[PATCH 056/124] staging: lustre: statahead: use dcache-like interface for sa entry

From: Lai Siyao Rename ll_sa_entry to sa_entry, and manage sa_entry cache with dcache-like interfaces. sa_entry is not needed to be refcounted, because only scanner can free it, so after it's put in stat list, statahead thread shouldn't access it any longer.

[PATCH 056/124] staging: lustre: statahead: use dcache-like interface for sa entry

From: Lai Siyao Rename ll_sa_entry to sa_entry, and manage sa_entry cache with dcache-like interfaces. sa_entry is not needed to be refcounted, because only scanner can free it, so after it's put in stat list, statahead thread shouldn't access it any longer. ll_statahead_interpret() doesn't