include/asm-x86/pgtable-2level.h: checkpatch cleanups - formatting only

[sfrench/cifs-2.6.git] / kernel / spinlock.c

diff --git a/kernel/spinlock.c b/kernel/spinlock.c
index 476c3741511b31af1717f90e052880e0e6c9b585..ae28c82451237a7ee0b0d8653701e7eed5437c6b 100644 (file)
--- a/kernel/spinlock.c
+++ b/kernel/spinlock.c
@@ -65,14 +65,13 @@ EXPORT_SYMBOL(_write_trylock);
  * 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)
+#if !defined(CONFIG_GENERIC_LOCKBREAK) || 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);
+       LOCK_CONTENDED(lock, _raw_read_trylock, _raw_read_lock);
 }
 EXPORT_SYMBOL(_read_lock);
 
@@ -88,8 +87,8 @@ 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 +101,7 @@ 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 +110,7 @@ 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 +121,7 @@ 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 +131,7 @@ 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 +140,7 @@ 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 +151,7 @@ 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 +161,7 @@ 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 +170,7 @@ 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 +178,7 @@ 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 +187,7 @@ 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);
@@ -289,10 +288,31 @@ 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