tipc: use RCU to protect media_ptr pointer
authorYing Xue <ying.xue@windriver.com>
Mon, 21 Apr 2014 02:55:47 +0000 (10:55 +0800)
committerDavid S. Miller <davem@davemloft.net>
Wed, 23 Apr 2014 01:17:53 +0000 (21:17 -0400)
commit2231c5af451e4b7ae3cc56eaa4653af6ede51109
tree7c7e78e9adc9f746f64290530d40ce7a9b155fb7
parent7a2f7d18e79b09c5c5a65fb1fa0e31ad046b3116
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>
net/tipc/bearer.c
net/tipc/bearer.h