From: David S. Miller <davem@davemloft.net>
Date: Wed, 1 Apr 2009 23:22:27 +0000 (-0700)
Subject: sparc64: Only allocate per-cpu areas for possible cpus.
X-Git-Tag: v2.6.31-rc1~310^2~19
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0c243ad81f234672bebb72cf3dd014b9c841781d;p=pandora-kernel.git

sparc64: Only allocate per-cpu areas for possible cpus.

This gets us real close to the generic implementation of
setup_per_cpu_areas() except:

1) We store the per-cpu offset into the trap_block[], whereas
   the generic code has it's own static array.

2) We have to initialize the %g5 register to hold the boot cpu's
   per-cpu area offset.

3) The OBP/MDESC cpu info scan is performed at the end.

Signed-off-by: David S. Miller <davem@davemloft.net>
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