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tipc: use RCU to protect media_ptr pointer

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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>
This commit is contained in:
Ying Xue
2014-04-21 10:55:47 +08:00
committed by David S. Miller
parent 7a2f7d18e7
commit 2231c5af45
2 changed files with 11 additions and 4 deletions
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2
net/tipc/bearer.h
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@ -128,7 +128,7 @@ struct tipc_media {
* care of initializing all other fields.
*/
struct tipc_bearer {
void *media_ptr; /* initalized by media */
void __rcu *media_ptr; /* initalized by media */
u32 mtu; /* initalized by media */
struct tipc_media_addr addr; /* initalized by media */
char name[TIPC_MAX_BEARER_NAME];