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    tipc: adjust the policy of holding subscription kref · 7efea60d
    Ying Xue 提交于
    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: NYing Xue <ying.xue@windriver.com>
    Reviewed-by: NJon Maloy <jon.maloy@ericsson.com>
    Signed-off-by: NDavid S. Miller <davem@davemloft.net>
    7efea60d
name_table.c 29.4 KB