
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up.c
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user_namespace.c
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user-return-notifier.c
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user.c
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utsname_sysctl.c
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utsname.c
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wait.c
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watchdog.c
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workqueue_internal.h
sched: Rename sched.c as sched/core.c in comments and Documentation
2013-06-19 12:58:42 +02:00
workqueue.c
Merge branch 'for-3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
2013-07-02 19:53:30 -07:00