diff options
Diffstat (limited to 'kernel')
39 files changed, 2144 insertions, 1082 deletions
diff --git a/kernel/Makefile b/kernel/Makefile index 0b5ff083fa22..e0f2831634b4 100644 --- a/kernel/Makefile +++ b/kernel/Makefile @@ -100,6 +100,7 @@ obj-$(CONFIG_FUNCTION_TRACER) += trace/ obj-$(CONFIG_TRACING) += trace/ obj-$(CONFIG_X86_DS) += trace/ obj-$(CONFIG_RING_BUFFER) += trace/ +obj-$(CONFIG_TRACEPOINTS) += trace/ obj-$(CONFIG_SMP) += sched_cpupri.o obj-$(CONFIG_IRQ_WORK) += irq_work.o obj-$(CONFIG_PERF_EVENTS) += perf_event.o diff --git a/kernel/cpu.c b/kernel/cpu.c index f6e726f18491..156cc5556140 100644 --- a/kernel/cpu.c +++ b/kernel/cpu.c @@ -189,7 +189,6 @@ static inline void check_for_tasks(int cpu) } struct take_cpu_down_param { - struct task_struct *caller; unsigned long mod; void *hcpu; }; @@ -198,7 +197,6 @@ struct take_cpu_down_param { static int __ref take_cpu_down(void *_param) { struct take_cpu_down_param *param = _param; - unsigned int cpu = (unsigned long)param->hcpu; int err; /* Ensure this CPU doesn't handle any more interrupts. */ @@ -208,11 +206,6 @@ static int __ref take_cpu_down(void *_param) cpu_notify(CPU_DYING | param->mod, param->hcpu); - if (task_cpu(param->caller) == cpu) - move_task_off_dead_cpu(cpu, param->caller); - /* Force idle task to run as soon as we yield: it should - immediately notice cpu is offline and die quickly. */ - sched_idle_next(); return 0; } @@ -223,7 +216,6 @@ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen) void *hcpu = (void *)(long)cpu; unsigned long mod = tasks_frozen ? CPU_TASKS_FROZEN : 0; struct take_cpu_down_param tcd_param = { - .caller = current, .mod = mod, .hcpu = hcpu, }; @@ -253,9 +245,15 @@ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen) } BUG_ON(cpu_online(cpu)); - /* Wait for it to sleep (leaving idle task). */ + /* + * The migration_call() CPU_DYING callback will have removed all + * runnable tasks from the cpu, there's only the idle task left now + * that the migration thread is done doing the stop_machine thing. + * + * Wait for the stop thread to go away. + */ while (!idle_cpu(cpu)) - yield(); + cpu_relax(); /* This actually kills the CPU. */ __cpu_die(cpu); @@ -386,6 +384,14 @@ out: #ifdef CONFIG_PM_SLEEP_SMP static cpumask_var_t frozen_cpus; +void __weak arch_disable_nonboot_cpus_begin(void) +{ +} + +void __weak arch_disable_nonboot_cpus_end(void) +{ +} + int disable_nonboot_cpus(void) { int cpu, first_cpu, error = 0; @@ -397,6 +403,7 @@ int disable_nonboot_cpus(void) * with the userspace trying to use the CPU hotplug at the same time */ cpumask_clear(frozen_cpus); + arch_disable_nonboot_cpus_begin(); printk("Disabling non-boot CPUs ...\n"); for_each_online_cpu(cpu) { @@ -412,6 +419,8 @@ int disable_nonboot_cpus(void) } } + arch_disable_nonboot_cpus_end(); + if (!error) { BUG_ON(num_online_cpus() > 1); /* Make sure the CPUs won't be enabled by someone else */ diff --git a/kernel/fork.c b/kernel/fork.c index 5447dc7defa9..7d164e25b0f0 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -174,8 +174,10 @@ static inline void free_signal_struct(struct signal_struct *sig) static inline void put_signal_struct(struct signal_struct *sig) { - if (atomic_dec_and_test(&sig->sigcnt)) + if (atomic_dec_and_test(&sig->sigcnt)) { + sched_autogroup_exit(sig); free_signal_struct(sig); + } } void __put_task_struct(struct task_struct *tsk) @@ -905,6 +907,7 @@ static int copy_signal(unsigned long clone_flags, struct task_struct *tsk) posix_cpu_timers_init_group(sig); tty_audit_fork(sig); + sched_autogroup_fork(sig); sig->oom_adj = current->signal->oom_adj; sig->oom_score_adj = current->signal->oom_score_adj; @@ -1315,7 +1318,7 @@ bad_fork_cleanup_mm: } bad_fork_cleanup_signal: if (!(clone_flags & CLONE_THREAD)) - free_signal_struct(p->signal); + put_signal_struct(p->signal); bad_fork_cleanup_sighand: __cleanup_sighand(p->sighand); bad_fork_cleanup_fs: diff --git a/kernel/futex.c b/kernel/futex.c index 40a8777a27d0..3019b92e6917 100644 --- a/kernel/futex.c +++ b/kernel/futex.c @@ -69,6 +69,14 @@ int __read_mostly futex_cmpxchg_enabled; #define FUTEX_HASHBITS (CONFIG_BASE_SMALL ? 4 : 8) /* + * Futex flags used to encode options to functions and preserve them across + * restarts. + */ +#define FLAGS_SHARED 0x01 +#define FLAGS_CLOCKRT 0x02 +#define FLAGS_HAS_TIMEOUT 0x04 + +/* * Priority Inheritance state: */ struct futex_pi_state { @@ -123,6 +131,12 @@ struct futex_q { u32 bitset; }; +static const struct futex_q futex_q_init = { + /* list gets initialized in queue_me()*/ + .key = FUTEX_KEY_INIT, + .bitset = FUTEX_BITSET_MATCH_ANY +}; + /* * Hash buckets are shared by all the futex_keys that hash to the same * location. Each key may have multiple futex_q structures, one for each task @@ -283,8 +297,7 @@ again: return 0; } -static inline -void put_futex_key(int fshared, union futex_key *key) +static inline void put_futex_key(union futex_key *key) { drop_futex_key_refs(key); } @@ -870,7 +883,8 @@ double_unlock_hb(struct futex_hash_bucket *hb1, struct futex_hash_bucket *hb2) /* * Wake up waiters matching bitset queued on this futex (uaddr). */ -static int futex_wake(u32 __user *uaddr, int fshared, int nr_wake, u32 bitset) +static int +futex_wake(u32 __user *uaddr, unsigned int flags, int nr_wake, u32 bitset) { struct futex_hash_bucket *hb; struct futex_q *this, *next; @@ -881,7 +895,7 @@ static int futex_wake(u32 __user *uaddr, int fshared, int nr_wake, u32 bitset) if (!bitset) return -EINVAL; - ret = get_futex_key(uaddr, fshared, &key); + ret = get_futex_key(uaddr, flags & FLAGS_SHARED, &key); if (unlikely(ret != 0)) goto out; @@ -907,7 +921,7 @@ static int futex_wake(u32 __user *uaddr, int fshared, int nr_wake, u32 bitset) } spin_unlock(&hb->lock); - put_futex_key(fshared, &key); + put_futex_key(&key); out: return ret; } @@ -917,7 +931,7 @@ out: * to this virtual address: */ static int -futex_wake_op(u32 __user *uaddr1, int fshared, u32 __user *uaddr2, +futex_wake_op(u32 __user *uaddr1, unsigned int flags, u32 __user *uaddr2, int nr_wake, int nr_wake2, int op) { union futex_key key1 = FUTEX_KEY_INIT, key2 = FUTEX_KEY_INIT; @@ -927,10 +941,10 @@ futex_wake_op(u32 __user *uaddr1, int fshared, u32 __user *uaddr2, int ret, op_ret; retry: - ret = get_futex_key(uaddr1, fshared, &key1); + ret = get_futex_key(uaddr1, flags & FLAGS_SHARED, &key1); if (unlikely(ret != 0)) goto out; - ret = get_futex_key(uaddr2, fshared, &key2); + ret = get_futex_key(uaddr2, flags & FLAGS_SHARED, &key2); if (unlikely(ret != 0)) goto out_put_key1; @@ -962,11 +976,11 @@ retry_private: if (ret) goto out_put_keys; - if (!fshared) + if (!(flags & FLAGS_SHARED)) goto retry_private; - put_futex_key(fshared, &key2); - put_futex_key(fshared, &key1); + put_futex_key(&key2); + put_futex_key(&key1); goto retry; } @@ -996,9 +1010,9 @@ retry_private: double_unlock_hb(hb1, hb2); out_put_keys: - put_futex_key(fshared, &key2); + put_futex_key(&key2); out_put_key1: - put_futex_key(fshared, &key1); + put_futex_key(&key1); out: return ret; } @@ -1133,13 +1147,13 @@ static int futex_proxy_trylock_atomic(u32 __user *pifutex, /** * futex_requeue() - Requeue waiters from uaddr1 to uaddr2 * @uaddr1: source futex user address - * @fshared: 0 for a PROCESS_PRIVATE futex, 1 for PROCESS_SHARED + * @flags: futex flags (FLAGS_SHARED, etc.) * @uaddr2: target futex user address * @nr_wake: number of waiters to wake (must be 1 for requeue_pi) * @nr_requeue: number of waiters to requeue (0-INT_MAX) * @cmpval: @uaddr1 expected value (or %NULL) * @requeue_pi: if we are attempting to requeue from a non-pi futex to a - * pi futex (pi to pi requeue is not supported) + * pi futex (pi to pi requeue is not supported) * * Requeue waiters on uaddr1 to uaddr2. In the requeue_pi case, try to acquire * uaddr2 atomically on behalf of the top waiter. @@ -1148,9 +1162,9 @@ static int futex_proxy_trylock_atomic(u32 __user *pifutex, * >=0 - on success, the number of tasks requeued or woken * <0 - on error */ -static int futex_requeue(u32 __user *uaddr1, int fshared, u32 __user *uaddr2, - int nr_wake, int nr_requeue, u32 *cmpval, - int requeue_pi) +static int futex_requeue(u32 __user *uaddr1, unsigned int flags, + u32 __user *uaddr2, int nr_wake, int nr_requeue, + u32 *cmpval, int requeue_pi) { union futex_key key1 = FUTEX_KEY_INIT, key2 = FUTEX_KEY_INIT; int drop_count = 0, task_count = 0, ret; @@ -1191,10 +1205,10 @@ retry: pi_state = NULL; } - ret = get_futex_key(uaddr1, fshared, &key1); + ret = get_futex_key(uaddr1, flags & FLAGS_SHARED, &key1); if (unlikely(ret != 0)) goto out; - ret = get_futex_key(uaddr2, fshared, &key2); + ret = get_futex_key(uaddr2, flags & FLAGS_SHARED, &key2); if (unlikely(ret != 0)) goto out_put_key1; @@ -1216,11 +1230,11 @@ retry_private: if (ret) goto out_put_keys; - if (!fshared) + if (!(flags & FLAGS_SHARED)) goto retry_private; - put_futex_key(fshared, &key2); - put_futex_key(fshared, &key1); + put_futex_key(&key2); + put_futex_key(&key1); goto retry; } if (curval != *cmpval) { @@ -1260,8 +1274,8 @@ retry_private: break; case -EFAULT: double_unlock_hb(hb1, hb2); - put_futex_key(fshared, &key2); - put_futex_key(fshared, &key1); + put_futex_key(&key2); + put_futex_key(&key1); ret = fault_in_user_writeable(uaddr2); if (!ret) goto retry; @@ -1269,8 +1283,8 @@ retry_private: case -EAGAIN: /* The owner was exiting, try again. */ double_unlock_hb(hb1, hb2); - put_futex_key(fshared, &key2); - put_futex_key(fshared, &key1); + put_futex_key(&key2); + put_futex_key(&key1); cond_resched(); goto retry; default: @@ -1352,9 +1366,9 @@ out_unlock: drop_futex_key_refs(&key1); out_put_keys: - put_futex_key(fshared, &key2); + put_futex_key(&key2); out_put_key1: - put_futex_key(fshared, &key1); + put_futex_key(&key1); out: if (pi_state != NULL) free_pi_state(pi_state); @@ -1494,7 +1508,7 @@ static void unqueue_me_pi(struct futex_q *q) * private futexes. */ static int fixup_pi_state_owner(u32 __user *uaddr, struct futex_q *q, - struct task_struct *newowner, int fshared) + struct task_struct *newowner) { u32 newtid = task_pid_vnr(newowner) | FUTEX_WAITERS; struct futex_pi_state *pi_state = q->pi_state; @@ -1587,20 +1601,11 @@ handle_fault: goto retry; } -/* - * In case we must use restart_block to restart a futex_wait, - * we encode in the 'flags' shared capability - */ -#define FLAGS_SHARED 0x01 -#define FLAGS_CLOCKRT 0x02 -#define FLAGS_HAS_TIMEOUT 0x04 - static long futex_wait_restart(struct restart_block *restart); /** * fixup_owner() - Post lock pi_state and corner case management * @uaddr: user address of the futex - * @fshared: whether the futex is shared (1) or not (0) * @q: futex_q (contains pi_state and access to the rt_mutex) * @locked: if the attempt to take the rt_mutex succeeded (1) or not (0) * @@ -1613,8 +1618,7 @@ static long futex_wait_restart(struct restart_block *restart); * 0 - success, lock not taken * <0 - on error (-EFAULT) */ -static int fixup_owner(u32 __user *uaddr, int fshared, struct futex_q *q, - int locked) +static int fixup_owner(u32 __user *uaddr, struct futex_q *q, int locked) { struct task_struct *owner; int ret = 0; @@ -1625,7 +1629,7 @@ static int fixup_owner(u32 __user *uaddr, int fshared, struct futex_q *q, * did a lock-steal - fix up the PI-state in that case: */ if (q->pi_state->owner != current) - ret = fixup_pi_state_owner(uaddr, q, current, fshared); + ret = fixup_pi_state_owner(uaddr, q, current); goto out; } @@ -1652,7 +1656,7 @@ static int fixup_owner(u32 __user *uaddr, int fshared, struct futex_q *q, * lock. Fix the state up. */ owner = rt_mutex_owner(&q->pi_state->pi_mutex); - ret = fixup_pi_state_owner(uaddr, q, owner, fshared); + ret = fixup_pi_state_owner(uaddr, q, owner); goto out; } @@ -1715,7 +1719,7 @@ static void futex_wait_queue_me(struct futex_hash_bucket *hb, struct futex_q *q, * futex_wait_setup() - Prepare to wait on a futex * @uaddr: the futex userspace address * @val: the expected value - * @fshared: whether the futex is shared (1) or not (0) + * @flags: futex flags (FLAGS_SHARED, etc.) * @q: the associated futex_q * @hb: storage for hash_bucket pointer to be returned to caller * @@ -1728,7 +1732,7 @@ static void futex_wait_queue_me(struct futex_hash_bucket *hb, struct futex_q *q, * 0 - uaddr contains val and hb has been locked * <1 - -EFAULT or -EWOULDBLOCK (uaddr does not contain val) and hb is unlcoked */ -static int futex_wait_setup(u32 __user *uaddr, u32 val, int fshared, +static int futex_wait_setup(u32 __user *uaddr, u32 val, unsigned int flags, struct futex_q *q, struct futex_hash_bucket **hb) { u32 uval; @@ -1752,8 +1756,7 @@ static int futex_wait_setup(u32 __user *uaddr, u32 val, int fshared, * rare, but normal. */ retry: - q->key = FUTEX_KEY_INIT; - ret = get_futex_key(uaddr, fshared, &q->key); + ret = get_futex_key(uaddr, flags & FLAGS_SHARED, &q->key); if (unlikely(ret != 0)) return ret; @@ -1769,10 +1772,10 @@ retry_private: if (ret) goto out; - if (!fshared) + if (!(flags & FLAGS_SHARED)) goto retry_private; - put_futex_key(fshared, &q->key); + put_futex_key(&q->key); goto retry; } @@ -1783,32 +1786,29 @@ retry_private: out: if (ret) - put_futex_key(fshared, &q->key); + put_futex_key(&q->key); return ret; } -static int futex_wait(u32 __user *uaddr, int fshared, - u32 val, ktime_t *abs_time, u32 bitset, int clockrt) +static int futex_wait(u32 __user *uaddr, unsigned int flags, u32 val, + ktime_t *abs_time, u32 bitset) { struct hrtimer_sleeper timeout, *to = NULL; struct restart_block *restart; struct futex_hash_bucket *hb; - struct futex_q q; + struct futex_q q = futex_q_init; int ret; if (!bitset) return -EINVAL; - - q.pi_state = NULL; q.bitset = bitset; - q.rt_waiter = NULL; - q.requeue_pi_key = NULL; if (abs_time) { to = &timeout; - hrtimer_init_on_stack(&to->timer, clockrt ? CLOCK_REALTIME : - CLOCK_MONOTONIC, HRTIMER_MODE_ABS); + hrtimer_init_on_stack(&to->timer, (flags & FLAGS_CLOCKRT) ? + CLOCK_REALTIME : CLOCK_MONOTONIC, + HRTIMER_MODE_ABS); hrtimer_init_sleeper(to, current); hrtimer_set_expires_range_ns(&to->timer, *abs_time, current->timer_slack_ns); @@ -1819,7 +1819,7 @@ retry: * Prepare to wait on uaddr. On success, holds hb lock and increments * q.key refs. */ - ret = futex_wait_setup(uaddr, val, fshared, &q, &hb); + ret = futex_wait_setup(uaddr, val, flags, &q, &hb); if (ret) goto out; @@ -1852,12 +1852,7 @@ retry: restart->futex.val = val; restart->futex.time = abs_time->tv64; restart->futex.bitset = bitset; - restart->futex.flags = FLAGS_HAS_TIMEOUT; - - if (fshared) - restart->futex.flags |= FLAGS_SHARED; - if (clockrt) - restart->futex.flags |= FLAGS_CLOCKRT; + restart->futex.flags = flags; ret = -ERESTART_RESTARTBLOCK; @@ -1873,7 +1868,6 @@ out: static long futex_wait_restart(struct restart_block *restart) { u32 __user *uaddr = restart->futex.uaddr; - int fshared = 0; ktime_t t, *tp = NULL; if (restart->futex.flags & FLAGS_HAS_TIMEOUT) { @@ -1881,11 +1875,9 @@ static long futex_wait_restart(struct restart_block *restart) tp = &t; } restart->fn = do_no_restart_syscall; - if (restart->futex.flags & FLAGS_SHARED) - fshared = 1; - return (long)futex_wait(uaddr, fshared, restart->futex.val, tp, - restart->futex.bitset, - restart->futex.flags & FLAGS_CLOCKRT); + + return (long)futex_wait(uaddr, restart->futex.flags, + restart->futex.val, tp, restart->futex.bitset); } @@ -1895,12 +1887,12 @@ static long futex_wait_restart(struct restart_block *restart) * if there are waiters then it will block, it does PI, etc. (Due to * races the kernel might see a 0 value of the futex too.) */ -static int futex_lock_pi(u32 __user *uaddr, int fshared, - int detect, ktime_t *time, int trylock) +static int futex_lock_pi(u32 __user *uaddr, unsigned int flags, int detect, + ktime_t *time, int trylock) { struct hrtimer_sleeper timeout, *to = NULL; struct futex_hash_bucket *hb; - struct futex_q q; + struct futex_q q = futex_q_init; int res, ret; if (refill_pi_state_cache()) @@ -1914,12 +1906,8 @@ static int futex_lock_pi(u32 __user *uaddr, int fshared, hrtimer_set_expires(&to->timer, *time); } - q.pi_state = NULL; - q.rt_waiter = NULL; - q.requeue_pi_key = NULL; retry: - q.key = FUTEX_KEY_INIT; - ret = get_futex_key(uaddr, fshared, &q.key); + ret = get_futex_key(uaddr, flags & FLAGS_SHARED, &q.key); if (unlikely(ret != 0)) goto out; @@ -1941,7 +1929,7 @@ retry_private: * exit to complete. */ queue_unlock(&q, hb); - put_futex_key(fshared, &q.key); + put_futex_key(&q.key); cond_resched(); goto retry; default: @@ -1971,7 +1959,7 @@ retry_private: * Fixup the pi_state owner and possibly acquire the lock if we * haven't already. */ - res = fixup_owner(uaddr, fshared, &q, !ret); + res = fixup_owner(uaddr, &q, !ret); /* * If fixup_owner() returned an error, proprogate that. If it acquired * the lock, clear our -ETIMEDOUT or -EINTR. @@ -1995,7 +1983,7 @@ out_unlock_put_key: queue_unlock(&q, hb); out_put_key: - put_futex_key(fshared, &q.key); + put_futex_key(&q.key); out: if (to) destroy_hrtimer_on_stack(&to->timer); @@ -2008,10 +1996,10 @@ uaddr_faulted: if (ret) goto out_put_key; - if (!fshared) + if (!(flags & FLAGS_SHARED)) goto retry_private; - put_futex_key(fshared, &q.key); + put_futex_key(&q.key); goto retry; } @@ -2020,7 +2008,7 @@ uaddr_faulted: * This is the in-kernel slowpath: we look up the PI state (if any), * and do the rt-mutex unlock. */ -static int futex_unlock_pi(u32 __user *uaddr, int fshared) +static int futex_unlock_pi(u32 __user *uaddr, unsigned int flags) { struct futex_hash_bucket *hb; struct futex_q *this, *next; @@ -2038,7 +2026,7 @@ retry: if ((uval & FUTEX_TID_MASK) != task_pid_vnr(current)) return -EPERM; - ret = get_futex_key(uaddr, fshared, &key); + ret = get_futex_key(uaddr, flags & FLAGS_SHARED, &key); if (unlikely(ret != 0)) goto out; @@ -2093,14 +2081,14 @@ retry: out_unlock: spin_unlock(&hb->lock); - put_futex_key(fshared, &key); + put_futex_key(&key); out: return ret; pi_faulted: spin_unlock(&hb->lock); - put_futex_key(fshared, &key); + put_futex_key(&key); ret = fault_in_user_writeable(uaddr); if (!ret) @@ -2160,7 +2148,7 @@ int handle_early_requeue_pi_wakeup(struct futex_hash_bucket *hb, /** * futex_wait_requeue_pi() - Wait on uaddr and take uaddr2 * @uaddr: the futex we initially wait on (non-pi) - * @fshared: whether the futexes are shared (1) or not (0). They must be + * @flags: futex flags (FLAGS_SHARED, FLAGS_CLOCKRT, etc.), they must be * the same type, no requeueing from private to shared, etc. * @val: the expected value of uaddr * @abs_time: absolute timeout @@ -2198,16 +2186,16 @@ int handle_early_requeue_pi_wakeup(struct futex_hash_bucket *hb, * 0 - On success * <0 - On error */ -static int futex_wait_requeue_pi(u32 __user *uaddr, int fshared, +static int futex_wait_requeue_pi(u32 __user *uaddr, unsigned int flags, u32 val, ktime_t *abs_time, u32 bitset, - int clockrt, u32 __user *uaddr2) + u32 __user *uaddr2) { struct hrtimer_sleeper timeout, *to = NULL; struct rt_mutex_waiter rt_waiter; struct rt_mutex *pi_mutex = NULL; struct futex_hash_bucket *hb; - union futex_key key2; - struct futex_q q; + union futex_key key2 = FUTEX_KEY_INIT; + struct futex_q q = futex_q_init; int res, ret; if (!bitset) @@ -2215,8 +2203,9 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, int fshared, if (abs_time) { to = &timeout; - hrtimer_init_on_stack(&to->timer, clockrt ? CLOCK_REALTIME : - CLOCK_MONOTONIC, HRTIMER_MODE_ABS); + hrtimer_init_on_stack(&to->timer, (flags & FLAGS_CLOCKRT) ? + CLOCK_REALTIME : CLOCK_MONOTONIC, + HRTIMER_MODE_ABS); hrtimer_init_sleeper(to, current); hrtimer_set_expires_range_ns(&to->timer, *abs_time, current->timer_slack_ns); @@ -2229,12 +2218,10 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, int fshared, debug_rt_mutex_init_waiter(&rt_waiter); rt_waiter.task = NULL; - key2 = FUTEX_KEY_INIT; - ret = get_futex_key(uaddr2, fshared, &key2); + ret = get_futex_key(uaddr2, flags & FLAGS_SHARED, &key2); if (unlikely(ret != 0)) goto out; - q.pi_state = NULL; q.bitset = bitset; q.rt_waiter = &rt_waiter; q.requeue_pi_key = &key2; @@ -2243,7 +2230,7 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, int fshared, * Prepare to wait on uaddr. On success, increments q.key (key1) ref * count. */ - ret = futex_wait_setup(uaddr, val, fshared, &q, &hb); + ret = futex_wait_setup(uaddr, val, flags, &q, &hb); if (ret) goto out_key2; @@ -2273,8 +2260,7 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, int fshared, */ if (q.pi_state && (q.pi_state->owner != current)) { spin_lock(q.lock_ptr); - ret = fixup_pi_state_owner(uaddr2, &q, current, - fshared); + ret = fixup_pi_state_owner(uaddr2, &q, current); spin_unlock(q.lock_ptr); } } else { @@ -2293,7 +2279,7 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, int fshared, * Fixup the pi_state owner and possibly acquire the lock if we * haven't already. */ - res = fixup_owner(uaddr2, fshared, &q, !ret); + res = fixup_owner(uaddr2, &q, !ret); /* * If fixup_owner() returned an error, proprogate that. If it * acquired the lock, clear -ETIMEDOUT or -EINTR. @@ -2324,9 +2310,9 @@ static int futex_wait_requeue_pi(u32 __user *uaddr, int fshared, } out_put_keys: - put_futex_key(fshared, &q.key); + put_futex_key(&q.key); out_key2: - put_futex_key(fshared, &key2); + put_futex_key(&key2); out: if (to) { @@ -2551,58 +2537,57 @@ void exit_robust_list(struct task_struct *curr) long do_futex(u32 __user *uaddr, int op, u32 val, ktime_t *timeout, u32 __user *uaddr2, u32 val2, u32 val3) { - int clockrt, ret = -ENOSYS; - int cmd = op & FUTEX_CMD_MASK; - int fshared = 0; + int ret = -ENOSYS, cmd = op & FUTEX_CMD_MASK; + unsigned int flags = 0; if (!(op & FUTEX_PRIVATE_FLAG)) - fshared = 1; + flags |= FLAGS_SHARED; - clockrt = op & FUTEX_CLOCK_REALTIME; - if (clockrt && cmd != FUTEX_WAIT_BITSET && cmd != FUTEX_WAIT_REQUEUE_PI) - return -ENOSYS; + if (op & FUTEX_CLOCK_REALTIME) { + flags |= FLAGS_CLOCKRT; + if (cmd != FUTEX_WAIT_BITSET && cmd != FUTEX_WAIT_REQUEUE_PI) + return -ENOSYS; + } switch (cmd) { case FUTEX_WAIT: val3 = FUTEX_BITSET_MATCH_ANY; case FUTEX_WAIT_BITSET: - ret = futex_wait(uaddr, fshared, val, timeout, val3, clockrt); + ret = futex_wait(uaddr, flags, val, timeout, val3); break; case FUTEX_WAKE: val3 = FUTEX_BITSET_MATCH_ANY; case FUTEX_WAKE_BITSET: - ret = futex_wake(uaddr, fshared, val, val3); + ret = futex_wake(uaddr, flags, val, val3); break; case FUTEX_REQUEUE: - ret = futex_requeue(uaddr, fshared, uaddr2, val, val2, NULL, 0); + ret = futex_requeue(uaddr, flags, uaddr2, val, val2, NULL, 0); break; case FUTEX_CMP_REQUEUE: - ret = futex_requeue(uaddr, fshared, uaddr2, val, val2, &val3, - 0); + ret = futex_requeue(uaddr, flags, uaddr2, val, val2, &val3, 0); break; case FUTEX_WAKE_OP: - ret = futex_wake_op(uaddr, fshared, uaddr2, val, val2, val3); + ret = futex_wake_op(uaddr, flags, uaddr2, val, val2, val3); break; case FUTEX_LOCK_PI: if (futex_cmpxchg_enabled) - ret = futex_lock_pi(uaddr, fshared, val, timeout, 0); + ret = futex_lock_pi(uaddr, flags, val, timeout, 0); break; case FUTEX_UNLOCK_PI: if (futex_cmpxchg_enabled) - ret = futex_unlock_pi(uaddr, fshared); + ret = futex_unlock_pi(uaddr, flags); break; case FUTEX_TRYLOCK_PI: if (futex_cmpxchg_enabled) - ret = futex_lock_pi(uaddr, fshared, 0, timeout, 1); + ret = futex_lock_pi(uaddr, flags, 0, timeout, 1); break; case FUTEX_WAIT_REQUEUE_PI: val3 = FUTEX_BITSET_MATCH_ANY; |