[Patch] rwsem-spinlock: remove useless function exports

[Amerigo Wang]

These functions need not to be exported, since no drivers should use them.

__init_rwsem() is an exception, because init_rwsem(), which is a macro,
is used.

Cc: David Howells <dhowells@xxxxxxxxxx>
Signed-off-by: WANG Cong <amwang@xxxxxxxxxx>

---
diff --git a/lib/rwsem-spinlock.c b/lib/rwsem-spinlock.c
index 9df3ca5..39a7411 100644
--- a/lib/rwsem-spinlock.c
+++ b/lib/rwsem-spinlock.c
@@ -34,6 +34,7 @@ void __init_rwsem(struct rw_semaphore *sem, const char *name,
 	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
@@ -305,12 +306,3 @@ void __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);
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