5056 ZFS deadlock on db_mtx and dn_holds
Reviewed by: Will Andrews <willa@spectralogic.com>
Reviewed by: Matt Ahrens <mahrens@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Approved by: Dan McDonald <danmcd@omniti.com>

@@ -19,10 +19,11 @@
  * CDDL HEADER END
  */
 /*
  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2013 by Delphix. All rights reserved.
+ * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
  */
 
 #ifndef _SYS_ZAP_IMPL_H
 #define _SYS_ZAP_IMPL_H
 

@@ -138,10 +139,11 @@
 } zap_phys_t;
 
 typedef struct zap_table_phys zap_table_phys_t;
 
 typedef struct zap {
+        dmu_buf_user_t zap_dbu;
         objset_t *zap_objset;
         uint64_t zap_object;
         struct dmu_buf *zap_dbuf;
         krwlock_t zap_rwlock;
         boolean_t zap_ismicro;

@@ -194,11 +196,11 @@
 
 boolean_t zap_match(zap_name_t *zn, const char *matchname);
 int zap_lockdir(objset_t *os, uint64_t obj, dmu_tx_t *tx,
     krw_t lti, boolean_t fatreader, boolean_t adding, zap_t **zapp);
 void zap_unlockdir(zap_t *zap);
-void zap_evict(dmu_buf_t *db, void *vmzap);
+void zap_evict(void *dbu);
 zap_name_t *zap_name_alloc(zap_t *zap, const char *key, matchtype_t mt);
 void zap_name_free(zap_name_t *zn);
 int zap_hashbits(zap_t *zap);
 uint32_t zap_maxcd(zap_t *zap);
 uint64_t zap_getflags(zap_t *zap);