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    Subject[PATCH v6 05/11] locking/rwsem: Move rwsem internal function declarations to rwsem-xadd.h
    Date
    We don't need to expose rwsem internal functions which are not supposed
    to be called directly from other kernel code.

    Signed-off-by: Waiman Long <longman@redhat.com>
    ---
    include/linux/rwsem.h | 7 -------
    kernel/locking/rwsem-xadd.h | 7 +++++++
    2 files changed, 7 insertions(+), 7 deletions(-)

    diff --git a/include/linux/rwsem.h b/include/linux/rwsem.h
    index d0f59df..32389ee 100644
    --- a/include/linux/rwsem.h
    +++ b/include/linux/rwsem.h
    @@ -42,13 +42,6 @@ struct rw_semaphore {
    #endif
    };

    -extern struct rw_semaphore *rwsem_down_read_failed(struct rw_semaphore *sem);
    -extern struct rw_semaphore *rwsem_down_read_failed_killable(struct rw_semaphore *sem);
    -extern struct rw_semaphore *rwsem_down_write_failed(struct rw_semaphore *sem);
    -extern struct rw_semaphore *rwsem_down_write_failed_killable(struct rw_semaphore *sem);
    -extern struct rw_semaphore *rwsem_wake(struct rw_semaphore *);
    -extern struct rw_semaphore *rwsem_downgrade_wake(struct rw_semaphore *sem);
    -
    #define RWSEM_UNLOCKED_VALUE 0

    /* In all implementations count != 0 means locked */
    diff --git a/kernel/locking/rwsem-xadd.h b/kernel/locking/rwsem-xadd.h
    index 4c19539..9b30f0c 100644
    --- a/kernel/locking/rwsem-xadd.h
    +++ b/kernel/locking/rwsem-xadd.h
    @@ -90,6 +90,13 @@ static inline void rwsem_set_reader_owned(struct rw_semaphore *sem)

    #define RWSEM_COUNT_IS_LOCKED(c) ((c) & RWSEM_LOCK_MASK)

    +extern struct rw_semaphore *rwsem_down_read_failed(struct rw_semaphore *sem);
    +extern struct rw_semaphore *rwsem_down_read_failed_killable(struct rw_semaphore *sem);
    +extern struct rw_semaphore *rwsem_down_write_failed(struct rw_semaphore *sem);
    +extern struct rw_semaphore *rwsem_down_write_failed_killable(struct rw_semaphore *sem);
    +extern struct rw_semaphore *rwsem_wake(struct rw_semaphore *);
    +extern struct rw_semaphore *rwsem_downgrade_wake(struct rw_semaphore *sem);
    +
    /*
    * lock for reading
    */
    --
    1.8.3.1
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