> I hadn't considered that approach due to the way the ata_port is allocated:
>
> > libata-core.c:
> > host = scsi_host_alloc(ent->sht, sizeof(struct ata_port));
> >
> > hosts.c:
> > struct Scsi_Host *scsi_host_alloc(struct scsi_host_template *sht, int privsize)
> > {
> > shost = kzalloc(sizeof(struct Scsi_Host) + privsize, gfp_mask);
> > }
>
> The ata_port allocation is tacked onto the end of the Scsi_Host
> allocation, so the start of ata_port will only be cache aligned if the
> end of the Scsi_Host struct is, although that would be easy enough to
> fix since it's currently aligned to an unsigned long boundary.
You are right.
> I like that approach better, since it's clearer what the intent is,
> and it's easier. Is there any other way that the ata_port struct
> might be used that would invalidate this?
I can't think of one. The object lifetime is right - the ata_port is
created before the port buffer is used and destroyed after it is finished
(obviously or embedding it in the struct wouldn't work either)
Alan
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