Messages in this thread Patch in this message | | | Date | Tue, 2 Jun 2015 17:26:48 +0200 | From | Peter Zijlstra <> | Subject | [RFC][PATCH] rcu: Use WRITE_ONCE in RCU_INIT_POINTER |
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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@infradead.org> --- 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 33a056bb886f..e173847b6543 100644 --- a/include/linux/rcupdate.h +++ b/include/linux/rcupdate.h @@ -1046,7 +1046,7 @@ 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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