[PATCH 026/124] staging: lustre: statahead: statahead thread wait for RPCs to finish

From: Lai Siyao Statahead thread should wait for inflight stat RPCs to finish in case statahead RPC callback may access data allocated in statahead thread context. ll_sa_entry_fini() should keep old entry if stat RPC is not finished yet. Simplify sai refcounting: * newly

[PATCH 026/124] staging: lustre: statahead: statahead thread wait for RPCs to finish

From: Lai Siyao Statahead thread should wait for inflight stat RPCs to finish in case statahead RPC callback may access data allocated in statahead thread context. ll_sa_entry_fini() should keep old entry if stat RPC is not finished yet. Simplify sai refcounting: * newly allocated sai will