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| author | Ying Xue <ying.xue@windriver.com> | 2017-03-28 12:28:28 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-03-28 18:03:33 -0700 |
| commit | 7efea60dcffc151870d1abbfccdb1f11cd4b7f21 (patch) | |
| tree | 17bdb6c1fe9c4a204421de23f7f347073b868deb /net/tipc/subscr.h | |
| parent | 139bb36f754adbf6d3c836db09d6459e25167b38 (diff) | |
| download | linux-stable-7efea60dcffc151870d1abbfccdb1f11cd4b7f21.tar.gz linux-stable-7efea60dcffc151870d1abbfccdb1f11cd4b7f21.tar.bz2 linux-stable-7efea60dcffc151870d1abbfccdb1f11cd4b7f21.zip | |
tipc: adjust the policy of holding subscription kref
When a new subscription object is inserted into name_seq->subscriptions
list, it's under name_seq->lock protection; when a subscription is
deleted from the list, it's also under the same lock protection;
similarly, when accessing a subscription by going through subscriptions
list, the entire process is also protected by the name_seq->lock.
Therefore, if subscription refcount is increased before it's inserted
into subscriptions list, and its refcount is decreased after it's
deleted from the list, it will be unnecessary to hold refcount at all
before accessing subscription object which is obtained by going through
subscriptions list under name_seq->lock protection.
Signed-off-by: Ying Xue <ying.xue@windriver.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/tipc/subscr.h')
| -rw-r--r-- | net/tipc/subscr.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/tipc/subscr.h b/net/tipc/subscr.h index ffdc214c117a..ee52957dc952 100644 --- a/net/tipc/subscr.h +++ b/net/tipc/subscr.h @@ -78,4 +78,7 @@ u32 tipc_subscrp_convert_seq_type(u32 type, int swap); int tipc_topsrv_start(struct net *net); void tipc_topsrv_stop(struct net *net); +void tipc_subscrp_put(struct tipc_subscription *subscription); +void tipc_subscrp_get(struct tipc_subscription *subscription); + #endif |