[PATCH tip/core/rcu 06/17] rcu: Remove return value from RCU_INIT_POINTER()

[Paul E. McKenney]

From: "Paul E. McKenney" <paulmck@xxxxxxxxxxxxxxxxxx>

The return value from RCU_INIT_POINTER() is not used, and using it
would be quite ugly, for example:

	q = RCU_INIT_POINTER(global_p, p);

To prevent this sort of ugliness from appearing, this commit wraps
RCU_INIT_POINTER() in a do-while loop.

Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Josh Triplett <josh@xxxxxxxxxxxxxxxx>
---
 include/linux/rcupdate.h |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index 88e4e08..267dc77 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -904,7 +904,9 @@ static inline notrace void rcu_read_unlock_sched_notrace(void)
  * the reader-accessible portions of the linked structure.
  */
 #define RCU_INIT_POINTER(p, v) \
-		p = (typeof(*v) __force __rcu *)(v)
+	do { \
+		p = (typeof(*v) __force __rcu *)(v); \
+	} while (0)
 
 /**
  * RCU_POINTER_INITIALIZER() - statically initialize an RCU protected pointer
-- 
1.7.8

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