x86: fix early cpu_to_node panic from nr_free_zone_pages

call early_cpu_to_node() since per_cpu(cpu_to_node_map) might not be setup
yet.

I also had to export x86_cpu_to_node_map_early_ptr because of some calls
from the network code to numa_node_id():

	net/ipv4/netfilter/arp_tables.c:
	net/ipv4/netfilter/ip_tables.c:
	net/ipv4/netfilter/ip_tables.c:

Signed-off-by: Mike Travis <travis@sgi.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

2 files changed, 2 insertions, 2 deletions

diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c
index 70b463abf6f4..441af4edea59 100644
--- a/arch/x86/mm/numa_64.c
+++ b/arch/x86/mm/numa_64.c
@@ -37,9 +37,7 @@ u16 x86_cpu_to_node_map_init[NR_CPUS] = {
 void *x86_cpu_to_node_map_early_ptr;
 DEFINE_PER_CPU(u16, x86_cpu_to_node_map) = NUMA_NO_NODE;
 EXPORT_PER_CPU_SYMBOL(x86_cpu_to_node_map);
-#ifdef  CONFIG_DEBUG_PER_CPU_MAPS
 EXPORT_SYMBOL(x86_cpu_to_node_map_early_ptr);
-#endif
 
 u16 apicid_to_node[MAX_LOCAL_APIC] __cpuinitdata = {
         [0 ... MAX_LOCAL_APIC-1] = NUMA_NO_NODE
diff --git a/include/asm-x86/topology.h b/include/asm-x86/topology.h
index 9a8228a177c7..7b0cce2f370d 100644
--- a/include/asm-x86/topology.h
+++ b/include/asm-x86/topology.h
@@ -37,6 +37,8 @@ extern u8 cpu_to_node_map[];
 DECLARE_PER_CPU(u16, x86_cpu_to_node_map);
 extern u16 x86_cpu_to_node_map_init[];
 extern void *x86_cpu_to_node_map_early_ptr;
+/* Returns the number of the current Node. */
+#define numa_node_id()          (early_cpu_to_node(raw_smp_processor_id()))
 #endif
 
 extern cpumask_t node_to_cpumask_map[];