3752 want more verifiable dbuf user eviction
Submitted by:   Justin Gibbs <justing@spectralogic.com>
Submitted by:   Will Andrews <willa@spectralogic.com>

@@ -207,10 +207,11 @@
  *
  * This needs to be kept as small as possible.
  */
 
 struct sa_handle {
+        dmu_buf_user_t  db_evict;
         kmutex_t        sa_lock;
         dmu_buf_t       *sa_bonus;
         dmu_buf_t       *sa_spill;
         objset_t        *sa_os;
         void            *sa_userp;