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The new helper ring_insert_padding is split off from and then called by queue_cmd_ring. It inserts a padding if necessary. The new helper will in a subsequent patch be used during writing of TMR notifications to command ring. Link: https://lore.kernel.org/r/20200726153510.13077-6-bstroesser@ts.fujitsu.com Reviewed-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Bodo Stroesser <bstroesser@ts.fujitsu.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>