6422565 Data corruption possible with range lock for dmu_sync()

[neil.per...@sun.com]

Author: perrin
Repository: /hg/onnv/onnv-gate
Revision: c87503554991954a63c50ceed9d697ed1edf0e74
Log message:
6422565 Data corruption possible with range lock for dmu_sync()

Files:
        update: usr/src/uts/common/fs/zfs/zfs_vnops.c