[PATCH] mm/page_alloc: Split per cpu page lists and zone stats -fix -fix

From: Mel Gorman
Date: Sun May 16 2021 - 10:07:39 EST

mm/ is not W=1 clean for make allnoconfig but this patch accidentally
made it worse for i386 with the warning

mm/vmstat.c: In function â??refresh_cpu_vm_statsâ??:
mm/vmstat.c:785:34: warning: unused variable â??pcpâ?? [-Wunused-variable]
struct per_cpu_pages __percpu *pcp = zone->per_cpu_pageset;

This is a second fix to the mmotm patch

Signed-off-by: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
mm/vmstat.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/mm/vmstat.c b/mm/vmstat.c
index a2c3f58253be..f1400ba46beb 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -782,7 +782,9 @@ static int refresh_cpu_vm_stats(bool do_pagesets)

for_each_populated_zone(zone) {
struct per_cpu_zonestat __percpu *pzstats = zone->per_cpu_zonestats;
struct per_cpu_pages __percpu *pcp = zone->per_cpu_pageset;

for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++) {
int v;