Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6

[pandora-kernel.git] / kernel / spinlock.c

diff --git a/kernel/spinlock.c b/kernel/spinlock.c
index d48143e..cd72424 100644 (file)
--- a/kernel/spinlock.c
+++ b/kernel/spinlock.c
@@ -72,7 +72,7 @@ void __lockfunc _read_lock(rwlock_t *lock)
 {
        preempt_disable();
        rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
-       _raw_read_lock(lock);
+       LOCK_CONTENDED(lock, _raw_read_trylock, _raw_read_lock);
 }
 EXPORT_SYMBOL(_read_lock);
 
@@ -88,8 +88,8 @@ unsigned long __lockfunc _spin_lock_irqsave(spinlock_t *lock)
         * _raw_spin_lock_flags() code, because lockdep assumes
         * that interrupts are not re-enabled during lock-acquire:
         */
-#ifdef CONFIG_PROVE_LOCKING
-       _raw_spin_lock(lock);
+#ifdef CONFIG_LOCKDEP
+       LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock);
 #else
        _raw_spin_lock_flags(lock, &flags);
 #endif
@@ -102,7 +102,7 @@ void __lockfunc _spin_lock_irq(spinlock_t *lock)
        local_irq_disable();
        preempt_disable();
        spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
-       _raw_spin_lock(lock);
+       LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock);
 }
 EXPORT_SYMBOL(_spin_lock_irq);
 
@@ -111,7 +111,7 @@ void __lockfunc _spin_lock_bh(spinlock_t *lock)
        local_bh_disable();
        preempt_disable();
        spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
-       _raw_spin_lock(lock);
+       LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock);
 }
 EXPORT_SYMBOL(_spin_lock_bh);
 
@@ -122,7 +122,7 @@ unsigned long __lockfunc _read_lock_irqsave(rwlock_t *lock)
        local_irq_save(flags);
        preempt_disable();
        rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
-       _raw_read_lock(lock);
+       LOCK_CONTENDED(lock, _raw_read_trylock, _raw_read_lock);
        return flags;
 }
 EXPORT_SYMBOL(_read_lock_irqsave);
@@ -132,7 +132,7 @@ void __lockfunc _read_lock_irq(rwlock_t *lock)
        local_irq_disable();
        preempt_disable();
        rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
-       _raw_read_lock(lock);
+       LOCK_CONTENDED(lock, _raw_read_trylock, _raw_read_lock);
 }
 EXPORT_SYMBOL(_read_lock_irq);
 
@@ -141,7 +141,7 @@ void __lockfunc _read_lock_bh(rwlock_t *lock)
        local_bh_disable();
        preempt_disable();
        rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
-       _raw_read_lock(lock);
+       LOCK_CONTENDED(lock, _raw_read_trylock, _raw_read_lock);
 }
 EXPORT_SYMBOL(_read_lock_bh);
 
@@ -152,7 +152,7 @@ unsigned long __lockfunc _write_lock_irqsave(rwlock_t *lock)
        local_irq_save(flags);
        preempt_disable();
        rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
-       _raw_write_lock(lock);
+       LOCK_CONTENDED(lock, _raw_write_trylock, _raw_write_lock);
        return flags;
 }
 EXPORT_SYMBOL(_write_lock_irqsave);
@@ -162,7 +162,7 @@ void __lockfunc _write_lock_irq(rwlock_t *lock)
        local_irq_disable();
        preempt_disable();
        rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
-       _raw_write_lock(lock);
+       LOCK_CONTENDED(lock, _raw_write_trylock, _raw_write_lock);
 }
 EXPORT_SYMBOL(_write_lock_irq);
 
@@ -171,7 +171,7 @@ void __lockfunc _write_lock_bh(rwlock_t *lock)
        local_bh_disable();
        preempt_disable();
        rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
-       _raw_write_lock(lock);
+       LOCK_CONTENDED(lock, _raw_write_trylock, _raw_write_lock);
 }
 EXPORT_SYMBOL(_write_lock_bh);
 
@@ -179,7 +179,7 @@ void __lockfunc _spin_lock(spinlock_t *lock)
 {
        preempt_disable();
        spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
-       _raw_spin_lock(lock);
+       LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock);
 }
 
 EXPORT_SYMBOL(_spin_lock);
@@ -188,7 +188,7 @@ void __lockfunc _write_lock(rwlock_t *lock)
 {
        preempt_disable();
        rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
-       _raw_write_lock(lock);
+       LOCK_CONTENDED(lock, _raw_write_trylock, _raw_write_lock);
 }
 
 EXPORT_SYMBOL(_write_lock);
@@ -215,7 +215,7 @@ void __lockfunc _##op##_lock(locktype##_t *lock)                    \
                if (!(lock)->break_lock)                                \
                        (lock)->break_lock = 1;                         \
                while (!op##_can_lock(lock) && (lock)->break_lock)      \
-                       cpu_relax();                                    \
+                       _raw_##op##_relax(&lock->raw_lock);             \
        }                                                               \
        (lock)->break_lock = 0;                                         \
 }                                                                      \
@@ -237,7 +237,7 @@ unsigned long __lockfunc _##op##_lock_irqsave(locktype##_t *lock)   \
                if (!(lock)->break_lock)                                \
                        (lock)->break_lock = 1;                         \
                while (!op##_can_lock(lock) && (lock)->break_lock)      \
-                       cpu_relax();                                    \
+                       _raw_##op##_relax(&lock->raw_lock);             \
        }                                                               \
        (lock)->break_lock = 0;                                         \
        return flags;                                                   \
@@ -289,10 +289,31 @@ void __lockfunc _spin_lock_nested(spinlock_t *lock, int subclass)
 {
        preempt_disable();
        spin_acquire(&lock->dep_map, subclass, 0, _RET_IP_);
-       _raw_spin_lock(lock);
+       LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock);
 }
 
 EXPORT_SYMBOL(_spin_lock_nested);
+unsigned long __lockfunc _spin_lock_irqsave_nested(spinlock_t *lock, int subclass)
+{
+       unsigned long flags;
+
+       local_irq_save(flags);
+       preempt_disable();
+       spin_acquire(&lock->dep_map, subclass, 0, _RET_IP_);
+       /*
+        * On lockdep we dont want the hand-coded irq-enable of
+        * _raw_spin_lock_flags() code, because lockdep assumes
+        * that interrupts are not re-enabled during lock-acquire:
+        */
+#ifdef CONFIG_LOCKDEP
+       LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock);
+#else
+       _raw_spin_lock_flags(lock, &flags);
+#endif
+       return flags;
+}
+
+EXPORT_SYMBOL(_spin_lock_irqsave_nested);
 
 #endif