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>

2 files changed, 27 insertions, 27 deletions

diff --git a/kernel/futex.c b/kernel/futex.c
index 320b369d20b5..8e3c3ffe1b9a 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -760,7 +760,7 @@ static int wake_futex_pi(u32 __user *uaddr, u32 uval, struct futex_q *this)
         if (!pi_state)
                 return -EINVAL;
 
-        spin_lock(&pi_state->pi_mutex.wait_lock);
+        raw_spin_lock(&pi_state->pi_mutex.wait_lock);
         new_owner = rt_mutex_next_owner(&pi_state->pi_mutex);
 
         /*
@@ -789,7 +789,7 @@ static int wake_futex_pi(u32 __user *uaddr, u32 uval, struct futex_q *this)
                 else if (curval != uval)
                         ret = -EINVAL;
                 if (ret) {
-                        spin_unlock(&pi_state->pi_mutex.wait_lock);
+                        raw_spin_unlock(&pi_state->pi_mutex.wait_lock);
                         return ret;
                 }
         }
@@ -805,7 +805,7 @@ static int wake_futex_pi(u32 __user *uaddr, u32 uval, struct futex_q *this)
         pi_state->owner = new_owner;
         raw_spin_unlock_irq(&new_owner->pi_lock);
 
-        spin_unlock(&pi_state->pi_mutex.wait_lock);
+        raw_spin_unlock(&pi_state->pi_mutex.wait_lock);
         rt_mutex_unlock(&pi_state->pi_mutex);
 
         return 0;
diff --git a/kernel/rtmutex.c b/kernel/rtmutex.c
index d33da470f9da..a9604815786a 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