diff options
| -rw-r--r-- | kernel/locking/mutex.c | 19 | ||||
| -rw-r--r-- | kernel/locking/rwsem-spinlock.c | 18 | ||||
| -rw-r--r-- | kernel/locking/rwsem-xadd.c | 7 | ||||
| -rw-r--r-- | kernel/locking/semaphore.c | 7 |
4 files changed, 22 insertions, 29 deletions
diff --git a/kernel/locking/mutex.c b/kernel/locking/mutex.c index 9b349619f431..4c7d04362c95 100644 --- a/kernel/locking/mutex.c +++ b/kernel/locking/mutex.c @@ -622,7 +622,6 @@ __mutex_lock_common(struct mutex *lock, long state, unsigned int subclass, struct lockdep_map *nest_lock, unsigned long ip, struct ww_acquire_ctx *ww_ctx, const bool use_ww_ctx) { - struct task_struct *task = current; struct mutex_waiter waiter; unsigned long flags; bool first = false; @@ -656,18 +655,18 @@ __mutex_lock_common(struct mutex *lock, long state, unsigned int subclass, goto skip_wait; debug_mutex_lock_common(lock, &waiter); - debug_mutex_add_waiter(lock, &waiter, task); + debug_mutex_add_waiter(lock, &waiter, current); /* add waiting tasks to the end of the waitqueue (FIFO): */ list_add_tail(&waiter.list, &lock->wait_list); - waiter.task = task; + waiter.task = current; if (__mutex_waiter_is_first(lock, &waiter)) __mutex_set_flag(lock, MUTEX_FLAG_WAITERS); lock_contended(&lock->dep_map, ip); - set_task_state(task, state); + set_task_state(current, state); for (;;) { /* * Once we hold wait_lock, we're serialized against @@ -683,7 +682,7 @@ __mutex_lock_common(struct mutex *lock, long state, unsigned int subclass, * wait_lock. This ensures the lock cancellation is ordered * against mutex_unlock() and wake-ups do not go missing. */ - if (unlikely(signal_pending_state(state, task))) { + if (unlikely(signal_pending_state(state, current))) { ret = -EINTR; goto err; } @@ -702,7 +701,7 @@ __mutex_lock_common(struct mutex *lock, long state, unsigned int subclass, __mutex_set_flag(lock, MUTEX_FLAG_HANDOFF); } - set_task_state(task, state); + set_task_state(current, state); /* * Here we order against unlock; we must either see it change * state back to RUNNING and fall through the next schedule(), @@ -716,9 +715,9 @@ __mutex_lock_common(struct mutex *lock, long state, unsigned int subclass, } spin_lock_mutex(&lock->wait_lock, flags); acquired: - __set_task_state(task, TASK_RUNNING); + __set_task_state(current, TASK_RUNNING); - mutex_remove_waiter(lock, &waiter, task); + mutex_remove_waiter(lock, &waiter, current); if (likely(list_empty(&lock->wait_list))) __mutex_clear_flag(lock, MUTEX_FLAGS); @@ -736,8 +735,8 @@ skip_wait: return 0; err: - __set_task_state(task, TASK_RUNNING); - mutex_remove_waiter(lock, &waiter, task); + __set_task_state(current, TASK_RUNNING); + mutex_remove_waiter(lock, &waiter, current); spin_unlock_mutex(&lock->wait_lock, flags); debug_mutex_free_waiter(&waiter); mutex_release(&lock->dep_map, 1, ip); diff --git a/kernel/locking/rwsem-spinlock.c b/kernel/locking/rwsem-spinlock.c index 1591f6b3539f..60d15d3bb2a8 100644 --- a/kernel/locking/rwsem-spinlock.c +++ b/kernel/locking/rwsem-spinlock.c @@ -128,7 +128,6 @@ __rwsem_wake_one_writer(struct rw_semaphore *sem) void __sched __down_read(struct rw_semaphore *sem) { struct rwsem_waiter waiter; - struct task_struct *tsk; unsigned long flags; raw_spin_lock_irqsave(&sem->wait_lock, flags); @@ -140,13 +139,12 @@ void __sched __down_read(struct rw_semaphore *sem) goto out; } - tsk = current; - set_task_state(tsk, TASK_UNINTERRUPTIBLE); + set_task_state(current, TASK_UNINTERRUPTIBLE); /* set up my own style of waitqueue */ - waiter.task = tsk; + waiter.task = current; waiter.type = RWSEM_WAITING_FOR_READ; - get_task_struct(tsk); + get_task_struct(current); list_add_tail(&waiter.list, &sem->wait_list); @@ -158,10 +156,10 @@ void __sched __down_read(struct rw_semaphore *sem) if (!waiter.task) break; schedule(); - set_task_state(tsk, TASK_UNINTERRUPTIBLE); + set_task_state(current, TASK_UNINTERRUPTIBLE); } - __set_task_state(tsk, TASK_RUNNING); + __set_task_state(current, TASK_RUNNING); out: ; } @@ -194,15 +192,13 @@ int __down_read_trylock(struct rw_semaphore *sem) int __sched __down_write_common(struct rw_semaphore *sem, int state) { struct rwsem_waiter waiter; - struct task_struct *tsk; unsigned long flags; int ret = 0; raw_spin_lock_irqsave(&sem->wait_lock, flags); /* set up my own style of waitqueue */ - tsk = current; - waiter.task = tsk; + waiter.task = current; waiter.type = RWSEM_WAITING_FOR_WRITE; list_add_tail(&waiter.list, &sem->wait_list); @@ -220,7 +216,7 @@ int __sched __down_write_common(struct rw_semaphore *sem, int state) ret = -EINTR; goto out; } - set_task_state(tsk, state); + set_task_state(current, state); raw_spin_unlock_irqrestore(&sem->wait_lock, flags); schedule(); raw_spin_lock_irqsave(&sem->wait_lock, flags); diff --git a/kernel/locking/rwsem-xadd.c b/kernel/locking/rwsem-xadd.c index 631506004f9e..d3b819c7f07f 100644 --- a/kernel/locking/rwsem-xadd.c +++ b/kernel/locking/rwsem-xadd.c @@ -224,10 +224,9 @@ struct rw_semaphore __sched *rwsem_down_read_failed(struct rw_semaphore *sem) { long count, adjustment = -RWSEM_ACTIVE_READ_BIAS; struct rwsem_waiter waiter; - struct task_struct *tsk = current; DEFINE_WAKE_Q(wake_q); - waiter.task = tsk; + waiter.task = current; waiter.type = RWSEM_WAITING_FOR_READ; raw_spin_lock_irq(&sem->wait_lock); @@ -254,13 +253,13 @@ struct rw_semaphore __sched *rwsem_down_read_failed(struct rw_semaphore *sem) /* wait to be given the lock */ while (true) { - set_task_state(tsk, TASK_UNINTERRUPTIBLE); + set_task_state(current, TASK_UNINTERRUPTIBLE); if (!waiter.task) break; schedule(); } - __set_task_state(tsk, TASK_RUNNING); + __set_task_state(current, TASK_RUNNING); return sem; } EXPORT_SYMBOL(rwsem_down_read_failed); diff --git a/kernel/locking/semaphore.c b/kernel/locking/semaphore.c index b8120abe594b..29aac9f9e5e4 100644 --- a/kernel/locking/semaphore.c +++ b/kernel/locking/semaphore.c @@ -204,19 +204,18 @@ struct semaphore_waiter { static inline int __sched __down_common(struct semaphore *sem, long state, long timeout) { - struct task_struct *task = current; struct semaphore_waiter waiter; list_add_tail(&waiter.list, &sem->wait_list); - waiter.task = task; + waiter.task = current; waiter.up = false; for (;;) { - if (signal_pending_state(state, task)) + if (signal_pending_state(state, current)) goto interrupted; if (unlikely(timeout <= 0)) goto timed_out; - __set_task_state(task, state); + __set_task_state(current, state); raw_spin_unlock_irq(&sem->lock); timeout = schedule_timeout(timeout); raw_spin_lock_irq(&sem->lock); |