xfs: cow unwritten conversion uses uninitialized dfops
A couple COW fork unwritten extent conversion helpers pass an uninitialized dfops pointer to xfs_bmapi_write(). This does not cause problems because conversion does not use a transaction or the dfops structure for the COW fork. Drop the uninitialized usage of dfops in these codepaths and pass NULL along to xfs_bmapi_write() instead. Signed-off-by: NBrian Foster <bfoster@redhat.com> Reviewed-by: NCarlos Maiolino <cmaiolino@redhat.com> Reviewed-by: NChristoph Hellwig <hch@lst.de> Reviewed-by: NDarrick J. Wong <darrick.wong@oracle.com> Signed-off-by: NDarrick J. Wong <darrick.wong@oracle.com>
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