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    Subject[PATCH v6 5/5] qrwlock: Use smp_store_release() in write_unlock()
    Date
    This patch modifies the queue_write_unlock() function to use the
    new smp_store_release() function in another pending patch. This patch
    should only be merged if the other patch was merged.

    Signed-off-by: Waiman Long <Waiman.Long@hp.com>
    ---
    include/asm-generic/qrwlock.h | 4 +---
    1 files changed, 1 insertions(+), 3 deletions(-)

    diff --git a/include/asm-generic/qrwlock.h b/include/asm-generic/qrwlock.h
    index 288fb00..479c142 100644
    --- a/include/asm-generic/qrwlock.h
    +++ b/include/asm-generic/qrwlock.h
    @@ -219,9 +219,7 @@ static inline void queue_write_unlock(struct qrwlock *lock)
    /*
    * Make sure that none of the critical section will be leaked out.
    */
    - smp_mb__before_clear_bit();
    - ACCESS_ONCE(lock->cnts.writer) = 0;
    - smp_mb__after_clear_bit();
    + smp_store_release(&lock->cnts.writer, 0);
    }

    /*
    --
    1.7.1


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