* [PATCH] drbd: Replace rcu_assign_pointer() with RCU_INIT_POINTER()
@ 2014-08-18 14:37 Andreea-Cristina Bernat
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From: Andreea-Cristina Bernat @ 2014-08-18 14:37 UTC (permalink / raw)
To: drbd-dev, drbd-user, linux-kernel; +Cc: paulmck
The use of "rcu_assign_pointer()" is NULLing out the pointer.
According to RCU_INIT_POINTER()'s block comment:
"1. This use of RCU_INIT_POINTER() is NULLing out the pointer"
it is better to use it instead of rcu_assign_pointer() because it has a
smaller overhead.
The following Coccinelle semantic patch was used:
@@
@@
- rcu_assign_pointer
+ RCU_INIT_POINTER
(..., NULL)
Signed-off-by: Andreea-Cristina Bernat <bernat.ada@gmail.com>
---
drivers/block/drbd/drbd_state.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/block/drbd/drbd_state.c b/drivers/block/drbd/drbd_state.c
index a5d8aae..73bc23f 100644
--- a/drivers/block/drbd/drbd_state.c
+++ b/drivers/block/drbd/drbd_state.c
@@ -1563,7 +1563,7 @@ static int w_after_conn_state_ch(struct drbd_work *w, int unused)
old_conf = connection->net_conf;
connection->my_addr_len = 0;
connection->peer_addr_len = 0;
- rcu_assign_pointer(connection->net_conf, NULL);
+ RCU_INIT_POINTER(connection->net_conf, NULL);
conn_free_crypto(connection);
mutex_unlock(&connection->resource->conf_update);
--
1.9.1
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