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[CIFS] Add destroy routine for dns_resolver
[safe/jmp/linux-2.6]
/
lib
/
rwsem-spinlock.c
diff --git
a/lib/rwsem-spinlock.c
b/lib/rwsem-spinlock.c
index
40ffde9
..
9df3ca5
100644
(file)
--- a/
lib/rwsem-spinlock.c
+++ b/
lib/rwsem-spinlock.c
@@
-17,27
+17,22
@@
struct rwsem_waiter {
#define RWSEM_WAITING_FOR_WRITE 0x00000002
};
#define RWSEM_WAITING_FOR_WRITE 0x00000002
};
-#if RWSEM_DEBUG
-void rwsemtrace(struct rw_semaphore *sem, const char *str)
-{
- if (sem->debug)
- printk("[%d] %s({%d,%d})\n",
- current->pid, str, sem->activity,
- list_empty(&sem->wait_list) ? 0 : 1);
-}
-#endif
-
/*
* initialise the semaphore
*/
/*
* initialise the semaphore
*/
-void fastcall init_rwsem(struct rw_semaphore *sem)
+void __init_rwsem(struct rw_semaphore *sem, const char *name,
+ struct lock_class_key *key)
{
{
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+ /*
+ * 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, 0);
+#endif
sem->activity = 0;
spin_lock_init(&sem->wait_lock);
INIT_LIST_HEAD(&sem->wait_list);
sem->activity = 0;
spin_lock_init(&sem->wait_lock);
INIT_LIST_HEAD(&sem->wait_list);
-#if RWSEM_DEBUG
- sem->debug = 0;
-#endif
}
/*
}
/*
@@
-56,8
+51,6
@@
__rwsem_do_wake(struct rw_semaphore *sem, int wakewrite)
struct task_struct *tsk;
int woken;
struct task_struct *tsk;
int woken;
- rwsemtrace(sem, "Entering __rwsem_do_wake");
-
waiter = list_entry(sem->wait_list.next, struct rwsem_waiter, list);
if (!wakewrite) {
waiter = list_entry(sem->wait_list.next, struct rwsem_waiter, list);
if (!wakewrite) {
@@
-104,7
+97,6
@@
__rwsem_do_wake(struct rw_semaphore *sem, int wakewrite)
sem->activity += woken;
out:
sem->activity += woken;
out:
- rwsemtrace(sem, "Leaving __rwsem_do_wake");
return sem;
}
return sem;
}
@@
-133,13
+125,11
@@
__rwsem_wake_one_writer(struct rw_semaphore *sem)
/*
* get a read lock on the semaphore
*/
/*
* 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;
{
struct rwsem_waiter waiter;
struct task_struct *tsk;
- rwsemtrace(sem, "Entering __down_read");
-
spin_lock_irq(&sem->wait_lock);
if (sem->activity >= 0 && list_empty(&sem->wait_list)) {
spin_lock_irq(&sem->wait_lock);
if (sem->activity >= 0 && list_empty(&sem->wait_list)) {
@@
-171,20
+161,18
@@
void fastcall __sched __down_read(struct rw_semaphore *sem)
}
tsk->state = TASK_RUNNING;
}
tsk->state = TASK_RUNNING;
-
out:
out:
-
rwsemtrace(sem, "Leaving __down_read")
;
+ ;
}
/*
* trylock for reading -- returns 1 if successful, 0 if contention
*/
}
/*
* 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;
{
unsigned long flags;
int ret = 0;
- rwsemtrace(sem, "Entering __down_read_trylock");
spin_lock_irqsave(&sem->wait_lock, flags);
spin_lock_irqsave(&sem->wait_lock, flags);
@@
-196,7
+184,6
@@
int fastcall __down_read_trylock(struct rw_semaphore *sem)
spin_unlock_irqrestore(&sem->wait_lock, flags);
spin_unlock_irqrestore(&sem->wait_lock, flags);
- rwsemtrace(sem, "Leaving __down_read_trylock");
return ret;
}
return ret;
}
@@
-204,13
+191,11
@@
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
*/
* get a write lock on the semaphore
* - we increment the waiting count anyway to indicate an exclusive lock
*/
-void
fastcall __sched __down_write(struct rw_semaphore *sem
)
+void
__sched __down_write_nested(struct rw_semaphore *sem, int subclass
)
{
struct rwsem_waiter waiter;
struct task_struct *tsk;
{
struct rwsem_waiter waiter;
struct task_struct *tsk;
- rwsemtrace(sem, "Entering __down_write");
-
spin_lock_irq(&sem->wait_lock);
if (sem->activity == 0 && list_empty(&sem->wait_list)) {
spin_lock_irq(&sem->wait_lock);
if (sem->activity == 0 && list_empty(&sem->wait_list)) {
@@
-242,21
+227,23
@@
void fastcall __sched __down_write(struct rw_semaphore *sem)
}
tsk->state = TASK_RUNNING;
}
tsk->state = TASK_RUNNING;
-
out:
out:
- rwsemtrace(sem, "Leaving __down_write");
+ ;
+}
+
+void __sched __down_write(struct rw_semaphore *sem)
+{
+ __down_write_nested(sem, 0);
}
/*
* trylock for writing -- returns 1 if successful, 0 if contention
*/
}
/*
* 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;
{
unsigned long flags;
int ret = 0;
- rwsemtrace(sem, "Entering __down_write_trylock");
-
spin_lock_irqsave(&sem->wait_lock, flags);
if (sem->activity == 0 && list_empty(&sem->wait_list)) {
spin_lock_irqsave(&sem->wait_lock, flags);
if (sem->activity == 0 && list_empty(&sem->wait_list)) {
@@
-267,38
+254,31
@@
int fastcall __down_write_trylock(struct rw_semaphore *sem)
spin_unlock_irqrestore(&sem->wait_lock, flags);
spin_unlock_irqrestore(&sem->wait_lock, flags);
- rwsemtrace(sem, "Leaving __down_write_trylock");
return ret;
}
/*
* release a read lock on the semaphore
*/
return ret;
}
/*
* 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;
{
unsigned long flags;
- rwsemtrace(sem, "Entering __up_read");
-
spin_lock_irqsave(&sem->wait_lock, flags);
if (--sem->activity == 0 && !list_empty(&sem->wait_list))
sem = __rwsem_wake_one_writer(sem);
spin_unlock_irqrestore(&sem->wait_lock, flags);
spin_lock_irqsave(&sem->wait_lock, flags);
if (--sem->activity == 0 && !list_empty(&sem->wait_list))
sem = __rwsem_wake_one_writer(sem);
spin_unlock_irqrestore(&sem->wait_lock, flags);
-
- rwsemtrace(sem, "Leaving __up_read");
}
/*
* release a write lock on the semaphore
*/
}
/*
* 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;
{
unsigned long flags;
- rwsemtrace(sem, "Entering __up_write");
-
spin_lock_irqsave(&sem->wait_lock, flags);
sem->activity = 0;
spin_lock_irqsave(&sem->wait_lock, flags);
sem->activity = 0;
@@
-306,20
+286,16
@@
void fastcall __up_write(struct rw_semaphore *sem)
sem = __rwsem_do_wake(sem, 1);
spin_unlock_irqrestore(&sem->wait_lock, flags);
sem = __rwsem_do_wake(sem, 1);
spin_unlock_irqrestore(&sem->wait_lock, flags);
-
- rwsemtrace(sem, "Leaving __up_write");
}
/*
* downgrade a write lock into a read lock
* - just wake up any readers at the front of the queue
*/
}
/*
* 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;
{
unsigned long flags;
- rwsemtrace(sem, "Entering __downgrade_write");
-
spin_lock_irqsave(&sem->wait_lock, flags);
sem->activity = 1;
spin_lock_irqsave(&sem->wait_lock, flags);
sem->activity = 1;
@@
-327,18
+303,14
@@
void fastcall __downgrade_write(struct rw_semaphore *sem)
sem = __rwsem_do_wake(sem, 0);
spin_unlock_irqrestore(&sem->wait_lock, flags);
sem = __rwsem_do_wake(sem, 0);
spin_unlock_irqrestore(&sem->wait_lock, flags);
-
- rwsemtrace(sem, "Leaving __downgrade_write");
}
}
-EXPORT_SYMBOL(init_rwsem);
+EXPORT_SYMBOL(
__
init_rwsem);
EXPORT_SYMBOL(__down_read);
EXPORT_SYMBOL(__down_read_trylock);
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);
EXPORT_SYMBOL(__down_write);
EXPORT_SYMBOL(__down_write_trylock);
EXPORT_SYMBOL(__up_read);
EXPORT_SYMBOL(__up_write);
EXPORT_SYMBOL(__downgrade_write);
-#if RWSEM_DEBUG
-EXPORT_SYMBOL(rwsemtrace);
-#endif