Re: Externalize SLIT table

[Andi Kleen <ak@suse.de>]

Jack Steiner <steiner@sgi.com> writes:
>  
> +static ssize_t node_read_distance(struct sys_device * dev, char * buf)
> +{
> +	int nid = dev->id;
> +	int len = 0;
> +	int i;
> +
> +	for (i = 0; i < numnodes; i++)
> +		len += sprintf(buf + len, "%s%d", i ? " " : "", node_distance(nid, i));


One problem is that most architectures define node_distance currently
as nid != i. This would give 0 on them for the identity mapping and 10 
on IA64 which uses the SLIT values. Not good for a portable interface.
I would suggest to at least change them to return 10 for a zero node distance.

Also in general I would prefer if you could move all the SLIT parsing
into drivers/acpi/numa.c. Then the other ACPI architectures don't need to copy
the basically identical code from ia64.

-Andi