lib/vsprintf.c: add %pU to print UUID/GUIDs

[safe/jmp/linux-2.6] / lib / rwsem-spinlock.c

diff --git a/lib/rwsem-spinlock.c b/lib/rwsem-spinlock.c
index db4fed7..ccf95bf 100644 (file)
--- a/lib/rwsem-spinlock.c
+++ b/lib/rwsem-spinlock.c
@@ -17,6 +17,19 @@ struct rwsem_waiter {
 #define RWSEM_WAITING_FOR_WRITE        0x00000002
 };
 
+int rwsem_is_locked(struct rw_semaphore *sem)
+{
+       int ret = 1;
+       unsigned long flags;
+
+       if (spin_trylock_irqsave(&sem->wait_lock, flags)) {
+               ret = (sem->activity != 0);
+               spin_unlock_irqrestore(&sem->wait_lock, flags);
+       }
+       return ret;
+}
+EXPORT_SYMBOL(rwsem_is_locked);
+
 /*
  * initialise the semaphore
  */
@@ -28,12 +41,13 @@ void __init_rwsem(struct rw_semaphore *sem, const char *name,
         * Make sure we are not reinitializing a held semaphore:
         */
        debug_check_no_locks_freed((void *)sem, sizeof(*sem));
-       lockdep_init_map(&sem->dep_map, name, key);
+       lockdep_init_map(&sem->dep_map, name, key, 0);
 #endif
        sem->activity = 0;
        spin_lock_init(&sem->wait_lock);
        INIT_LIST_HEAD(&sem->wait_list);
 }
+EXPORT_SYMBOL(__init_rwsem);
 
 /*
  * handle the lock release when processes blocked on it that can now run
@@ -125,7 +139,7 @@ __rwsem_wake_one_writer(struct rw_semaphore *sem)
 /*
  * get a read lock on the semaphore
  */
-void fastcall __sched __down_read(struct rw_semaphore *sem)
+void __sched __down_read(struct rw_semaphore *sem)
 {
        struct rwsem_waiter waiter;
        struct task_struct *tsk;
@@ -168,7 +182,7 @@ void fastcall __sched __down_read(struct rw_semaphore *sem)
 /*
  * trylock for reading -- returns 1 if successful, 0 if contention
  */
-int fastcall __down_read_trylock(struct rw_semaphore *sem)
+int __down_read_trylock(struct rw_semaphore *sem)
 {
        unsigned long flags;
        int ret = 0;
@@ -191,7 +205,7 @@ int fastcall __down_read_trylock(struct rw_semaphore *sem)
  * get a write lock on the semaphore
  * - we increment the waiting count anyway to indicate an exclusive lock
  */
-void fastcall __sched __down_write_nested(struct rw_semaphore *sem, int subclass)
+void __sched __down_write_nested(struct rw_semaphore *sem, int subclass)
 {
        struct rwsem_waiter waiter;
        struct task_struct *tsk;
@@ -231,7 +245,7 @@ void fastcall __sched __down_write_nested(struct rw_semaphore *sem, int subclass
        ;
 }
 
-void fastcall __sched __down_write(struct rw_semaphore *sem)
+void __sched __down_write(struct rw_semaphore *sem)
 {
        __down_write_nested(sem, 0);
 }
@@ -239,7 +253,7 @@ void fastcall __sched __down_write(struct rw_semaphore *sem)
 /*
  * trylock for writing -- returns 1 if successful, 0 if contention
  */
-int fastcall __down_write_trylock(struct rw_semaphore *sem)
+int __down_write_trylock(struct rw_semaphore *sem)
 {
        unsigned long flags;
        int ret = 0;
@@ -260,7 +274,7 @@ int fastcall __down_write_trylock(struct rw_semaphore *sem)
 /*
  * release a read lock on the semaphore
  */
-void fastcall __up_read(struct rw_semaphore *sem)
+void __up_read(struct rw_semaphore *sem)
 {
        unsigned long flags;
 
@@ -275,7 +289,7 @@ void fastcall __up_read(struct rw_semaphore *sem)
 /*
  * release a write lock on the semaphore
  */
-void fastcall __up_write(struct rw_semaphore *sem)
+void __up_write(struct rw_semaphore *sem)
 {
        unsigned long flags;
 
@@ -292,7 +306,7 @@ void fastcall __up_write(struct rw_semaphore *sem)
  * downgrade a write lock into a read lock
  * - just wake up any readers at the front of the queue
  */
-void fastcall __downgrade_write(struct rw_semaphore *sem)
+void __downgrade_write(struct rw_semaphore *sem)
 {
        unsigned long flags;
 
@@ -305,12 +319,3 @@ void fastcall __downgrade_write(struct rw_semaphore *sem)
        spin_unlock_irqrestore(&sem->wait_lock, flags);
 }
 
-EXPORT_SYMBOL(__init_rwsem);
-EXPORT_SYMBOL(__down_read);
-EXPORT_SYMBOL(__down_read_trylock);
-EXPORT_SYMBOL(__down_write_nested);
-EXPORT_SYMBOL(__down_write);
-EXPORT_SYMBOL(__down_write_trylock);
-EXPORT_SYMBOL(__up_read);
-EXPORT_SYMBOL(__up_write);
-EXPORT_SYMBOL(__downgrade_write);