1 files changed, 0 insertions, 68 deletions
diff --git a/kernel/locking/rwsem.h b/kernel/locking/rwsem.h
deleted file mode 100644
index a699f4048ba1..000000000000
--- a/kernel/locking/rwsem.h
+++ /dev/null
@@ -1,68 +0,0 @@
-/*
- * The owner field of the rw_semaphore structure will be set to
- * RWSEM_READ_OWNED when a reader grabs the lock. A writer will clear
- * the owner field when it unlocks. A reader, on the other hand, will
- * not touch the owner field when it unlocks.
- *
- * In essence, the owner field now has the following 3 states:
- *  1) 0
- *     - lock is free or the owner hasn't set the field yet
- *  2) RWSEM_READER_OWNED
- *     - lock is currently or previously owned by readers (lock is free
- *       or not set by owner yet)
- *  3) Other non-zero value
- *     - a writer owns the lock
- */
-#define RWSEM_READER_OWNED	((struct task_struct *)1UL)
-
-#ifdef CONFIG_RWSEM_SPIN_ON_OWNER
-/*
- * All writes to owner are protected by WRITE_ONCE() to make sure that
- * store tearing can't happen as optimistic spinners may read and use
- * the owner value concurrently without lock. Read from owner, however,
- * may not need READ_ONCE() as long as the pointer value is only used
- * for comparison and isn't being dereferenced.
- */
-static inline void rwsem_set_owner(struct rw_semaphore *sem)
-{
-	WRITE_ONCE(sem->owner, current);
-}
-
-static inline void rwsem_clear_owner(struct rw_semaphore *sem)
-{
-	WRITE_ONCE(sem->owner, NULL);
-}
-
-static inline void rwsem_set_reader_owned(struct rw_semaphore *sem)
-{
-	/*
-	 * We check the owner value first to make sure that we will only
-	 * do a write to the rwsem cacheline when it is really necessary
-	 * to minimize cacheline contention.
-	 */
-	if (sem->owner != RWSEM_READER_OWNED)
-		WRITE_ONCE(sem->owner, RWSEM_READER_OWNED);
-}
-
-static inline bool rwsem_owner_is_writer(struct task_struct *owner)
-{
-	return owner && owner != RWSEM_READER_OWNED;
-}
-
-static inline bool rwsem_owner_is_reader(struct task_struct *owner)
-{
-	return owner == RWSEM_READER_OWNED;
-}
-#else
-static inline void rwsem_set_owner(struct rw_semaphore *sem)
-{
-}
-
-static inline void rwsem_clear_owner(struct rw_semaphore *sem)
-{
-}
-
-static inline void rwsem_set_reader_owned(struct rw_semaphore *sem)
-{
-}
-#endif