[SPARC64]: Document and fix calculation of pages_avail.

It should be set to the total number of pages that the
system will really have available after things like
initmem, the bootmem map, and initrd are freed up.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2007-03-15 22:52:18 -07:00
commit f1cfdb55f1