Convert cpu_sibling_map to be a per cpu variable

Convert cpu_sibling_map from a static array sized by NR_CPUS to a per_cpu
variable.  This saves sizeof(cpumask_t) * NR unused cpus.  Access is mostly
from startup and CPU HOTPLUG functions.

Signed-off-by: Mike Travis <travis@sgi.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: "Siddha, Suresh B" <suresh.b.siddha@intel.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/asm-ia64/topology.h b/include/asm-ia64/topology.h
index 233f1caae048..2d67b72b18d0 100644
--- a/include/asm-ia64/topology.h
+++ b/include/asm-ia64/topology.h
@@ -112,7 +112,7 @@ void build_cpu_to_node_map(void);
 #define topology_physical_package_id(cpu)       (cpu_data(cpu)->socket_id)
 #define topology_core_id(cpu)                   (cpu_data(cpu)->core_id)
 #define topology_core_siblings(cpu)             (cpu_core_map[cpu])
-#define topology_thread_siblings(cpu)           (cpu_sibling_map[cpu])
+#define topology_thread_siblings(cpu)           (per_cpu(cpu_sibling_map, cpu))
 #define smt_capable()                           (smp_num_siblings > 1)
 #endif