[PATCH/RFC 5/6] numa: ia64: support numa_mem_id() for memoryless nodes

[Lee Schermerhorn <lee.schermerhorn@hp.com>]

PATCH/RFC numa: ia64:  support memoryless nodes

Against: 2.6.32-rc5-mmotm-091101-1001

Enable 'HAVE_MEMORYLESS_NODES' by default when NUMA configured
on ia64.  Initialize percpu 'numa_mem' variable when starting
secondary cpus.  Generic initialization will handle the boot
cpu.

Nothing uses 'numa_mem_id()' yet.  Subsequent patch with modify
slab to use this.

Signed-off-by: Lee Schermerhorn <lee.schermerhorn@hp.com>

New in V2

---

 arch/ia64/Kconfig          |    4 ++++
 arch/ia64/kernel/smpboot.c |    1 +
 2 files changed, 5 insertions(+)

Index: linux-2.6.32-rc5-mmotm-091101-1001/arch/ia64/Kconfig
===================================================================
--- linux-2.6.32-rc5-mmotm-091101-1001.orig/arch/ia64/Kconfig	2009-11-11 12:09:13.000000000 -0500
+++ linux-2.6.32-rc5-mmotm-091101-1001/arch/ia64/Kconfig	2009-11-11 12:16:56.000000000 -0500
@@ -499,6 +499,10 @@ config USE_PERCPU_NUMA_NODE_ID
 	def_bool y
 	depends on NUMA
 
+config HAVE_MEMORYLESS_NODES
+	def_bool y
+	depends on NUMA
+
 config ARCH_PROC_KCORE_TEXT
 	def_bool y
 	depends on PROC_KCORE
Index: linux-2.6.32-rc5-mmotm-091101-1001/arch/ia64/kernel/smpboot.c
===================================================================
--- linux-2.6.32-rc5-mmotm-091101-1001.orig/arch/ia64/kernel/smpboot.c	2009-11-11 12:05:42.000000000 -0500
+++ linux-2.6.32-rc5-mmotm-091101-1001/arch/ia64/kernel/smpboot.c	2009-11-11 12:16:56.000000000 -0500
@@ -395,6 +395,7 @@ smp_callin (void)
 	 * numa_node_id() works after this.
 	 */
 	set_numa_node(cpu_to_node_map[cpuid]);
+	set_numa_mem(local_memory_node(cpu_to_node_map[cpuid]));
 
 	ipi_call_lock_irq();
 	spin_lock(&vector_lock);