[PATCH 08/22] mm/vmstat: Avoid on each online CPU loops

[Sebastian Andrzej Siewior]

Both iterations over online cpus can be replaced by the proper node
specific functions.

Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Vlastimil Babka <vba...@suse.cz>
Cc: Mel Gorman <mgor...@techsingularity.net>
Cc: Johannes Weiner <han...@cmpxchg.org>
Cc: linux...@kvack.org
Signed-off-by: Sebastian Andrzej Siewior <bige...@linutronix.de>
---
 mm/vmstat.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/mm/vmstat.c b/mm/vmstat.c
index 0b63ffb5c407..b96dcec7e7d7 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -1720,19 +1720,19 @@ static void __init start_shepherd_timer(void)
 
 static void __init init_cpu_node_state(void)
 {
-       int cpu;
+       int node;
 
-       for_each_online_cpu(cpu)
-               node_set_state(cpu_to_node(cpu), N_CPU);
+       for_each_online_node(node)
+               node_set_state(node, N_CPU);
 }
 
 static void vmstat_cpu_dead(int node)
 {
-       int cpu;
+       const struct cpumask *node_cpus;
 
-       for_each_online_cpu(cpu)
-               if (cpu_to_node(cpu) == node)
-                       return;
+       node_cpus = cpumask_of_node(node);
+       if (cpumask_weight(node_cpus) > 0)
+               return;
 
        node_clear_state(node, N_CPU);
 }
-- 
2.10.2