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authorThomas Gleixner <tglx@linutronix.de>2009-11-17 17:22:11 (GMT)
committerThomas Gleixner <tglx@linutronix.de>2009-12-14 22:55:33 (GMT)
commitd209d74d52ab39dc071656533cac095294f70de7 (patch)
treef48ae39908db89df7d93df79ac713318e026f0f7 /kernel/rtmutex.c
parent1d615482547584b9a8bb6316a58fed6ce90dd9ff (diff)
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rtmutes: Convert rtmutex.lock to raw_spinlock
Convert locks which cannot be sleeping locks in preempt-rt to raw_spinlocks. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Peter Zijlstra <peterz@infradead.org> Acked-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/rtmutex.c')
-rw-r--r--kernel/rtmutex.c48
1 files changed, 24 insertions, 24 deletions
diff --git a/kernel/rtmutex.c b/kernel/rtmutex.c
index d33da47..a960481 100644
--- a/kernel/rtmutex.c
+++ b/kernel/rtmutex.c
@@ -231,7 +231,7 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task,
goto out_unlock_pi;
lock = waiter->lock;
- if (!spin_trylock(&lock->wait_lock)) {
+ if (!raw_spin_trylock(&lock->wait_lock)) {
raw_spin_unlock_irqrestore(&task->pi_lock, flags);
cpu_relax();
goto retry;
@@ -240,7 +240,7 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task,
/* Deadlock detection */
if (lock == orig_lock || rt_mutex_owner(lock) == top_task) {
debug_rt_mutex_deadlock(deadlock_detect, orig_waiter, lock);
- spin_unlock(&lock->wait_lock);
+ raw_spin_unlock(&lock->wait_lock);
ret = deadlock_detect ? -EDEADLK : 0;
goto out_unlock_pi;
}
@@ -280,7 +280,7 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task,
raw_spin_unlock_irqrestore(&task->pi_lock, flags);
top_waiter = rt_mutex_top_waiter(lock);
- spin_unlock(&lock->wait_lock);
+ raw_spin_unlock(&lock->wait_lock);
if (!detect_deadlock && waiter != top_waiter)
goto out_put_task;
@@ -459,12 +459,12 @@ static int task_blocks_on_rt_mutex(struct rt_mutex *lock,
*/
get_task_struct(owner);
- spin_unlock(&lock->wait_lock);
+ raw_spin_unlock(&lock->wait_lock);
res = rt_mutex_adjust_prio_chain(owner, detect_deadlock, lock, waiter,
task);
- spin_lock(&lock->wait_lock);
+ raw_spin_lock(&lock->wait_lock);
return res;
}
@@ -575,11 +575,11 @@ static void remove_waiter(struct rt_mutex *lock,
/* gets dropped in rt_mutex_adjust_prio_chain()! */
get_task_struct(owner);
- spin_unlock(&lock->wait_lock);
+ raw_spin_unlock(&lock->wait_lock);
rt_mutex_adjust_prio_chain(owner, 0, lock, NULL, current);
- spin_lock(&lock->wait_lock);
+ raw_spin_lock(&lock->wait_lock);
}
/*
@@ -672,14 +672,14 @@ __rt_mutex_slowlock(struct rt_mutex *lock, int state,
break;
}
- spin_unlock(&lock->wait_lock);
+ raw_spin_unlock(&lock->wait_lock);
debug_rt_mutex_print_deadlock(waiter);
if (waiter->task)
schedule_rt_mutex(lock);
- spin_lock(&lock->wait_lock);
+ raw_spin_lock(&lock->wait_lock);
set_current_state(state);
}
@@ -700,11 +700,11 @@ rt_mutex_slowlock(struct rt_mutex *lock, int state,
debug_rt_mutex_init_waiter(&waiter);
waiter.task = NULL;
- spin_lock(&lock->wait_lock);
+ raw_spin_lock(&lock->wait_lock);
/* Try to acquire the lock again: */
if (try_to_take_rt_mutex(lock)) {
- spin_unlock(&lock->wait_lock);
+ raw_spin_unlock(&lock->wait_lock);
return 0;
}
@@ -731,7 +731,7 @@ rt_mutex_slowlock(struct rt_mutex *lock, int state,
*/
fixup_rt_mutex_waiters(lock);
- spin_unlock(&lock->wait_lock);
+ raw_spin_unlock(&lock->wait_lock);
/* Remove pending timer: */
if (unlikely(timeout))
@@ -758,7 +758,7 @@ rt_mutex_slowtrylock(struct rt_mutex *lock)
{
int ret = 0;
- spin_lock(&lock->wait_lock);
+ raw_spin_lock(&lock->wait_lock);
if (likely(rt_mutex_owner(lock) != current)) {
@@ -770,7 +770,7 @@ rt_mutex_slowtrylock(struct rt_mutex *lock)
fixup_rt_mutex_waiters(lock);
}
- spin_unlock(&lock->wait_lock);
+ raw_spin_unlock(&lock->wait_lock);
return ret;
}
@@ -781,7 +781,7 @@ rt_mutex_slowtrylock(struct rt_mutex *lock)
static void __sched
rt_mutex_slowunlock(struct rt_mutex *lock)
{
- spin_lock(&lock->wait_lock);
+ raw_spin_lock(&lock->wait_lock);
debug_rt_mutex_unlock(lock);
@@ -789,13 +789,13 @@ rt_mutex_slowunlock(struct rt_mutex *lock)
if (!rt_mutex_has_waiters(lock)) {
lock->owner = NULL;
- spin_unlock(&lock->wait_lock);
+ raw_spin_unlock(&lock->wait_lock);
return;
}
wakeup_next_waiter(lock);
- spin_unlock(&lock->wait_lock);
+ raw_spin_unlock(&lock->wait_lock);
/* Undo pi boosting if necessary: */
rt_mutex_adjust_prio(current);
@@ -970,8 +970,8 @@ EXPORT_SYMBOL_GPL(rt_mutex_destroy);
void __rt_mutex_init(struct rt_mutex *lock, const char *name)
{
lock->owner = NULL;
- spin_lock_init(&lock->wait_lock);
- plist_head_init(&lock->wait_list, &lock->wait_lock);
+ raw_spin_lock_init(&lock->wait_lock);
+ plist_head_init_raw(&lock->wait_list, &lock->wait_lock);
debug_rt_mutex_init(lock, name);
}
@@ -1032,7 +1032,7 @@ int rt_mutex_start_proxy_lock(struct rt_mutex *lock,
{
int ret;
- spin_lock(&lock->wait_lock);
+ raw_spin_lock(&lock->wait_lock);
mark_rt_mutex_waiters(lock);
@@ -1040,7 +1040,7 @@ int rt_mutex_start_proxy_lock(struct rt_mutex *lock,
/* We got the lock for task. */
debug_rt_mutex_lock(lock);
rt_mutex_set_owner(lock, task, 0);
- spin_unlock(&lock->wait_lock);
+ raw_spin_unlock(&lock->wait_lock);
rt_mutex_deadlock_account_lock(lock, task);
return 1;
}
@@ -1056,7 +1056,7 @@ int rt_mutex_start_proxy_lock(struct rt_mutex *lock,
*/
ret = 0;
}
- spin_unlock(&lock->wait_lock);
+ raw_spin_unlock(&lock->wait_lock);
debug_rt_mutex_print_deadlock(waiter);
@@ -1106,7 +1106,7 @@ int rt_mutex_finish_proxy_lock(struct rt_mutex *lock,
{
int ret;
- spin_lock(&lock->wait_lock);
+ raw_spin_lock(&lock->wait_lock);
set_current_state(TASK_INTERRUPTIBLE);
@@ -1124,7 +1124,7 @@ int rt_mutex_finish_proxy_lock(struct rt_mutex *lock,
*/
fixup_rt_mutex_waiters(lock);
- spin_unlock(&lock->wait_lock);
+ raw_spin_unlock(&lock->wait_lock);
/*
* Readjust priority, when we did not get the lock. We might have been