Commit-ID: 155d1d12786386d21732f9bba036343ffa43847d
Gitweb: http://git.kernel.org/tip/155d1d12786386d21732f9bba036343ffa43847d
Author: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
AuthorDate: Tue, 2 Jun 2015 17:26:48 +0200
Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
CommitDate: Wed, 22 Jul 2015 15:27:27 -0700
rcu: Use WRITE_ONCE in RCU_INIT_POINTER
For the paranoid amongst us GCC would be in its right to use byte stores
to write our NULL value, tell it not to do that.
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
---
include/linux/rcupdate.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index def6d45..c63428c 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -995,7 +995,7 @@ static inline notrace void rcu_read_unlock_sched_notrace(void)
#define RCU_INIT_POINTER(p, v) \
do { \
rcu_dereference_sparse(p, __rcu); \
- p = RCU_INITIALIZER(v); \
+ WRITE_ONCE(p, RCU_INITIALIZER(v)); \
} while (0)
/**
--
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