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authorThomas Gleixner <tglx@linutronix.de>2009-11-17 13:54:03 (GMT)
committerThomas Gleixner <tglx@linutronix.de>2009-12-14 22:55:33 (GMT)
commit1d615482547584b9a8bb6316a58fed6ce90dd9ff (patch)
tree21dae4b70acb3ce0bdaeeaee1dbd970be41d26e2 /kernel/rtmutex.c
parentfe841226bd954fba4fd79f037a876053fe9c3217 (diff)
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sched: Convert pi_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.c58
1 files changed, 29 insertions, 29 deletions
diff --git a/kernel/rtmutex.c b/kernel/rtmutex.c
index 29bd4ba..d33da47 100644
--- a/kernel/rtmutex.c
+++ b/kernel/rtmutex.c
@@ -138,9 +138,9 @@ static void rt_mutex_adjust_prio(struct task_struct *task)
{
unsigned long flags;
- spin_lock_irqsave(&task->pi_lock, flags);
+ raw_spin_lock_irqsave(&task->pi_lock, flags);
__rt_mutex_adjust_prio(task);
- spin_unlock_irqrestore(&task->pi_lock, flags);
+ raw_spin_unlock_irqrestore(&task->pi_lock, flags);
}
/*
@@ -195,7 +195,7 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task,
/*
* Task can not go away as we did a get_task() before !
*/
- spin_lock_irqsave(&task->pi_lock, flags);
+ raw_spin_lock_irqsave(&task->pi_lock, flags);
waiter = task->pi_blocked_on;
/*
@@ -232,7 +232,7 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task,
lock = waiter->lock;
if (!spin_trylock(&lock->wait_lock)) {
- spin_unlock_irqrestore(&task->pi_lock, flags);
+ raw_spin_unlock_irqrestore(&task->pi_lock, flags);
cpu_relax();
goto retry;
}
@@ -253,13 +253,13 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task,
plist_add(&waiter->list_entry, &lock->wait_list);
/* Release the task */
- spin_unlock_irqrestore(&task->pi_lock, flags);
+ raw_spin_unlock_irqrestore(&task->pi_lock, flags);
put_task_struct(task);
/* Grab the next task */
task = rt_mutex_owner(lock);
get_task_struct(task);
- spin_lock_irqsave(&task->pi_lock, flags);
+ raw_spin_lock_irqsave(&task->pi_lock, flags);
if (waiter == rt_mutex_top_waiter(lock)) {
/* Boost the owner */
@@ -277,7 +277,7 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task,
__rt_mutex_adjust_prio(task);
}
- spin_unlock_irqrestore(&task->pi_lock, flags);
+ raw_spin_unlock_irqrestore(&task->pi_lock, flags);
top_waiter = rt_mutex_top_waiter(lock);
spin_unlock(&lock->wait_lock);
@@ -288,7 +288,7 @@ static int rt_mutex_adjust_prio_chain(struct task_struct *task,
goto again;
out_unlock_pi:
- spin_unlock_irqrestore(&task->pi_lock, flags);
+ raw_spin_unlock_irqrestore(&task->pi_lock, flags);
out_put_task:
put_task_struct(task);
@@ -313,9 +313,9 @@ static inline int try_to_steal_lock(struct rt_mutex *lock,
if (pendowner == task)
return 1;
- spin_lock_irqsave(&pendowner->pi_lock, flags);
+ raw_spin_lock_irqsave(&pendowner->pi_lock, flags);
if (task->prio >= pendowner->prio) {
- spin_unlock_irqrestore(&pendowner->pi_lock, flags);
+ raw_spin_unlock_irqrestore(&pendowner->pi_lock, flags);
return 0;
}
@@ -325,7 +325,7 @@ static inline int try_to_steal_lock(struct rt_mutex *lock,
* priority.
*/
if (likely(!rt_mutex_has_waiters(lock))) {
- spin_unlock_irqrestore(&pendowner->pi_lock, flags);
+ raw_spin_unlock_irqrestore(&pendowner->pi_lock, flags);
return 1;
}
@@ -333,7 +333,7 @@ static inline int try_to_steal_lock(struct rt_mutex *lock,
next = rt_mutex_top_waiter(lock);
plist_del(&next->pi_list_entry, &pendowner->pi_waiters);
__rt_mutex_adjust_prio(pendowner);
- spin_unlock_irqrestore(&pendowner->pi_lock, flags);
+ raw_spin_unlock_irqrestore(&pendowner->pi_lock, flags);
/*
* We are going to steal the lock and a waiter was
@@ -350,10 +350,10 @@ static inline int try_to_steal_lock(struct rt_mutex *lock,
* might be task:
*/
if (likely(next->task != task)) {
- spin_lock_irqsave(&task->pi_lock, flags);
+ raw_spin_lock_irqsave(&task->pi_lock, flags);
plist_add(&next->pi_list_entry, &task->pi_waiters);
__rt_mutex_adjust_prio(task);
- spin_unlock_irqrestore(&task->pi_lock, flags);
+ raw_spin_unlock_irqrestore(&task->pi_lock, flags);
}
return 1;
}
@@ -420,7 +420,7 @@ static int task_blocks_on_rt_mutex(struct rt_mutex *lock,
unsigned long flags;
int chain_walk = 0, res;
- spin_lock_irqsave(&task->pi_lock, flags);
+ raw_spin_lock_irqsave(&task->pi_lock, flags);
__rt_mutex_adjust_prio(task);
waiter->task = task;
waiter->lock = lock;
@@ -434,17 +434,17 @@ static int task_blocks_on_rt_mutex(struct rt_mutex *lock,
task->pi_blocked_on = waiter;
- spin_unlock_irqrestore(&task->pi_lock, flags);
+ raw_spin_unlock_irqrestore(&task->pi_lock, flags);
if (waiter == rt_mutex_top_waiter(lock)) {
- spin_lock_irqsave(&owner->pi_lock, flags);
+ raw_spin_lock_irqsave(&owner->pi_lock, flags);
plist_del(&top_waiter->pi_list_entry, &owner->pi_waiters);
plist_add(&waiter->pi_list_entry, &owner->pi_waiters);
__rt_mutex_adjust_prio(owner);
if (owner->pi_blocked_on)
chain_walk = 1;
- spin_unlock_irqrestore(&owner->pi_lock, flags);
+ raw_spin_unlock_irqrestore(&owner->pi_lock, flags);
}
else if (debug_rt_mutex_detect_deadlock(waiter, detect_deadlock))
chain_walk = 1;
@@ -483,7 +483,7 @@ static void wakeup_next_waiter(struct rt_mutex *lock)
struct task_struct *pendowner;
unsigned long flags;
- spin_lock_irqsave(&current->pi_lock, flags);
+ raw_spin_lock_irqsave(&current->pi_lock, flags);
waiter = rt_mutex_top_waiter(lock);
plist_del(&waiter->list_entry, &lock->wait_list);
@@ -500,7 +500,7 @@ static void wakeup_next_waiter(struct rt_mutex *lock)
rt_mutex_set_owner(lock, pendowner, RT_MUTEX_OWNER_PENDING);
- spin_unlock_irqrestore(&current->pi_lock, flags);
+ raw_spin_unlock_irqrestore(&current->pi_lock, flags);
/*
* Clear the pi_blocked_on variable and enqueue a possible
@@ -509,7 +509,7 @@ static void wakeup_next_waiter(struct rt_mutex *lock)
* waiter with higher priority than pending-owner->normal_prio
* is blocked on the unboosted (pending) owner.
*/
- spin_lock_irqsave(&pendowner->pi_lock, flags);
+ raw_spin_lock_irqsave(&pendowner->pi_lock, flags);
WARN_ON(!pendowner->pi_blocked_on);
WARN_ON(pendowner->pi_blocked_on != waiter);
@@ -523,7 +523,7 @@ static void wakeup_next_waiter(struct rt_mutex *lock)
next = rt_mutex_top_waiter(lock);
plist_add(&next->pi_list_entry, &pendowner->pi_waiters);
}
- spin_unlock_irqrestore(&pendowner->pi_lock, flags);
+ raw_spin_unlock_irqrestore(&pendowner->pi_lock, flags);
wake_up_process(pendowner);
}
@@ -541,15 +541,15 @@ static void remove_waiter(struct rt_mutex *lock,
unsigned long flags;
int chain_walk = 0;
- spin_lock_irqsave(&current->pi_lock, flags);
+ raw_spin_lock_irqsave(&current->pi_lock, flags);
plist_del(&waiter->list_entry, &lock->wait_list);
waiter->task = NULL;
current->pi_blocked_on = NULL;
- spin_unlock_irqrestore(&current->pi_lock, flags);
+ raw_spin_unlock_irqrestore(&current->pi_lock, flags);
if (first && owner != current) {
- spin_lock_irqsave(&owner->pi_lock, flags);
+ raw_spin_lock_irqsave(&owner->pi_lock, flags);
plist_del(&waiter->pi_list_entry, &owner->pi_waiters);
@@ -564,7 +564,7 @@ static void remove_waiter(struct rt_mutex *lock,
if (owner->pi_blocked_on)
chain_walk = 1;
- spin_unlock_irqrestore(&owner->pi_lock, flags);
+ raw_spin_unlock_irqrestore(&owner->pi_lock, flags);
}
WARN_ON(!plist_node_empty(&waiter->pi_list_entry));
@@ -592,15 +592,15 @@ void rt_mutex_adjust_pi(struct task_struct *task)
struct rt_mutex_waiter *waiter;
unsigned long flags;
- spin_lock_irqsave(&task->pi_lock, flags);
+ raw_spin_lock_irqsave(&task->pi_lock, flags);
waiter = task->pi_blocked_on;
if (!waiter || waiter->list_entry.prio == task->prio) {
- spin_unlock_irqrestore(&task->pi_lock, flags);
+ raw_spin_unlock_irqrestore(&task->pi_lock, flags);
return;
}
- spin_unlock_irqrestore(&task->pi_lock, flags);
+ raw_spin_unlock_irqrestore(&task->pi_lock, flags);
/* gets dropped in rt_mutex_adjust_prio_chain()! */
get_task_struct(task);