[PATCH v6 5/5] qrwlock: Use smp_store_release() in write_unlock()

[Waiman Long <Waiman.Long@hp.com>]

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