FreeBSD/src 3539032 (r208068) — sys/cddl/contrib/opensolaris/uts/common/fs/zfs dsl_dataset.c
MFC r207909, r207910, r207911:
MFC r207909:
Fix zfs rename (may occasionally fail with dataset busy).
OpenSolaris onnv revision: 8517:41a0783dde17
MFC r207910:
Fix possible panic with zfs destroy.
OpenSolaris onnv revision: 8779:f164e0e90508
MFC r207911:
Fix failed assertion on destroying datasets from an older pool version.
OpenSolaris onnv revision: 9390:887948510f80
PR: kern/146471
Approved by: pjd, delphij (mentor)
Obtained from: OpenSolaris (Bug ID 6784757, 6784924, 6826861)
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