blockdev: don't set S_DAX for misaligned partitions
The dax code doesn't currently support misaligned partitions, so disable O_DIRECT via dax until such time as that support materializes. Cc: <stable@vger.kernel.org> Suggested-by: NBoaz Harrosh <boaz@plexistor.com> Signed-off-by: NJeff Moyer <jmoyer@redhat.com> Signed-off-by: NDan Williams <dan.j.williams@intel.com>
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