[PATCH] libata: note missing posting in mmio cmd write

Signed-off-by: NAlan Cox <alan@redhat.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

drivers/scsi/libata-bmdma.c

@@ -214,6 +214,8 @@ static void ata_exec_command_pio(struct ata_port *ap, const struct ata_taskfile
  *	Issues MMIO write to ATA command register, with proper
  *	synchronization with interrupt handler / other threads.
  *
+ *	FIXME: missing write posting for 400nS delay enforcement
+ *
  *	LOCKING:
  *	spin_lock_irqsave(host_set lock)
  */