NEX-8972 Async-delete side-effect that may cause unmount EBUSY
Reviewed by: Alek Pinchuk <alek@nexenta.com>
Reviewed by: Sanjay Nadkarni <sanjay.nadkarni@nexenta.com>
NEX-3762 Appliance crashes with a NULL pointer dereference during a zpool export when a zfs_vn_rele_taskq thread attempts to check a bogus rwlock from rw_write_held
Reviewed by: Josef 'Jeff' Sipek <josef.sipek@nexenta.com>

@@ -19,10 +19,11 @@
  * CDDL HEADER END
  */
 /*
  * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
+ * Copyright 2016 Nexenta Systems Inc. All rights reserved.
  */
 
 #ifndef _SYS_FS_ZFS_DIR_H
 #define _SYS_FS_ZFS_DIR_H
 

@@ -61,10 +62,11 @@
 extern void zfs_rmnode(znode_t *);
 extern void zfs_dl_name_switch(zfs_dirlock_t *dl, char *new, char **old);
 extern boolean_t zfs_dirempty(znode_t *);
 extern void zfs_unlinked_add(znode_t *, dmu_tx_t *);
 extern void zfs_unlinked_drain(zfsvfs_t *zfsvfs);
+extern void zfs_unlinked_drain_stop_wait(zfsvfs_t *zfsvfs);
 extern int zfs_sticky_remove_access(znode_t *, znode_t *, cred_t *cr);
 extern int zfs_get_xattrdir(znode_t *, vnode_t **, cred_t *, int);
 extern int zfs_make_xattrdir(znode_t *, vattr_t *, vnode_t **, cred_t *);
 
 #ifdef  __cplusplus