svn commit: r252060 - head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs

[Steven Hartland]

Author: smh
Date: Fri Jun 21 15:47:10 2013
New Revision: 252060
URL: http://svnweb.freebsd.org/changeset/base/252060

Log:
  Fix intermittent ZFS lock panic when kernel is compiled with debugging caused
  by access of uninitialized smlock in mmutex_init.
  
  MFC after:	1 week

Modified:
  head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev.c

Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev.c
==============================================================================
--- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev.c	Fri Jun 21 15:30:46 2013	(r252059)
+++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev.c	Fri Jun 21 15:47:10 2013	(r252060)
@@ -1836,6 +1836,7 @@ vdev_dtl_sync(vdev_t *vd, uint64_t txg)
 		vdev_config_dirty(vd->vdev_top);
 	}
 
+	bzero(&smlock, sizeof (smlock));
 	mutex_init(&smlock, NULL, MUTEX_DEFAULT, NULL);
 
 	space_map_create(&smsync, sm->sm_start, sm->sm_size, sm->sm_shift,