tree 7c7e78e9adc9f746f64290530d40ce7a9b155fb7
parent 7a2f7d18e79b09c5c5a65fb1fa0e31ad046b3116
author Ying Xue <ying.xue@windriver.com> 1398048947 +0800
committer David S. Miller <davem@davemloft.net> 1398215873 -0400

tipc: use RCU to protect media_ptr pointer

Now the media_ptr pointer is protected with tipc_net_lock write lock
on write side; tipc_net_lock read lock is used to read side. As the
part of effort of eliminating tipc_net_lock, we decide to adjust the
locking policy of media_ptr pointer protection: on write side, RTNL
lock is use while on read side RCU read lock is applied.

Signed-off-by: Ying Xue <ying.xue@windriver.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Tested-by: Erik Hugne <erik.hugne@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>