[Bluetooth]: Don't update disconnect timer for incoming connections

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

diff --git a/kernel/spinlock.c b/kernel/spinlock.c
index b31e54e..9644a41 100644 (file)
--- a/kernel/spinlock.c
+++ b/kernel/spinlock.c
@@ -7,12 +7,18 @@
  *
  * This file contains the spinlock/rwlock implementations for the
  * SMP and the DEBUG_SPINLOCK cases. (UP-nondebug inlines them)
+ *
+ * Note that some architectures have special knowledge about the
+ * stack frames of these functions in their profile_pc. If you
+ * change anything significant here that could change the stack
+ * frame contact the architecture maintainers.
  */
 
 #include <linux/linkage.h>
 #include <linux/preempt.h>
 #include <linux/spinlock.h>
 #include <linux/interrupt.h>
+#include <linux/debug_locks.h>
 #include <linux/module.h>
 
 /*
@@ -29,8 +35,10 @@ EXPORT_SYMBOL(generic__raw_read_trylock);
 int __lockfunc _spin_trylock(spinlock_t *lock)
 {
        preempt_disable();
-       if (_raw_spin_trylock(lock))
+       if (_raw_spin_trylock(lock)) {
+               spin_acquire(&lock->dep_map, 0, 1, _RET_IP_);
                return 1;
+       }
        
        preempt_enable();
        return 0;
@@ -40,8 +48,10 @@ EXPORT_SYMBOL(_spin_trylock);
 int __lockfunc _read_trylock(rwlock_t *lock)
 {
        preempt_disable();
-       if (_raw_read_trylock(lock))
+       if (_raw_read_trylock(lock)) {
+               rwlock_acquire_read(&lock->dep_map, 0, 1, _RET_IP_);
                return 1;
+       }
 
        preempt_enable();
        return 0;
@@ -51,19 +61,28 @@ EXPORT_SYMBOL(_read_trylock);
 int __lockfunc _write_trylock(rwlock_t *lock)
 {
        preempt_disable();
-       if (_raw_write_trylock(lock))
+       if (_raw_write_trylock(lock)) {
+               rwlock_acquire(&lock->dep_map, 0, 1, _RET_IP_);
                return 1;
+       }
 
        preempt_enable();
        return 0;
 }
 EXPORT_SYMBOL(_write_trylock);
 
-#if !defined(CONFIG_PREEMPT) || !defined(CONFIG_SMP)
+/*
+ * If lockdep is enabled then we use the non-preemption spin-ops
+ * even on CONFIG_PREEMPT, because lockdep assumes that interrupts are
+ * not re-enabled during lock-acquire (which the preempt-spin-ops do):
+ */
+#if !defined(CONFIG_PREEMPT) || !defined(CONFIG_SMP) || \
+       defined(CONFIG_DEBUG_LOCK_ALLOC)
 
 void __lockfunc _read_lock(rwlock_t *lock)
 {
        preempt_disable();
+       rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
        _raw_read_lock(lock);
 }
 EXPORT_SYMBOL(_read_lock);
@@ -74,7 +93,17 @@ unsigned long __lockfunc _spin_lock_irqsave(spinlock_t *lock)
 
        local_irq_save(flags);
        preempt_disable();
+       spin_acquire(&lock->dep_map, 0, 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_PROVE_LOCKING
+       _raw_spin_lock(lock);
+#else
        _raw_spin_lock_flags(lock, &flags);
+#endif
        return flags;
 }
 EXPORT_SYMBOL(_spin_lock_irqsave);
@@ -83,6 +112,7 @@ 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);
 }
 EXPORT_SYMBOL(_spin_lock_irq);
@@ -91,6 +121,7 @@ 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);
 }
 EXPORT_SYMBOL(_spin_lock_bh);
@@ -101,6 +132,7 @@ 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);
        return flags;
 }
@@ -110,6 +142,7 @@ 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);
 }
 EXPORT_SYMBOL(_read_lock_irq);
@@ -118,6 +151,7 @@ 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);
 }
 EXPORT_SYMBOL(_read_lock_bh);
@@ -128,6 +162,7 @@ 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);
        return flags;
 }
@@ -137,6 +172,7 @@ 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);
 }
 EXPORT_SYMBOL(_write_lock_irq);
@@ -145,6 +181,7 @@ 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);
 }
 EXPORT_SYMBOL(_write_lock_bh);
@@ -152,6 +189,7 @@ EXPORT_SYMBOL(_write_lock_bh);
 void __lockfunc _spin_lock(spinlock_t *lock)
 {
        preempt_disable();
+       spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
        _raw_spin_lock(lock);
 }
 
@@ -160,6 +198,7 @@ EXPORT_SYMBOL(_spin_lock);
 void __lockfunc _write_lock(rwlock_t *lock)
 {
        preempt_disable();
+       rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
        _raw_write_lock(lock);
 }
 
@@ -255,8 +294,22 @@ BUILD_LOCK_OPS(write, rwlock);
 
 #endif /* CONFIG_PREEMPT */
 
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+
+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);
+}
+
+EXPORT_SYMBOL(_spin_lock_nested);
+
+#endif
+
 void __lockfunc _spin_unlock(spinlock_t *lock)
 {
+       spin_release(&lock->dep_map, 1, _RET_IP_);
        _raw_spin_unlock(lock);
        preempt_enable();
 }
@@ -264,6 +317,7 @@ EXPORT_SYMBOL(_spin_unlock);
 
 void __lockfunc _write_unlock(rwlock_t *lock)
 {
+       rwlock_release(&lock->dep_map, 1, _RET_IP_);
        _raw_write_unlock(lock);
        preempt_enable();
 }
@@ -271,6 +325,7 @@ EXPORT_SYMBOL(_write_unlock);
 
 void __lockfunc _read_unlock(rwlock_t *lock)
 {
+       rwlock_release(&lock->dep_map, 1, _RET_IP_);
        _raw_read_unlock(lock);
        preempt_enable();
 }
@@ -278,6 +333,7 @@ EXPORT_SYMBOL(_read_unlock);
 
 void __lockfunc _spin_unlock_irqrestore(spinlock_t *lock, unsigned long flags)
 {
+       spin_release(&lock->dep_map, 1, _RET_IP_);
        _raw_spin_unlock(lock);
        local_irq_restore(flags);
        preempt_enable();
@@ -286,6 +342,7 @@ EXPORT_SYMBOL(_spin_unlock_irqrestore);
 
 void __lockfunc _spin_unlock_irq(spinlock_t *lock)
 {
+       spin_release(&lock->dep_map, 1, _RET_IP_);
        _raw_spin_unlock(lock);
        local_irq_enable();
        preempt_enable();
@@ -294,14 +351,16 @@ EXPORT_SYMBOL(_spin_unlock_irq);
 
 void __lockfunc _spin_unlock_bh(spinlock_t *lock)
 {
+       spin_release(&lock->dep_map, 1, _RET_IP_);
        _raw_spin_unlock(lock);
        preempt_enable_no_resched();
-       local_bh_enable();
+       local_bh_enable_ip((unsigned long)__builtin_return_address(0));
 }
 EXPORT_SYMBOL(_spin_unlock_bh);
 
 void __lockfunc _read_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
 {
+       rwlock_release(&lock->dep_map, 1, _RET_IP_);
        _raw_read_unlock(lock);
        local_irq_restore(flags);
        preempt_enable();
@@ -310,6 +369,7 @@ EXPORT_SYMBOL(_read_unlock_irqrestore);
 
 void __lockfunc _read_unlock_irq(rwlock_t *lock)
 {
+       rwlock_release(&lock->dep_map, 1, _RET_IP_);
        _raw_read_unlock(lock);
        local_irq_enable();
        preempt_enable();
@@ -318,14 +378,16 @@ EXPORT_SYMBOL(_read_unlock_irq);
 
 void __lockfunc _read_unlock_bh(rwlock_t *lock)
 {
+       rwlock_release(&lock->dep_map, 1, _RET_IP_);
        _raw_read_unlock(lock);
        preempt_enable_no_resched();
-       local_bh_enable();
+       local_bh_enable_ip((unsigned long)__builtin_return_address(0));
 }
 EXPORT_SYMBOL(_read_unlock_bh);
 
 void __lockfunc _write_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
 {
+       rwlock_release(&lock->dep_map, 1, _RET_IP_);
        _raw_write_unlock(lock);
        local_irq_restore(flags);
        preempt_enable();
@@ -334,6 +396,7 @@ EXPORT_SYMBOL(_write_unlock_irqrestore);
 
 void __lockfunc _write_unlock_irq(rwlock_t *lock)
 {
+       rwlock_release(&lock->dep_map, 1, _RET_IP_);
        _raw_write_unlock(lock);
        local_irq_enable();
        preempt_enable();
@@ -342,9 +405,10 @@ EXPORT_SYMBOL(_write_unlock_irq);
 
 void __lockfunc _write_unlock_bh(rwlock_t *lock)
 {
+       rwlock_release(&lock->dep_map, 1, _RET_IP_);
        _raw_write_unlock(lock);
        preempt_enable_no_resched();
-       local_bh_enable();
+       local_bh_enable_ip((unsigned long)__builtin_return_address(0));
 }
 EXPORT_SYMBOL(_write_unlock_bh);
 
@@ -352,11 +416,13 @@ int __lockfunc _spin_trylock_bh(spinlock_t *lock)
 {
        local_bh_disable();
        preempt_disable();
-       if (_raw_spin_trylock(lock))
+       if (_raw_spin_trylock(lock)) {
+               spin_acquire(&lock->dep_map, 0, 1, _RET_IP_);
                return 1;
+       }
 
        preempt_enable_no_resched();
-       local_bh_enable();
+       local_bh_enable_ip((unsigned long)__builtin_return_address(0));
        return 0;
 }
 EXPORT_SYMBOL(_spin_trylock_bh);