Darren Hart e4dc5b7a36 futex: clean up fault logic ...

Impact: cleanup

Older versions of the futex code held the mmap_sem which had to
be dropped in order to call get_user(), so a two-pronged fault
handling mechanism was employed to handle faults of the atomic
operations.  The mmap_sem is no longer held, so get_user()
should be adequate.  This patch greatly simplifies the logic and
improves legibility.

Build and boot tested on a 4 way Intel x86_64 workstation.
Passes basic pthread_mutex and PI tests out of
ltp/testcases/realtime.

Signed-off-by: Darren Hart <dvhltc@us.ibm.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
LKML-Reference: <20090312075612.9856.48612.stgit@Aeon>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

2009-03-12 11:20:57 +01:00

..

irq

Merge branch 'core/xen' into x86/urgent

2009-02-04 14:54:56 +01:00

power

PM: Split up sysdev_[suspend|resume] from device_power_[down|up]

2009-02-22 10:33:44 -08:00

time

hrtimers: allow the hot-unplugging of all cpus

2009-01-30 22:35:29 +01:00

trace

tracing: limit the number of loops the ring buffer self test can make

2009-02-18 22:50:01 -05:00

.gitignore

…

acct.c

[CVE-2009-0029] System call wrappers part 04

2009-01-14 14:15:19 +01:00

async.c

async: use list_move_tail

2009-02-08 10:00:26 -08:00

audit_tree.c

audit: validate comparison operations, store them in sane form

2009-01-04 15:14:42 -05:00

audit.c

[PATCH] fix broken timestamps in AVC generated by kernel threads

2008-12-09 02:27:41 -05:00

audit.h

fixing audit rule ordering mess, part 1

2009-01-04 15:14:41 -05:00

auditfilter.c

audit: validate comparison operations, store them in sane form

2009-01-04 15:14:42 -05:00

auditsc.c

make sure that filterkey of task,always rules is reported

2009-01-04 15:14:42 -05:00

backtracetest.c

…

bounds.c

…

capability.c

[CVE-2009-0029] System call wrappers part 04

2009-01-14 14:15:19 +01:00

cgroup_debug.c

…

cgroup_freezer.c

…

cgroup.c

cgroups: fix possible use after free

2009-02-18 15:37:54 -08:00

compat.c

Allow times and time system calls to return small negative values

2009-01-06 15:59:13 -08:00

configs.c

…

cpu.c

stop_machine/cpu hotplug: fix disable_nonboot_cpus

2009-01-07 11:36:14 -08:00

cpuset.c

cpuset: fix possible deadlock in async_rebuild_sched_domains

2009-01-19 02:44:00 +01:00

cred-internals.h

CRED: Inaugurate COW credentials

2008-11-14 10:39:23 +11:00

cred.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6

2009-01-09 13:59:25 -08:00

delayacct.c

schedstat: consolidate per-task cpu runtime stats

2008-12-18 13:54:01 +01:00

dma-coherent.c

dma-coherent: Restore dma_alloc_from_coherent() large alloc fall back policy.

2009-01-21 18:51:53 +09:00

dma.c

…

exec_domain.c

[CVE-2009-0029] System call wrappers part 04

2009-01-14 14:15:19 +01:00

exit.c

signal: re-add dead task accumulation stats.

2009-02-05 13:04:33 +01:00

extable.c

Merge branch 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2008-12-30 16:10:19 -08:00

fork.c

copy_process: fix CLONE_PARENT && parent_exec_id interaction

2009-03-09 13:23:25 -07:00

freezer.c

…

futex_compat.c

CRED: Use RCU to access another task's creds and to release a task's own creds

2008-11-14 10:39:19 +11:00

futex.c

futex: clean up fault logic

2009-03-12 11:20:57 +01:00

hrtimer.c

hrtimer: prevent negative expiry value after clock_was_set()

2009-01-30 22:35:34 +01:00

itimer.c

timers: split process wide cpu clocks/timers

2009-02-05 13:04:33 +01:00

kallsyms.c

Revert "kbuild: strip generated symbols from *.ko"

2009-01-14 21:38:20 +01:00

Kconfig.freezer

…

Kconfig.hz

…

Kconfig.preempt

rcu: provide RCU options on non-preempt architectures too

2008-12-25 09:31:28 +01:00

kexec.c

PM: Split up sysdev_[suspend|resume] from device_power_[down|up]

2009-02-22 10:33:44 -08:00

kfifo.c

…

kgdb.c

…

kmod.c

kmod: fix varargs kernel-doc

2009-01-06 15:59:27 -08:00

kprobes.c

kprobes: check CONFIG_FREEZER instead of CONFIG_PM

2009-01-16 14:32:17 -05:00

ksysfs.c

kernel/ksysfs.c:fix dependence on CONFIG_NET

2009-01-06 10:44:31 -08:00

kthread.c

tracepoints: add DECLARE_TRACE() and DEFINE_TRACE()

2008-11-16 09:01:36 +01:00

latencytop.c

KSYM_SYMBOL_LEN fixes

2008-12-10 08:01:54 -08:00

lockdep_internals.h

…

lockdep_proc.c

…

lockdep.c

Merge branch 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2008-12-30 16:10:19 -08:00

Makefile

PM: fix build for CONFIG_PM unset

2009-02-21 14:17:17 -08:00

marker.c

markers/tracpoints: fix non-modular build

2008-11-16 09:52:03 +01:00

module.c

modules: Use a better scheme for refcounting

2009-02-02 19:17:55 -08:00

mutex-debug.c

…

mutex-debug.h

…

mutex.c

mutex: __used is needed for function referenced only from inline asm

2008-11-24 10:00:28 +01:00

mutex.h

…

notifier.c

Merge commit 'v2.6.28-rc6' into core/debug

2008-11-26 08:22:50 +01:00

ns_cgroup.c

ns_cgroup: remove unused spinlock

2009-01-08 08:31:02 -08:00

nsproxy.c

User namespaces: set of cleanups (v2)

2008-11-24 18:57:41 -05:00

panic.c

oops: increment the oops UUID every time we oops

2009-01-06 15:59:12 -08:00

params.c

…

pid_namespace.c

…

pid.c

pid: generalize task_active_pid_ns

2009-01-08 08:31:12 -08:00

pm_qos_params.c

…

posix-cpu-timers.c

timers: more consistently use clock vs timer

2009-02-13 13:04:05 +01:00

posix-timers.c

[CVE-2009-0029] System call wrappers part 05

2009-01-14 14:15:20 +01:00

printk.c

PM: Fix suspend_console and resume_console to use only one semaphore

2009-02-21 14:17:18 -08:00

profile.c

profiling: fix broken profiling regression

2009-02-10 00:50:37 +01:00

ptrace.c

[CVE-2009-0029] System call wrappers part 27

2009-01-14 14:15:29 +01:00

rcuclassic.c

rcu: Teach RCU that idle task is not quiscent state at boot

2009-02-26 04:08:14 +01:00

rcupdate.c

rcu: Teach RCU that idle task is not quiscent state at boot

2009-02-26 04:08:14 +01:00

rcupreempt_trace.c

"Tree RCU": scalable classic RCU implementation

2008-12-18 21:56:04 +01:00

rcupreempt.c

rcu: Teach RCU that idle task is not quiscent state at boot

2009-02-26 04:08:14 +01:00

rcutorture.c

rcu: fix bug in rcutorture system-shutdown code

2009-01-07 23:36:25 +01:00

rcutree_trace.c

"Tree RCU": scalable classic RCU implementation

2008-12-18 21:56:04 +01:00

rcutree.c

rcu: Teach RCU that idle task is not quiscent state at boot

2009-02-26 04:08:14 +01:00

relay.c

relay: fix lock imbalance in relay_late_setup_files

2009-01-18 20:29:35 +01:00

res_counter.c

memcg: memory cgroup resource counters for hierarchy

2009-01-08 08:31:05 -08:00

resource.c

resources: fix parameter name and kernel-doc

2009-01-15 16:39:38 -08:00

rtmutex_common.h

…

rtmutex-debug.c

…

rtmutex-debug.h

…

rtmutex-tester.c

…

rtmutex.c

…

rtmutex.h

…

rwsem.c

…

sched_clock.c

sched_clock: prevent scd->clock from moving backwards, take #2

2008-12-31 09:53:21 +01:00

sched_cpupri.c

sched: fix section mismatch

2009-01-06 11:07:15 +01:00

sched_cpupri.h

sched: convert struct cpupri_vec cpumask_var_t.

2008-11-24 17:52:22 +01:00

sched_debug.c

sched: partly revert "sched debug: remove NULL checking in print_cfs_rt_rq()"

2009-01-11 02:40:32 +01:00

sched_fair.c

sched: revert recent sync wakeup changes

2009-02-11 14:43:35 +01:00

sched_features.h

…

sched_idletask.c

…

sched_rt.c

sched_rt: don't use first_cpu on cpumask created with cpumask_and

2009-02-01 10:49:52 +01:00

sched_stats.h

timers: split process wide cpu clocks/timers

2009-02-05 13:04:33 +01:00

sched.c

sched: don't allow setuid to succeed if the user does not have rt bandwidth

2009-02-27 11:11:53 +01:00

seccomp.c

x86-64: seccomp: fix 32/64 syscall hole

2009-03-02 15:41:30 -08:00

semaphore.c

…

signal.c

signal: re-add dead task accumulation stats.

2009-02-05 13:04:33 +01:00

smp.c

generic-ipi: use per cpu data for single cpu ipi calls

2009-01-30 18:31:08 +01:00

softirq.c

rcu: increment quiescent state counter in ksoftirqd()

2009-03-04 22:08:45 +01:00

softlockup.c

softlock: fix false panic which can occur if softlockup_thresh is reduced

2009-01-14 11:48:07 +01:00

spinlock.c

…

srcu.c

…

stacktrace.c

stacktrace: provide save_stack_trace_tsk() weak alias

2008-12-25 11:44:43 +01:00

stop_machine.c

stop_machine: introduce stop_machine_create/destroy.

2009-01-05 08:40:14 +10:30

sys_ni.c

[CVE-2009-0029] Make sys_syslog a conditional system call

2009-01-14 14:15:16 +01:00

sys.c

sched: don't allow setuid to succeed if the user does not have rt bandwidth

2009-02-27 11:11:53 +01:00

sysctl_check.c

…

sysctl.c

mm: fix dirty_bytes/dirty_background_bytes sysctls on 64bit arches

2009-02-11 14:25:35 -08:00

taskstats.c

cpumask: convert rest of files in kernel/

2009-01-01 10:12:28 +10:30

test_kprobes.c

kprobes: add tests for register_kprobes

2009-01-06 15:59:20 -08:00

time.c

[CVE-2009-0029] System call wrappers part 01

2009-01-14 14:15:18 +01:00

timeconst.pl

…

timer.c

[CVE-2009-0029] System call wrappers part 27

2009-01-14 14:15:29 +01:00

tracepoint.c

markers/tracpoints: fix non-modular build

2008-11-16 09:52:03 +01:00

tsacct.c

Fix fixpoint divide exception in acct_update_integrals

2009-03-09 08:13:35 -07:00

uid16.c

[CVE-2009-0029] System call wrappers part 19

2009-01-14 14:15:26 +01:00

up.c

smp_call_function_single(): be slightly less stupid, fix #2

2009-01-12 16:04:37 +01:00

user_namespace.c

Fix recursive lock in free_uid()/free_user_ns()

2009-02-27 16:26:21 -08:00

user.c

kernel/user.c: fix a memory leak when freeing up non-init usernamespaces users

2009-03-10 15:55:11 -07:00

utsname_sysctl.c

…

utsname.c

…

wait.c

wait: prevent exclusive waiter starvation

2009-02-05 12:56:48 -08:00

workqueue.c

work_on_cpu: Use our own workqueue.

2009-01-19 22:36:07 +01:00