On Thu, Jun 16, 2011 at 09:25:42AM -0700, Dave Hansen wrote:

On Thu, 2011-06-16 at 11:35 +0100, Mel Gorman wrote:

quoted

quoted

This patch removes definitions of node_start/end_pfn() in each archs
and defines a unified one in linux/mmzone.h. It's not under
CONFIG_NEED_MULTIPLE_NODES, now.

Does anyone remember *why* this did not happen in the first place? I
can't think of a good reason so I've cc'd Dave Hansen as he might
remember. 

You mean why it's not under CONFIG_NEED_MULTIPLE_NODES?  I'd guess it's
just because it keeps working in all configurations since the
pg_data_t->node_*_pfn entries are defined everywhere.

Is that what you're asking?

No, why was node_start_pfn() and node_end_pfn() defined optionally
on a per-architecture basis?

-- 
Mel Gorman
SUSE Labs

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