We access numa_cpu_lookup_table array directly in all the places
to read/update numa cpu lookup information. Instead use a helper
function to update.

This is helpful in changing the way numa<-->cpu mapping in single
place when needed.

This is a cosmetic change, no change in functionality.

Signed-off-by: Raghavendra K T <redacted>
Signed-off-by: Raghavendra K T <redacted>
---
 arch/powerpc/include/asm/mmzone.h |  2 +-
 arch/powerpc/kernel/smp.c         | 10 +++++-----
 arch/powerpc/mm/numa.c            | 28 +++++++++++++++++-----------
 3 files changed, 23 insertions(+), 17 deletions(-)

diff --git a/arch/powerpc/include/asm/mmzone.h b/arch/powerpc/include/asm/mmzone.h
index 7b58917..c24a5f4 100644
--- a/arch/powerpc/include/asm/mmzone.h
+++ b/arch/powerpc/include/asm/mmzone.h

@@ -29,7 +29,7 @@ extern struct pglist_data *node_data[];
  * Following are specific to this numa platform.
  */
 
-extern int numa_cpu_lookup_table[];
+extern int numa_cpu_lookup(int cpu);

diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index 8b9502a..d5e6eee 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c

@@ -52,7 +52,6 @@ int numa_cpu_lookup_table[NR_CPUS];
 cpumask_var_t node_to_cpumask_map[MAX_NUMNODES];
 struct pglist_data *node_data[MAX_NUMNODES];
 
-EXPORT_SYMBOL(numa_cpu_lookup_table);
 EXPORT_SYMBOL(node_to_cpumask_map);
 EXPORT_SYMBOL(node_data);
 

@@ -134,19 +133,25 @@ static int __init fake_numa_create_new_node(unsigned long end_pfn,
 	return 0;
 }
 
-static void reset_numa_cpu_lookup_table(void)
+int numa_cpu_lookup(int cpu)
 {
-	unsigned int cpu;
-
-	for_each_possible_cpu(cpu)
-		numa_cpu_lookup_table[cpu] = -1;
+	return numa_cpu_lookup_table[cpu];
 }
+EXPORT_SYMBOL(numa_cpu_lookup);