xfs: define printk_once variants for xfs messages
There are a couple places where we directly call printk_once() and one of them doesn't follow the standard xfs subsystem printk format as a result. #define printk_once variants to go with our existing printk_ratelimited #defines so we can do one-shot printks in a consistent manner. Signed-off-by: NEric Sandeen <sandeen@redhat.com> Reviewed-by: NBrian Foster <bfoster@redhat.com> Reviewed-by: NDarrick J. Wong <darrick.wong@oracle.com> Signed-off-by: NDarrick J. Wong <darrick.wong@oracle.com>
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